Inland Sea
Encyclopedia
The , often shortened to Inland Sea, is the body of water separating Honshū
Honshu
is the largest island of Japan. The nation's main island, it is south of Hokkaido across the Tsugaru Strait, north of Shikoku across the Inland Sea, and northeast of Kyushu across the Kanmon Strait...

, Shikoku
Shikoku
is the smallest and least populous of the four main islands of Japan, located south of Honshū and east of the island of Kyūshū. Its ancient names include Iyo-no-futana-shima , Iyo-shima , and Futana-shima...

, and Kyūshū
Kyushu
is the third largest island of Japan and most southwesterly of its four main islands. Its alternate ancient names include , , and . The historical regional name is referred to Kyushu and its surrounding islands....

, three of the main islands of Japan
Japan
Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...

. It serves as an international waterway
Waterway
A waterway is any navigable body of water. Waterways can include rivers, lakes, seas, oceans, and canals. In order for a waterway to be navigable, it must meet several criteria:...

, connecting the Pacific Ocean
Pacific Ocean
The Pacific Ocean is the largest of the Earth's oceanic divisions. It extends from the Arctic in the north to the Southern Ocean in the south, bounded by Asia and Australia in the west, and the Americas in the east.At 165.2 million square kilometres in area, this largest division of the World...

 to the Sea of Japan
Sea of Japan
The Sea of Japan is a marginal sea of the western Pacific Ocean, between the Asian mainland, the Japanese archipelago and Sakhalin. It is bordered by Japan, North Korea, Russia and South Korea. Like the Mediterranean Sea, it has almost no tides due to its nearly complete enclosure from the Pacific...

. It connects to Osaka Bay
Osaka Bay
Osaka Bay is a bay in western Japan. As an eastern part of the Inland Sea, it is separated from the Pacific Ocean by the Kii Channel and from the neighbor western part of the Inland Sea by the Akashi Strait...

 and provides a sea transport link to industrial centers in the Kansai
Kansai
The or the lies in the southern-central region of Japan's main island Honshū. The region includes the prefectures of Mie, Nara, Wakayama, Kyoto, Osaka, Hyōgo, and Shiga. Depending on who makes the distinction, Fukui, Tokushima and even Tottori Prefecture are also included...

 region, including Osaka
Osaka
is a city in the Kansai region of Japan's main island of Honshu, a designated city under the Local Autonomy Law, the capital city of Osaka Prefecture and also the biggest part of Keihanshin area, which is represented by three major cities of Japan, Kyoto, Osaka and Kobe...

 and Kobe
Kobe
, pronounced , is the fifth-largest city in Japan and is the capital city of Hyōgo Prefecture on the southern side of the main island of Honshū, approximately west of Osaka...

. Before the construction of the Sanyō Main Railroad Line, it was the main transportation link between Kansai and Kyūshū.

Yamaguchi
Yamaguchi Prefecture
is a prefecture of Japan in the Chūgoku region on Honshū island. The capital is the city of Yamaguchi, in the center of the prefecture. The largest city, however, is Shimonoseki.- History :...

, Hiroshima
Hiroshima Prefecture
is a prefecture of Japan located in the Chūgoku region on Honshu island. The capital is the city of Hiroshima.- History :The area around Hiroshima was formerly divided into Bingo Province and Aki Province. This location has been a center of trade and culture since the beginning of Japan's recorded...

, Okayama
Okayama Prefecture
is a prefecture of Japan located in the Chūgoku region on Honshū island. The capital is the city of Okayama.- History :During the Meiji Restoration, the area of Okayama Prefecture was known as Bitchū Province, Bizen Province and Mimasaka Province.- Geography :...

, Hyōgo
Hyogo Prefecture
is a prefecture of Japan located in the Kansai region on Honshū island. The capital is Kobe.The prefecture's name was previously alternately spelled as Hiogo.- History :...

, Osaka
Osaka Prefecture
is a prefecture located in the Kansai region on Honshū, the main island of Japan. The capital is the city of Osaka. It is the center of Osaka-Kobe-Kyoto area.- History :...

, Kagawa
Kagawa Prefecture
is a prefecture of Japan located on Shikoku island. The capital is Takamatsu.- History :Kagawa was formerly known as Sanuki Province.For a brief period between August 1876 and December 1888, Kagawa was made a part of Ehime Prefecture.-Battle of Yashima:...

, Ehime
Ehime Prefecture
is a prefecture in northwestern Shikoku, Japan. The capital is Matsuyama.-History:Until the Meiji Restoration, Ehime prefecture was known as Iyo Province...

, Fukuoka
Fukuoka Prefecture
is a prefecture of Japan located on Kyūshū Island. The capital is the city of Fukuoka.- History :Fukuoka Prefecture includes the former provinces of Chikugo, Chikuzen, and Buzen....

, and Ōita
Oita Prefecture
is a prefecture of Japan on Kyūshū Island. The prefectural capital is the city of Ōita.- History :Around the 6th century Kyushu consisted of four regions: Tsukushi-no-kuni 筑紫国, Hi-no-kuni 肥国, and Toyo no kuni...

 prefectures all have coastlines on the Inland Sea; the cities of Hiroshima
Hiroshima
is the capital of Hiroshima Prefecture, and the largest city in the Chūgoku region of western Honshu, the largest island of Japan. It became best known as the first city in history to be destroyed by a nuclear weapon when the United States Army Air Forces dropped an atomic bomb on it at 8:15 A.M...

, Iwakuni
Iwakuni, Yamaguchi
is a city located in Yamaguchi, Japan.On March 20, 2006, the old city of Iwakuni absorbed the towns of Kuga, Mikawa, Miwa, Nishiki, Shūtō and Yū, and the village of Hongō, all from Kuga District, to form the new, expanded city of Iwakuni.- History :...

, Takamatsu
Takamatsu, Kagawa
is a city located in central Kagawa Prefecture on the island of Shikoku in Japan, and is the seat of the prefectural government. It is designated a core city by the Japanese Government. It is a port city located on the Seto Inland Sea, and is the closest port to Honshu from Shikoku island...

