Gambling in Japan is a curious blend of strict laws and curious loopholes....

https://emmasnewnews.opalvector.com/posts/is-soccer-betting-legal-in-japan-for-visitors-exploring-the-intricacies-of-sports-wagering-culture

Gambling in Japan is a curious blend of strict laws and curious loopholes. While most betting is illegal, you’ll find popular exceptions like pachinko parlours, horse racing, keirin cycling, and boat racing known as kyoutei