Tokyo Dome City
Tokyo Dome is part of a greater entertainment complex known as Tokyo Dome City, built of the grounds of the former Tokyo Koishikawa arsenal. Tokyo Dome City includes an amusement park and Tokyo Dome City Attractions (formerly Kōrakuen Grounds). This amusement park occupies the former Korakuen Stadium site and includes a roller coaster named Thunder Dolphin and a hubless Ferris wheel. The grounds also have an onsen called Spa LaQua, various shops, restaurants, video game centers, the largest JRA WINS horse race betting complex in Tokyo, and Oft Korakuen, which caters to rural horse races.