, and Matsuyama
Matsuyama, Ehime
is the capital city of Ehime Prefecture on the Shikoku island of Japan. It is located on the northeastern portion of the Dōgo Plain. Its name means "pine mountain." The city was founded on December 15, 1889....

 are also located on it.

The Inland Sea region is known for its moderate climate, with a stable year-round temperature and relatively low rainfall levels: The area is often called . The sea is also famous for its periodic caused by dense groupings of certain phytoplankton
Phytoplankton
Phytoplankton are the autotrophic component of the plankton community. The name comes from the Greek words φυτόν , meaning "plant", and πλαγκτός , meaning "wanderer" or "drifter". Most phytoplankton are too small to be individually seen with the unaided eye...

 that result in the death of large numbers of fish.

Since the 1980s, its northern and southern shores have been connected by the three routes of the Honshū-Shikoku Bridge Project
Honshu-Shikoku Bridge Project
The Honshū-Shikoku Bridge Project is a system of bridges connecting the islands of Honshū and Shikoku across the Inland Sea of Japan, which were previously only connected by ferry. It consists of three major connections. All bridges are now controlled by the and the...

, including the Great Seto Bridge
Great Seto Bridge
The , or Seto-Ohashi Bridge, is a series of double deck bridges connecting Okayama and Kagawa prefectures in Japan across a series of five small islands in the Seto Inland Sea. Built over the period 1978–88, it is one of the three routes of the Honshū-Shikoku Bridge Project connecting Honshū and...

, which serves both railroad and automobile traffic.

Extent

The International Hydrographic Organization
International Hydrographic Organization
The International Hydrographic Organization is the inter-governmental organisation representing the hydrographic community. It enjoys observer status at the UN and is the recognised competent authority on hydrographic surveying and nautical charting...

 defines the limits of the Inland Sea as follows:

On the West. The Southeastern limit of the Japan Sea [In Simonoseki Kaikyo
Kanmon Straits
The Kanmon Straits or the Straits of Shimonoseki is the stretch of water separating two of Japan's four main islands. On the Honshū side of the water is Shimonoseki and on the Kyūshū side is Kitakyūshū, whose former city and present ward, Moji , gave the strait its "mon"...

. A line running from Nagoya Saki (130°49'E) in Kyûsû
Kyushu
is the third largest island of Japan and most southwesterly of its four main islands. Its alternate ancient names include , , and . The historical regional name is referred to Kyushu and its surrounding islands....

 through the islands of Uma Sima and Muture Simia (33°58',5N) to Murasaki Hana (34°01'N) in Honsyû
Honshu
is the largest island of Japan. The nation's main island, it is south of Hokkaido across the Tsugaru Strait, north of Shikoku across the Inland Sea, and northeast of Kyushu across the Kanmon Strait...

].

On the East (Kii Suidô

Kii Channel
The is a strait separating the Japanese Home Islands of Honshū and Shikoku. This channel connects the Inland Sea with the Pacific Ocean....

).
A line running from Takura Saki (34°16'N) in Honsyû to Oishi Hana in the island of Awazi
Awaji Island
is an island in Hyōgo Prefecture, Japan, in the eastern part of the Seto Inland Sea between the islands of Honshū and Shikoku. The island has an area of 592.17 km²...

, through this island to Sio Saki (34°11'N) and on to Oiso Saki in Sikoku
Shikoku
is the smallest and least populous of the four main islands of Japan, located south of Honshū and east of the island of Kyūshū. Its ancient names include Iyo-no-futana-shima , Iyo-shima , and Futana-shima...

.

On the South (Bungo Suidô

Bungo Channel
The is a strait separating the Japanese islands of Kyūshū and Shikoku. It connects the Pacific Ocean and Seto Inland Sea. The narrowest part of this channel is the Hōyo Strait....

).
A line joining Sada Misaki (33°20'N) in Sikoku and Seki Saki in Kyûsyû.

Geographical features

The Inland Sea is 450 km (280 mi) long from east to west. The width from south to north varies from 15 to 55 km (9.3 to 34 mi). In most places, the water is relatively shallow. The average depth is 37.3 m (122 ft); the greatest depth is 105 m (344 ft).

The Naruto Strait
Naruto Strait
is a strait between Awaji Island and Shikoku in Japan. It connects Harima nada, the eastern part of the Inland Sea and Kii Channel. A famous feature of the strait is the Naruto whirlpools. Ōnaruto Bridge, the southern part of Akashi-Kaikyo Bridge crosses over it....

 connects the eastern part of the Inland Sea to the Kii Channel
Kii Channel
The is a strait separating the Japanese Home Islands of Honshū and Shikoku. This channel connects the Inland Sea with the Pacific Ocean....

, which in turn connects to the Pacific Ocean
Pacific Ocean
The Pacific Ocean is the largest of the Earth's oceanic divisions. It extends from the Arctic in the north to the Southern Ocean in the south, bounded by Asia and Australia in the west, and the Americas in the east.At 165.2 million square kilometres in area, this largest division of the World...

. The western part of the Inland Sea connects to the Sea of Japan
Sea of Japan
The Sea of Japan is a marginal sea of the western Pacific Ocean, between the Asian mainland, the Japanese archipelago and Sakhalin. It is bordered by Japan, North Korea, Russia and South Korea. Like the Mediterranean Sea, it has almost no tides due to its nearly complete enclosure from the Pacific...

 through the Kanmon Straits
Kanmon Straits
The Kanmon Straits or the Straits of Shimonoseki is the stretch of water separating two of Japan's four main islands. On the Honshū side of the water is Shimonoseki and on the Kyūshū side is Kitakyūshū, whose former city and present ward, Moji , gave the strait its "mon"...

 and to the Pacific through the Bungo Channel
Bungo Channel
The is a strait separating the Japanese islands of Kyūshū and Shikoku. It connects the Pacific Ocean and Seto Inland Sea. The narrowest part of this channel is the Hōyo Strait....

