Gambling in Japan is a quirky paradox. Most betting is illegal, yet you'll find...

https://wool-wiki.win/index.php/What_Etiquette_Should_I_Follow_in_a_Pachinko_Parlour%3F

Gambling in Japan is a quirky paradox. Most betting is illegal, yet you'll find popular legal exceptions like pachinko parlours, horse racing, keirin cycling, and boat racing known as kyoutei