Gambling in Japan is a curious blend of strict rules and surprising exceptions....
https://raymondssuperblogs.brightsora.com/posts/is-horse-racing-in-japan-fancy-or-more-down-to-earth
Gambling in Japan is a curious blend of strict rules and surprising exceptions. While most forms are illegal, you can still try your luck at pachinko parlours, horse racing, keirin cycling, and kyoutei boat racing