.

Each part of the Inland Sea has a separate name in Japanese. For example, refers to the strait between Ehime, Yamaguchi, and Ōita prefectures in the western portion of the sea; is the open expanse west of the Geiyo Archipelago, near Hiroshima prefecture; and refers to the expanse between Yamaguchi prefecture and Suō-Ōshima. There are also many strait
Strait
A strait or straits is a narrow, typically navigable channel of water that connects two larger, navigable bodies of water. It most commonly refers to a channel of water that lies between two land masses, but it may also refer to a navigable channel through a body of water that is otherwise not...

s located between the major islands, as well as a number of smaller ones that pass between islands or connect the Inland Sea to other seas or the Pacific.

Almost 3,000 islands are located in the Inland Sea, including the larger islands Awajishima
Awaji Island
is an island in Hyōgo Prefecture, Japan, in the eastern part of the Seto Inland Sea between the islands of Honshū and Shikoku. The island has an area of 592.17 km²...

 and Shōdoshima
Shodoshima
is an island located in the Inland Sea of Japan. The name means literally "Island of Small Beans". There are two towns on the island: Tonoshō and Shōdoshima, comprising the district of Shōzu.The island is famous for its stages of Twenty-Four Eyes...

. Many of the smaller islands are uninhabited.

Major islands

  • Eastern part: Awaji Island
    Awaji Island
    is an island in Hyōgo Prefecture, Japan, in the eastern part of the Seto Inland Sea between the islands of Honshū and Shikoku. The island has an area of 592.17 km²...

    , Shōdoshima
    Shodoshima
    is an island located in the Inland Sea of Japan. The name means literally "Island of Small Beans". There are two towns on the island: Tonoshō and Shōdoshima, comprising the district of Shōzu.The island is famous for its stages of Twenty-Four Eyes...

    , Ieshima Islands, Naoshima Islands, Shiwaku Islands
    Shiwaku Islands
    The or form an archipelago in the Japanese Inland Sea.The group is situated between Okayama Prefecture and Kagawa Prefecture in the western Bisan Seto and consists of 28 islands of various sizes. On the Okayama side lie the Kasaoka Islands...

  • Central part: Ōmishima, Innoshima
    Innoshima, Hiroshima
    was a city located in Hiroshima Prefecture, Japan.On January 10, 2006 Innoshima, along with the town of Setoda, from Toyota District, was merged into the expanded city of Onomichi....

    , Itsukushima
    Itsukushima
    is an island in the western part of the Inland Sea of Japan, located in the northwest of Hiroshima Bay. It is popularly known as , the Shrine Island. The island is one of . Itsukushima is part of the city of Hatsukaichi in Hiroshima Prefecture...

     (popularly known as Miyajima), Hinase Islands, Kasaoka Islands
    Kasaoka Islands
    The are a group of islands in the Seto Inland Sea of Okayama Prefecture. They are part of the city of Kasaoka.They consist of* Takashima Island 高島 * Shiraishi Island, 白石島* Kitagi Island, 北木島* Ōbi Island, 大飛島* Kobi Island, 小飛島...

  • Western part: Suō-Ōshima, Uwakai Islands, Hashirajima
    Hashirajima
    is an island in southern Hiroshima Bay of the Inland Sea, Yamaguchi Prefecture, Japan. Located 26 kilometers southeast of Iwakuni, it is part of the Kutsuna Islands within the Bōyō Islands group....

     Islands.

Fauna

Over 500 marine species are known to live in the Inland Sea. Examples are the ayu
Ayu
The or sweetfish, Plecoglossus altivelis, is an amphidromous fish, the only species in the genus Plecoglossus and in family Plecoglossidae. It is a relative of the smelts and is placed in the order Osmeriformes...

, an amphidromous
Fish migration
Many types of fish migrate on a regular basis, on time scales ranging from daily to annually or longer, and over distances ranging from a few metres to thousands of kilometres...

 fish, the horseshoe crab
Horseshoe crab
The Atlantic horseshoe crab, Limulus polyphemus, is a marine chelicerate arthropod. Despite its name, it is more closely related to spiders, ticks, and scorpions than to crabs. Horseshoe crabs are most commonly found in the Gulf of Mexico and along the northern Atlantic coast of North America...

, the finless porpoise
Finless Porpoise
The finless porpoise is one of six porpoise species. In the waters around Japan, at the northern end of its range, it is known as the sunameri . A freshwater population found in the Yangtze River in China is known locally as the jiangzhu or "river pig". There is a degree of taxonomic uncertainty...

, and the great white shark
Great white shark
The great white shark, scientific name Carcharodon carcharias, also known as the great white, white pointer, white shark, or white death, is a large lamniform shark found in coastal surface waters in all major oceans. It is known for its size, with the largest individuals known to have approached...

, which has occasionally attacked people in the Inland Sea. In old days, a lot of whale
Whale
Whale is the common name for various marine mammals of the order Cetacea. The term whale sometimes refers to all cetaceans, but more often it excludes dolphins and porpoises, which belong to suborder Odontoceti . This suborder also includes the sperm whale, killer whale, pilot whale, and beluga...

s came in the sea to feed or breed, however due to whaling
Whaling
Whaling is the hunting of whales mainly for meat and oil. Its earliest forms date to at least 3000 BC. Various coastal communities have long histories of sustenance whaling and harvesting beached whales...

 and pollution, they have totally disappeared from the Inland Sea, except for occasional lost individuals.

