The player starts with 100 pachinko balls which are used to gain more
coins. The player controls the power with which the balls are fired and
must get the balls into (for most part of the game) a hole which starts
the slot machine. Upon getting a winning set of reels, the game goes into
Fever Mode, which allows the player to reveal a provocative picture by
putting balls into the fever doors at the bottom of the screen. When the
player reaches the specified number of coins, the Girl at the side of the
screen either changes into a costume or does something else to change the
clothing she is wearing. The player can watch her change or skip the
scene.
After a certain number of rounds, the character changes to a different one. The game changes once more further along. Now, the player, instead of trying to earn his or her quota to get the character to change how the character is dressed, tries to get the character to change into one of the previous outfits that the three models from the first three rounds were wearing. The difficulty curve of accomplishing this is indicated by the incredibly high quotas and difficult tables in later rounds. (Wikipedia)
The pinball-like game of Pachinko is extremely popular in Japan and can be found in many American casinos. The term Pachinko is derived from the Japanese word pachi-pachi, meaning the clicking of small objects or the crackling of fire. While the origins of pachinko are unknown, it most likely descended from the 'Corinth Game' which originated in Chicago, USA. The game appeared in Japan in the early 1920's and the first Pachinko hall was opened in the Osaka Prefecture. Takeichi Masamura is known as the founder of today's pachinko for he developed the 'Masamura Gauge', an arrangement of nails that became the basis for most of today's pachinko machines. In the 1980's pachinko machines became computerized and now have sounds and graphics that make the game more exciting.
Pachinko is similar to pinball in that small 11mm steel balls are shot onto the playing surface where they haphazardly bounce around and through a network of nails. The object of the game is to have the balls directed into winning pockets, whereby you receive more balls that equate to a prize or a monetary amount. The pachinko player is only responsible for controlling the speed by which the pachinko balls are shot onto the playing surface, from then on it basically becomes a game of chance. To initiate play you insert money to purchase a number of balls that are dropped into a loading area. By pulling the handle-like knob, one ball is released and projected by a spring. Most of the balls will fall unsuccessfully through the pins to the bottom, but some will fall into special pockets that activate a slot machine. At this point you are instantly rewarded with a set number of balls and if the same three symbols match up on the reels, you win an even greater amount. (arcade-history)