Tokyo Dome City
It also includes the world's largest roofed baseball stadium, known as Tokyo Dome (AKA "Big Egg"); an amusement park known as Tokyo Dome City Attractions (formerly Kōrakuen Yūenchi); and Korakuen Hall. In May 2003, a spa resort known as LaQua opened for business near Tokyo Dome City Attractions. It also hosts character shows for Toei Company's Toei Superheroes, including the Kamen Rider and Super Sentai series (the Tokyo Dome Corporation is the Super Sentai series' main sponsor).