History

It is believed that in the last ice age
Ice age
An ice age or, more precisely, glacial age, is a generic geological period of long-term reduction in the temperature of the Earth's surface and atmosphere, resulting in the presence or expansion of continental ice sheets, polar ice sheets and alpine glaciers...

 the sea level
Sea level
Mean sea level is a measure of the average height of the ocean's surface ; used as a standard in reckoning land elevation...

 was lower than today. After the ice age, sea water poured into a lower part between the Chūgoku mountains and Shikoku
Shikoku
is the smallest and least populous of the four main islands of Japan, located south of Honshū and east of the island of Kyūshū. Its ancient names include Iyo-no-futana-shima , Iyo-shima , and Futana-shima...

 mountains and formed the Inland Sea as we know it today.

From ancient times, the Inland Sea served as a main transport line between its coastal areas, including what is today the Kansai
Kansai
The or the lies in the southern-central region of Japan's main island Honshū. The region includes the prefectures of Mie, Nara, Wakayama, Kyoto, Osaka, Hyōgo, and Shiga. Depending on who makes the distinction, Fukui, Tokushima and even Tottori Prefecture are also included...

 region and Kyūshū
Kyushu
is the third largest island of Japan and most southwesterly of its four main islands. Its alternate ancient names include , , and . The historical regional name is referred to Kyushu and its surrounding islands....

. It was also a main transport line between Japan and other countries, including Korea
Korea
Korea ) is an East Asian geographic region that is currently divided into two separate sovereign states — North Korea and South Korea. Located on the Korean Peninsula, Korea is bordered by the People's Republic of China to the northwest, Russia to the northeast, and is separated from Japan to the...

 and China
China
Chinese civilization may refer to:* China for more general discussion of the country.* Chinese culture* Greater China, the transnational community of ethnic Chinese.* History of China* Sinosphere, the area historically affected by Chinese culture...

. Even after the creation of major highways such as the Nankaidō
Nankaido
The , literally meaning "southern sea road," is a Japanese term denoting both an ancient division of the country and the main road running through it. The road connected provincial capitals in this region...

 and San'yodo
San'yodo
is a Japanese term denoting both an ancient division of the country and the main road running through it. The San'yōdō corresponds for the most part with the modern conception of the San'yō region,San'yō translates to "the sunlight-side of a mountain", while dō, depending on the context, can mean...

, the Inland Sea remained a major transport route. There are records that some foreign emissaries from China and Korea sailed on the Inland Sea.

Due to the importance of water traffic, regional powers often had their own private navies. In many documents, these navies were called , or simply pirates. Sometimes they were considered to be public enemies, but in most cases they were granted the right to self-governance as a result of their strength.

In the 12th century, Taira no Kiyomori
Taira no Kiyomori
was a general of the late Heian period of Japan. He established the first samurai-dominated administrative government in the history of Japan.After the death of his father Taira no Tadamori in 1153, Kiyomori assumed control of the Taira clan and ambitiously entered the political realm in which he...

 planned to move the capital from Kyoto
Kyoto
is a city in the central part of the island of Honshū, Japan. It has a population close to 1.5 million. Formerly the imperial capital of Japan, it is now the capital of Kyoto Prefecture, as well as a major part of the Osaka-Kobe-Kyoto metropolitan area.-History:...

 to the coastal village of Fukuhara (today Kobe
Kobe
, pronounced , is the fifth-largest city in Japan and is the capital city of Hyōgo Prefecture on the southern side of the main island of Honshū, approximately west of Osaka...

) to promote trade between Japan and the Song Dynasty
Song Dynasty
The Song Dynasty was a ruling dynasty in China between 960 and 1279; it succeeded the Five Dynasties and Ten Kingdoms Period, and was followed by the Yuan Dynasty. It was the first government in world history to issue banknotes or paper money, and the first Chinese government to establish a...

 of China. This transfer was unsuccessful, and soon after Kyoto became the capital again. Later, the Battle of Yashima
Battle of Yashima
The naval Battle of Yashima took place on 22 March 1185. Following a long string of defeats, the Taira clan retreated to Yashima, today's Takamatsu, just off the coast of Shikoku...

 took place off the coast of present-day Takamatsu.

During the feudal period, suigun seized power in most coastal areas. The Kono in Iyo province
Iyo Province
was an old province of Japan in the area that is today Ehime Prefecture on Shikoku. Iyo bordered on Awa, Sanuki, and Tosa Provinces. It was sometimes called ....

 (today Ehime prefecture
Ehime Prefecture
is a prefecture in northwestern Shikoku, Japan. The capital is Matsuyama.-History:Until the Meiji Restoration, Ehime prefecture was known as Iyo Province...

) and Kobayakawa
Kobayakawa clan
The Kobayakawa clan was a samurai clan of Japan's Sengoku period, whose holdings were in Kyūshū, the southernmost of Japan's main islands. Members of the Kobayakawa family served under the Mōri clan, and Toyotomi Hideyoshi...

 (later Mori
Mori clan
The Mōri clan was a family of daimyō, descended from Ōe no Hiromoto and established themselves in Aki Province. Their name was derived from a shōen in Mōri, Aikō District, Sagami Province. The generation of Hiromoto began to name themselves Mōri.After the Jōkyū War, Mōri was appointed to the jitō...

) in Aki province
Aki Province
or Geishū was a province in the Chūgoku Region of western Honshū, comprising the western part of what is today Hiroshima Prefecture.When Emperor Shōmu ordered two official temples for each province , two temples were founded in Aki Province...

 (today a part of Hiroshima prefecture
Hiroshima Prefecture
is a prefecture of Japan located in the Chūgoku region on Honshu island. The capital is the city of Hiroshima.- History :The area around Hiroshima was formerly divided into Bingo Province and Aki Province. This location has been a center of trade and culture since the beginning of Japan's recorded...

) clans were two of the more famous suigun lords.

In the Edo period
Edo period
The , or , is a division of Japanese history which was ruled by the shoguns of the Tokugawa family, running from 1603 to 1868. The political entity of this period was the Tokugawa shogunate....

, the Inland Sea was one of the busiest transport lines in Japan. It was a part of a navigational route around Japan's islands via the Sea of Japan
Sea of Japan
The Sea of Japan is a marginal sea of the western Pacific Ocean, between the Asian mainland, the Japanese archipelago and Sakhalin. It is bordered by Japan, North Korea, Russia and South Korea. Like the Mediterranean Sea, it has almost no tides due to its nearly complete enclosure from the Pacific...

