The Yakuza has historically had a hand in rigging gambling related activities, Pachinko Parlors are infamously said to be owned by (former) Yakuza. (they also used to "buy" out Sumo wrestlers to throw matches iirc). This includes Horse Races. Rumor has it that the owners of some famous named betting horses in Japan are "bought out" in a similar fashion to Sumo wrestlers by the Yakuza.
You can say this about like, literally every Mafia/Criminal organization (Cartels, Russian/Italian Mafias, Triads etc etc) in the modern day. Most who get caught are just thugs and scammers.