Ōmiya Velodrome

Ōmiya Velodrome is a velodrome located in Ōmiya-ku, Saitama that conducts pari-mutuel Keirin racing - one of Japan's four authorized "Public Sports" where gambling is permitted. Its Keirin identification number for betting purposes is 25#.

Ōmiya's oval is 500 meters in circumference. A typical keirin race of 2,025 meters consists of four laps around the course.

Inside the keirin oval is a 400-meter running track used for track and field athletics events which hosted the 1962 National Athletics Championships.

Source: Wikipedia