. Many ships navigated from its coastal areas to the area along the Sea of Japan. It was not only the main transport line between Kansai
Kansai
The or the lies in the southern-central region of Japan's main island Honshū. The region includes the prefectures of Mie, Nara, Wakayama, Kyoto, Osaka, Hyōgo, and Shiga. Depending on who makes the distinction, Fukui, Tokushima and even Tottori Prefecture are also included...

 and Kyūshū
Kyushu
is the third largest island of Japan and most southwesterly of its four main islands. Its alternate ancient names include , , and . The historical regional name is referred to Kyushu and its surrounding islands....

, but also for Hokuriku
Hokuriku region
The is located in the northwestern part of Honshū, the main island of Japan. It lies along the Sea of Japan within the Chūbu region. It is almost equivalent to Koshi Province and Hokurikudō area in pre-modern Japan....

, Tōhoku
Tohoku region
The is a geographical area of Japan. The region occupies the northeastern portion of Honshu, the largest island of Japan. The region consists of six prefectures : Akita, Aomori, Fukushima, Iwate, Miyagi and Yamagata....

, and even Hokkaidō
Hokkaido
, formerly known as Ezo, Yezo, Yeso, or Yesso, is Japan's second largest island; it is also the largest and northernmost of Japan's 47 prefectural-level subdivisions. The Tsugaru Strait separates Hokkaido from Honshu, although the two islands are connected by the underwater railway Seikan Tunnel...

 (which was called Ezo at the time). Major ports in the Edo period were Osaka
Osaka
is a city in the Kansai region of Japan's main island of Honshu, a designated city under the Local Autonomy Law, the capital city of Osaka Prefecture and also the biggest part of Keihanshin area, which is represented by three major cities of Japan, Kyoto, Osaka and Kobe...

, Sakai
Sakai, Osaka
is a city in Osaka Prefecture, Japan. It has been one of the largest and most important seaports of Japan since the Medieval era.Following the February 2005 annexation of the town of Mihara, from Minamikawachi District, the city has grown further and is now the fourteenth most populous city in...

, Shimotsui, Ushimado, and Tomonoura
Tomonoura
, formerly known as , is a port in Ichichi ward of Fukuyama, Hiroshima Prefecture, Japan. It is located on the southern point of the Numakuma Peninsula, and has been a prosperous port and bay area since ancient times. Its unique circular harbor shape was preserved even when modern port facilities...

. The Inland Sea also served many daimyo
Daimyo
is a generic term referring to the powerful territorial lords in pre-modern Japan who ruled most of the country from their vast, hereditary land holdings...

in the western area of Japan as their route to and from Edo
Edo
, also romanized as Yedo or Yeddo, is the former name of the Japanese capital Tokyo, and was the seat of power for the Tokugawa shogunate which ruled Japan from 1603 to 1868...

, to fulfill their obligations under sankin kotai
Sankin kotai
was a policy of the shogunate during most of the Edo period of Japanese history. The purpose was to control the daimyo. In adopting the policy, the shogunate was continuing and refining similar policies of Toyotomi Hideyoshi. In 1635, a law required sankin kōtai, which was already an established...

. Many used ships from Osaka. Thanks to transport through the Inland Sea, Osaka became the economic center of Japan. Each han
Han (Japan)
The or domain was the name of the estate belonging to a warrior in Japan after the 17th century. The fiefs of the daimyos of the samurai class of Japan during the Edo period were called han.-Edo period:...

 had an office called Ozakayashiki in Osaka. These Ozakayashiki were among Japan's earliest forms of banks, facilitating domestic trade and helping to organize the income of the daimyo, which was in the form of koku
Koku
The is a Japanese unit of volume, equal to ten cubic shaku. In this definition, 3.5937 koku equal one cubic metre, i.e. 1 koku is approximately 278.3 litres. The koku was originally defined as a quantity of rice, historically defined as enough rice to feed one person for one year...

, giant bales of rice.

The Inland Sea was also part of the official Chosendentsushi route, bringing Korean emissaries to the Shogunate.

After the Meiji Restoration
Meiji Restoration
The , also known as the Meiji Ishin, Revolution, Reform or Renewal, was a chain of events that restored imperial rule to Japan in 1868...

, the coastal areas of the Inland Sea were rapidly industrialized. One of the headquarters of the Japanese Navy
Imperial Japanese Navy
The Imperial Japanese Navy was the navy of the Empire of Japan from 1869 until 1947, when it was dissolved following Japan's constitutional renunciation of the use of force as a means of settling international disputes...

 was built in the town of Kure
Kure, Hiroshima
is a city in Hiroshima prefecture, Japan.As of October 1, 2010, the city has an estimated population of 240,820 and a population density of 681 persons per km². The total area is 353.74 km².- History :...

. Since the Meiji period, development of land transport has been reducing the importance of the Inland Sea as a transport line. Remarkable land transportation innovations include the Sanyō Main Railroad Line in Honshū
Honshu
is the largest island of Japan. The nation's main island, it is south of Hokkaido across the Tsugaru Strait, north of Shikoku across the Inland Sea, and northeast of Kyushu across the Kanmon Strait...

 and the Yosan Main Railroad Line in Shikoku
Shikoku
is the smallest and least populous of the four main islands of Japan, located south of Honshū and east of the island of Kyūshū. Its ancient names include Iyo-no-futana-shima , Iyo-shima , and Futana-shima...

 (both completed before World War II
World War II
World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...

