Tokyo Dome (東京ドーム Tōkyō Dōmu, TYO: 9681) is a stadium in Bunkyo, Tokyo, Japan. Construction on the stadium began on May 16, 1985, and it opened on March 17, 1988. It was built on the site of the
Velodrome, adjacent to the predecessor ballpark, Kōrakuen Stadium. It has a maximum total capacity of 57,000 depending on configuration, with an all-seating configuration of 42,000. Its
dome-shaped roof is an air-supported structure, a flexible membrane supported by slightly pressurizing the inside of the stadium.