Pachinko is a Japanese gaming device used for amusement and gambling. A pachinko machine resembles a vertical pinball machine, but with no flippers and a large number of relatively small balls. The player fires a ball up into the machine, controlling only its initial speed. The ball then cascades down through a dense forest of pins. In most cases, the ball falls to the bottom and is lost, but if it instead goes into certain pockets, more balls are released as a jackpot. Pachinko machines were originally strictly mechanical, but modern ones have incorporated extensive electronics, becoming similar to video slot machines, and referred to as Pachislo.