) and three series of bridges connecting Honshū and Shikoku (completed in the late 20th century). The Inland Sea is still used, however, by an international cargo transport line and several local transport lines connecting Honshū
Honshu
is the largest island of Japan. The nation's main island, it is south of Hokkaido across the Tsugaru Strait, north of Shikoku across the Inland Sea, and northeast of Kyushu across the Kanmon Strait...

 with Shikoku
Shikoku
is the smallest and least populous of the four main islands of Japan, located south of Honshū and east of the island of Kyūshū. Its ancient names include Iyo-no-futana-shima , Iyo-shima , and Futana-shima...

 and Kyūshū
Kyushu
is the third largest island of Japan and most southwesterly of its four main islands. Its alternate ancient names include , , and . The historical regional name is referred to Kyushu and its surrounding islands....

.

Industry

The coastal area of the Inland Sea is one of the most industrialized sections of modern Japan. Besides Osaka
Osaka
is a city in the Kansai region of Japan's main island of Honshu, a designated city under the Local Autonomy Law, the capital city of Osaka Prefecture and also the biggest part of Keihanshin area, which is represented by three major cities of Japan, Kyoto, Osaka and Kobe...

, Kobe
Kobe
, pronounced , is the fifth-largest city in Japan and is the capital city of Hyōgo Prefecture on the southern side of the main island of Honshū, approximately west of Osaka...

, and Hiroshima
Hiroshima
is the capital of Hiroshima Prefecture, and the largest city in the Chūgoku region of western Honshu, the largest island of Japan. It became best known as the first city in history to be destroyed by a nuclear weapon when the United States Army Air Forces dropped an atomic bomb on it at 8:15 A.M...

, some other major industrial cities are Kurashiki, Kure
Kure, Hiroshima
is a city in Hiroshima prefecture, Japan.As of October 1, 2010, the city has an estimated population of 240,820 and a population density of 681 persons per km². The total area is 353.74 km².- History :...

, Fukuyama
Fukuyama
-Places:*Fukuyama, Hiroshima, a city in Japan*Fukuyama, Kagoshima, a former town in Japan, now part of Kirishima city*Fukuyama, Japanese word for Mount Fuji, meaning "mountain of wind"-People:*Francis Fukuyama, an American philosopher and political economist...

, and Ube
Ube, Yamaguchi
is a city located in Yamaguchi Prefecture, Japan on the Seto Inland Sea.As of 2010, the city has an estimated population of 179,000 and the density of 622 persons per km². The total area is 287.69 km².The city was founded on November 1, 1921....

 in Honshū, and Sakaide and Niihama in Shikoku. Innoshima is also known for its ship factory.

The main industries are steel
Steel
Steel is an alloy that consists mostly of iron and has a carbon content between 0.2% and 2.1% by weight, depending on the grade. Carbon is the most common alloying material for iron, but various other alloying elements are used, such as manganese, chromium, vanadium, and tungsten...

 production, ship construction, and since the 1960s, oil refining and oil-derived production.

Thanks to the moderate climate and beautiful landscape, fishing, agriculture, and tourism bring a lot of income to the area as well.

Transport

Today the Inland Sea serves its coastal areas mainly for two purposes: first, international or domestic cargo transportation, and second, local transportation between coastal areas and islands on the sea. Major ports are Kobe
Kobe
, pronounced , is the fifth-largest city in Japan and is the capital city of Hyōgo Prefecture on the southern side of the main island of Honshū, approximately west of Osaka...

, Okayama
Okayama, Okayama
is the capital city of Okayama Prefecture in the Chūgoku region of Japan.The city was founded on June 1, 1889. As of August 2010, the city has an estimated population of 705,224 and a population density of 893 persons per km². The total area is 789.88 km²....

, Takamatsu
Port of Takamatsu
The is a seaport in Takamatsu, Kagawa Prefecture, Japan.-External links:*...

, Tokushima
Tokushima, Tokushima
is the capital city of Tokushima Prefecture on Shikoku island in Japan.As of May 1, 2011, the city had an estimated population of 263,372, with 114,325 households, and a population density of 1,377.25 persons per km². Its total area is 191.23 km²....

, Matsuyama
Matsuyama, Ehime
is the capital city of Ehime Prefecture on the Shikoku island of Japan. It is located on the northeastern portion of the Dōgo Plain. Its name means "pine mountain." The city was founded on December 15, 1889....

, and Hiroshima
Hiroshima
is the capital of Hiroshima Prefecture, and the largest city in the Chūgoku region of western Honshu, the largest island of Japan. It became best known as the first city in history to be destroyed by a nuclear weapon when the United States Army Air Forces dropped an atomic bomb on it at 8:15 A.M...

. Honshū and Shikoku have been connected by three series of bridges since the late 1980s. Those series of bridges, collectively known as the Honshū-Shikoku Bridge Project
Honshu-Shikoku Bridge Project
The Honshū-Shikoku Bridge Project is a system of bridges connecting the islands of Honshū and Shikoku across the Inland Sea of Japan, which were previously only connected by ferry. It consists of three major connections. All bridges are now controlled by the and the...

, are, from east to west, Akashi-Kaikyo Bridge, Great Seto Bridge
Great Seto Bridge
The , or Seto-Ohashi Bridge, is a series of double deck bridges connecting Okayama and Kagawa prefectures in Japan across a series of five small islands in the Seto Inland Sea. Built over the period 1978–88, it is one of the three routes of the Honshū-Shikoku Bridge Project connecting Honshū and...

, and Nishiseto Expressway
Nishiseto Expressway
The , often called the is an expressway in Japan that connects Onomichi, Hiroshima and Imabari, Ehime, going through nine of the Geiyo Islands together, including Ōshima, Umashima, and Innoshima...

. On the other hand, no bridge over the Inland Sea connects Kyūshū
Kyushu
is the third largest island of Japan and most southwesterly of its four main islands. Its alternate ancient names include , , and . The historical regional name is referred to Kyushu and its surrounding islands....

 and another island.

Historically, the Inland Sea as transport line served four coastal areas: Kansai
Kansai
The or the lies in the southern-central region of Japan's main island Honshū. The region includes the prefectures of Mie, Nara, Wakayama, Kyoto, Osaka, Hyōgo, and Shiga. Depending on who makes the distinction, Fukui, Tokushima and even Tottori Prefecture are also included...

