Odaiba Marine Park
2020 Summer Olympics
Odaiba is a large artificial island in Tokyo Bay across the Rainbow Bridge from central Tokyo. It was initially built for defensive purposes in the 1850s, dramatically expanded during the late 20th century as a seaport district, and has developed since the 1990s as a major commercial, residential and leisure area. There were initially a series of six island fortresses constructed in 1853 for the shogunate to protect Edo (Tokyo) from attack from the sea, the primary threat being Commodore Matthew Perry's Black Ships which had arrived in the same year. Daiba in Japanese refers to the cannon batteries placed on the islands.