Gambling in Japan is a fascinating mix of strict laws and unique exceptions....

https://www.jelly-bookmarks.win/gambling-in-japan-is-a-curious-puzzle-for-travellers-while-most-forms-are

Gambling in Japan is a fascinating mix of strict laws and unique exceptions. While most forms of betting are illegal, locals and visitors can legally enjoy pachinko parlours, horse racing, keirin cycling, and kyōtei boat racing