Gambling in Japan is a curious mix of strict rules and quirky exceptions. While...

https://reliabless.com/what-is-the-easiest-legal-bet-to-place-in-japan-with-little-japanese/

Gambling in Japan is a curious mix of strict rules and quirky exceptions. While most betting is illegal, there are popular outlets like pachinko parlours, horse racing, keirin bike races, and boat racing (kyoutei)