These small discs, often made of metal or plastic, serve as the currency for pachislo slot machines, which are skill-based gambling devices popular in Japan. They are inserted into the machine to initiate play and winnings are paid out in the same form. Unlike casino tokens, they typically do not hold a monetary value outside of the context of the machine and its associated establishment.
Their function facilitates gameplay, enabling players to interact with the machine and track their progress. Historically tied to the evolution of entertainment in Japan, these discs represent a key element of the pachislo experience, reflecting regulatory distinctions and cultural nuances surrounding gaming. Their use contributes to the unique operational model that differentiates pachislo from traditional slot machines, often enabling legal operation in environments where standard gambling is restricted.