Ryōgoku Bridge
Encyclopedia
The is a bridge in 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...

 built in 1659 spanning the Sumida River
Sumida River
The is a river which flows through Tokyo, Japan. It branches from the Arakawa River at Iwabuchi and flows into Tokyo Bay. Its tributaries include the Kanda and Shakujii rivers....

 just upstream of its confluence with the Kanda River
Kanda River
The stretches 24.6 km from Inokashira Park in Mitaka to the Sumida River under the Ryōgoku Bridge at the boundary of Taitō, Chūō, and Sumida. Its entire length lies within Tokyo, Japan. It drains an area of 105.0 km². The government of Japan classifies it as a Class I river.-Tributaries...

. Its name, meaning "two provinces," came from its joining 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...

 (the forerunner of Tokyo in Musashi Province
Musashi Province
was a province of Japan, which today comprises Tokyo Prefecture, most of Saitama Prefecture and part of Kanagawa Prefecture. It was sometimes called . The province encompassed Kawasaki and Yokohama...

) and Shimōsa Province. The neighborhood at the east end of the bridge, Ryōgoku
Ryogoku
is a neighborhood in Sumida, Tokyo. It is surrounded by various neighborhoods in Sumida, Chūō, and Taitō wards: Yokoami, Midori, Chitose, Higashi Nihonbashi, and Yanagibashi....

, derived its name from that of the bridge.
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