Dream Island (Yume No Shima)
Encyclopedia
is a district in Kōtō, Tokyo
Koto, Tokyo
is one of the 23 special wards of Tokyo, Japan. As of 2008, the ward has an estimated population of 442,271 and a population density of 11,070 persons per km². The total area is 39.48 km². The ward refers to itself as Kōtō City in English....

, Japan, consisting of an artificial island
Artificial island
An artificial island or man-made island is an island or archipelago that has been constructed by people rather than formed by natural means...

 built using waste landfill
Landfill
A landfill site , is a site for the disposal of waste materials by burial and is the oldest form of waste treatment...

.

Construction started in the late 1950s as a potential solution to the garbage problem in the city of 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...

.

Today, Yumenoshima has been covered over with a layer of top soil and includes a sports park (with baseball and soccer fields and a gymnasium), the Yumenoshima Tropical Greenhouse Dome
Yumenoshima Tropical Greenhouse Dome
The , also sometimes called the Yumenoshima Tropical Plant Dome, is a botanical garden located at 3-2, Yumenoshima, Kōtō, Tokyo, Japan. It is operated by the Tokyo Metropolitan Park Association and open daily except Mondays; an admission fee is charged....

, the Fukuryu Maru Memorial Museum, a large-scale yacht marina, waste disposal and incinerating facilities.

At one time the island was even the home of the Daigo Fukuryū Maru
Daigo Fukuryu Maru
was a Japanese tuna fishing boat, which was exposed to and contaminated by nuclear fallout from the United States' Castle Bravo thermonuclear device test on Bikini Atoll, on 1 March 1954....

, a fishing boat which had been exposed to nuclear fallout during the Bikini Atoll
Bikini Atoll
Bikini Atoll is an atoll, listed as a World Heritage Site, in the Micronesian Islands of the Pacific Ocean, part of Republic of the Marshall Islands....

 test. The boat was sold to a scrap dealer in the 1960s (the levels of radiation
Radiation
In physics, radiation is a process in which energetic particles or energetic waves travel through a medium or space. There are two distinct types of radiation; ionizing and non-ionizing...

had dropped to safe levels in the mid 1950s), and abandoned there.

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