, Chūgoku, Shikoku
Shikoku
is the smallest and least populous of the four main islands of Japan, located south of Honshū and east of the island of Kyūshū. Its ancient names include Iyo-no-futana-shima , Iyo-shima , and Futana-shima...

, and eastern Kyūshū
Kyushu
is the third largest island of Japan and most southwesterly of its four main islands. Its alternate ancient names include , , and . The historical regional name is referred to Kyushu and its surrounding islands....

. The Inland Sea provided each of these regions with local transportation and connected each region to the others and far areas, including the coastal area of the Sea of Japan
Sea of Japan
The Sea of Japan is a marginal sea of the western Pacific Ocean, between the Asian mainland, the Japanese archipelago and Sakhalin. It is bordered by Japan, North Korea, Russia and South Korea. Like the Mediterranean Sea, it has almost no tides due to its nearly complete enclosure from the Pacific...

, Korea
Korea
Korea ) is an East Asian geographic region that is currently divided into two separate sovereign states — North Korea and South Korea. Located on the Korean Peninsula, Korea is bordered by the People's Republic of China to the northwest, Russia to the northeast, and is separated from Japan to the...

, and China
China
Chinese civilization may refer to:* China for more general discussion of the country.* Chinese culture* Greater China, the transnational community of ethnic Chinese.* History of China* Sinosphere, the area historically affected by Chinese culture...

. After Kobe
Kobe
, pronounced , is the fifth-largest city in Japan and is the capital city of Hyōgo Prefecture on the southern side of the main island of Honshū, approximately west of Osaka...

 port was founded in 1868 to serve foreign ships, the Inland Sea became a major international waterway with connection to the Pacific.

Due to the development of land transportation, the travel between east and west — that is, transportation within Shikoku, within Honshū, and between Honshū and Kyūshū — shifted to railroad and road transport. Two coastal railways, San'yō Main Line in Honshū and Yosan Main Line were built. Those railway lines stimulated the local economy and once invoked a rail mania. Many short railroads were planned to connect a certain station of those two lines and a local seaport on the Inland Sea, and some of them were actually built. The Ministry of Railroads, later the Japanese National Railways
Japanese National Railways
, abbreviated or "JNR", was the national railway network of Japan from 1949 to 1987.-History:The term Kokuyū Tetsudō "state-owned railway" originally referred to a network of railway lines operated by nationalized companies under the control of the Railway Institute following the nationalization...

 and then Shikoku Railway Company
Shikoku Railway Company
, commonly known as , is one of the constituent companies of Japan Railways Group . It operates intercity rail services in the four prefectures on the island of Shikoku in Japan. The company is headquartered in Takamatsu, Kagawa Prefecture.- Lines :...

, ran some train ferry lines between Honshū and Shikoku including the line between Uno Station (Tamano
Tamano, Okayama
is a city located in the southern Okayama, Japan.As of May 1, 2011, the city has an estimated population of 64,980, with a household number of 27,933 and the density of 627.16 persons per km². The total area is 103.61 km²....

) and Takamatsu Station
Takamatsu Station
Takamatsu Station is the name of multiple train stations in Japan.* Takamatsu Station - in Kagawa Prefecture* Takamatsu Station - in Ishikawa Prefecture* Takamatsu Station - in Tokyo...

 (Takamatsu). When the Great Seto Bridge
Great Seto Bridge
The , or Seto-Ohashi Bridge, is a series of double deck bridges connecting Okayama and Kagawa prefectures in Japan across a series of five small islands in the Seto Inland Sea. Built over the period 1978–88, it is one of the three routes of the Honshū-Shikoku Bridge Project connecting Honshū and...

 was finished and began to serve the two coastal areas, that ferry line was abolished.

Major tourist sites

The coastal area of the Inland Sea is one of the most famous tourist destinations in Japan. Even before Japan opened to foreigners in the middle of the 19th century, the sea's beauty was praised and introduced to the Western world by those who visited Japan, including Philipp Franz von Siebold
Philipp Franz von Siebold
Philipp Franz Balthasar von Siebold was a German physician and traveller. He was the first European to teach Western medicine in Japan...

, and after the country's opening, Ferdinand von Richthofen
Ferdinand von Richthofen
Ferdinand Freiherr von Richthofen was a German traveller, geographer, and scientist.-Biography:He was born in Carlsruhe, Prussian Silesia, and was educated in Breslau and Berlin. He traveled or studied in the Alps of Tyrol and the Carpathians in Transylvania...

 and Thomas Cook
Thomas Cook
Thomas Cook of Melbourne, Derbyshire, England founded the travel agency that is now Thomas Cook Group.- Early days :...

.

Its coastal area, except for Osaka prefecture
Osaka Prefecture
is a prefecture located in the Kansai region on Honshū, the main island of Japan. The capital is the city of Osaka. It is the center of Osaka-Kobe-Kyoto area.- History :...

 and a part of Wakayama prefecture
Wakayama Prefecture
is a prefecture of Japan located on the Kii Peninsula in the Kansai region on Honshū island. The capital is the city of Wakayama.- History :Present-day Wakayama is mostly the western part of the province of Kii.- 1953 Wakayama Prefecture flood disaster :...

, was appointed the on March 16, 1934, as one of three oldest national parks in Japan.

Itsukushima Shrine
Itsukushima Shrine
Itsukushima Shrine is a Shinto shrine on the island of Itsukushima in the city of Hatsukaichi in Hiroshima Prefecture in Japan...

, on the island of Itsukushima
Itsukushima
is an island in the western part of the Inland Sea of Japan, located in the northwest of Hiroshima Bay. It is popularly known as , the Shrine Island. The island is one of . Itsukushima is part of the city of Hatsukaichi in Hiroshima Prefecture...

 in the city of Hatsukaichi
Hatsukaichi, Hiroshima
is a city of some 120,000 people located in Hiroshima Prefecture, Japan. The name derives from a market traditionally held on the 20th of each month with hatsuka meaning "20th day" and ichi translating to "market"...

