A Pachislo slot machine is an authentic Japanese gaming machine used in Japan casinos parlor. Pachislos operate on tokens rather then coins. This is because gambling is illegal in Japan. These tokens can be exchanged for prizes.
One reason surely is that it's Japan's one legal outlet for gambling, allowing players to try their luck and win money playing pachinko. In fact, during Japan's long economic downturn many turned to pachinko in a last ditch effort to make ends meet.
Do casinos own their slot and video poker machines outright, or do they lease from the manufacturer? Both. According to Global Gaming Business magazine, domestically, 85% of slot machines are owned by the casinos, while the other 15% are leased.