, is a UNESCO World Heritage Site
World Heritage Site
A UNESCO World Heritage Site is a place that is listed by the UNESCO as of special cultural or physical significance...

 and one of the most famous Japanese sites outside Tokyo
Tokyo
, ; officially , is one of the 47 prefectures of Japan. Tokyo is the capital of Japan, the center of the Greater Tokyo Area, and the largest metropolitan area of Japan. It is the seat of the Japanese government and the Imperial Palace, and the home of the Japanese Imperial Family...

 and Kyoto
Kyoto
is a city in the central part of the island of Honshū, Japan. It has a population close to 1.5 million. Formerly the imperial capital of Japan, it is now the capital of Kyoto Prefecture, as well as a major part of the Osaka-Kobe-Kyoto metropolitan area.-History:...

. Shodoshima
Shodoshima
is an island located in the Inland Sea of Japan. The name means literally "Island of Small Beans". There are two towns on the island: Tonoshō and Shōdoshima, comprising the district of Shōzu.The island is famous for its stages of Twenty-Four Eyes...

, nicknamed the "island of olives," and the Naruto whirlpools are two other well-known tourist sites. Neighboring locations like Kotohira
Kotohira, Kagawa
is a town located in Nakatado District, Kagawa, Japan. The town is best known as the site of Shikoku's largest shrine complex, the Kotohira Shrine ....

 and Okayama are often combined with the tour of the Inland Sea region. Some historic sites, including Yashima in Takamatsu
Takamatsu, Kagawa
is a city located in central Kagawa Prefecture on the island of Shikoku in Japan, and is the seat of the prefectural government. It is designated a core city by the Japanese Government. It is a port city located on the Seto Inland Sea, and is the closest port to Honshu from Shikoku island...

 and Kurashiki, also attract many visitors. Hiroshima
Hiroshima
is the capital of Hiroshima Prefecture, and the largest city in the Chūgoku region of western Honshu, the largest island of Japan. It became best known as the first city in history to be destroyed by a nuclear weapon when the United States Army Air Forces dropped an atomic bomb on it at 8:15 A.M...

 is the neighbor city to Itsukushima Shrine and another UNESCO World Heritage Site because of atomic bomb damage in 1945.

Literature

Some sites along the Inland Sea were featured in eighth-century Japanese literature, both in prose and in verse, including Kojiki
Kojiki
is the oldest extant chronicle in Japan, dating from the early 8th century and composed by Ō no Yasumaro at the request of Empress Gemmei. The Kojiki is a collection of myths concerning the origin of the four home islands of Japan, and the Kami...

, Nihonshoki, and Man'yōshū. Since some sites were used as places of exile, their feeling and landscape were evoked in waka
Waka (poetry)
Waka or Yamato uta is a genre of classical Japanese verse and one of the major genres of Japanese literature...

. In fiction, in The Tale of Genji
The Tale of Genji
is a classic work of Japanese literature attributed to the Japanese noblewoman Murasaki Shikibu in the early 11th century, around the peak of the Heian period. It is sometimes called the world's first novel, the first modern novel, the first psychological novel or the first novel still to be...

, Genji fled from Kyoto and resided in Suma (now a part of Kobe
Kobe
, pronounced , is the fifth-largest city in Japan and is the capital city of Hyōgo Prefecture on the southern side of the main island of Honshū, approximately west of Osaka...

) and Akashi
Akashi, Hyogo
is a city located in southern Hyōgo Prefecture, Japan, on the Seto Inland Sea west of Kobe.As of April 1, 2011, the city has an estimated population of 290,776, with 117,392 households, and a population density of 5,907.68 persons per km²...

 for two years.

In medieval literature, because of the Genpei War
Genpei War
The was a conflict between the Taira and Minamoto clans during the late-Heian period of Japan. It resulted in the fall of the Taira clan and the establishment of the Kamakura shogunate under Minamoto Yoritomo in 1192....

, the Inland Sea is one of the important backgrounds of The Tale of the Heike
The Tale of the Heike
is an epic account of the struggle between the Taira and Minamoto clans for control of Japan at the end of the 12th century in the Genpei War...

, particularly in its latter part.

In the Western world, Donald Richie
Donald Richie
Donald Richie is an American-born author who has written about the Japanese people and Japanese cinema. Although he considers himself only a writer, Richie has directed many experimental films, the first when he was 17...

 wrote a semi-fictional novel called The Inland Sea relating a journey along the sea, beginning at Awaji Island and ending at Hiroshima, going from island to island, exploring the landscape as well as musing on Japanese culture, the nature of identity, and his own personal sense of identity.
In 1991, filmmakers Lucille Carra
Lucille Carra
Lucille Carra is an American documentary film director, producer, and writer. She is of Italian American descent. All of her films have been seen on PBS and international television. Carra has a BFA in Film Production and an MA in Cinema Studies from New York University’s Tisch School of the Arts,...

 and Brian Cotnoir produced a film version of Richie's Book, which further explored the region through interviews and images photographed by Hiro Narita. Produced by Travelfilm Company and adapted by Carra, the film won numerous awards, including Best Documentary at the Hawaii International Film Festival (1991) and the Earthwatch Film Award. It screened at the Sundance Film Festival in 1992. (NY Times review)

Koushun Takami
Koushun Takami
is the author of the novel Battle Royale, originally published in Japanese, and later translated into English by Yuji Oniki and published by Viz Media and, later, in an expanded edition by Haika Soru, a division of Viz Media....

`s novel Battle Royale
Battle Royale
thumb|260px|Cover of the 2009 expanded edition, ISBN 978-1-4215-2772-3 is a 1999 Japanese novel written by Koushun Takami. The story tells of schoolchildren who are forced to fight each other to the death....

 took place on a fictional island in the Seto Inland Sea.

External links

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