Japanese Slot Machines
The slot machine was introduced to Japan after World War II. Japanese Slot machines are called "Pachisuro" and can be found in Pachinko parlors and the adult sections of amusement arcades and game centers.
Japanese slot machines are regulated with IC chips, and have six different levels changing the odds of a hitting a "777". The levels provide a rough outcome of between 90% to an astonishing 160%. Japanese slot machines are indeed "beatable". The parlor operators, naturally set most of the machines to collect money, but intentionally place a few paying machines on the floor so that there will at least someone winning, encouraging players on the losing machines to keep gambling.
Despite the many varieties of the machines, there are certain rules and regulations put forward by the "Security Electronics and Communication Technology Association", an affiliate of the National Police Association (NPA). For example, there must be three reels. Also, all reels must be accompanied by buttons which stop these reels, no more than 15 coins can be paid out per play, credit meter can't go higher than 50, 3 coin maximum bet, etc.
Although a 15 coin payout may seem ridiculously low, the regulations allow "Big Bonus" (400 coins) and "Regular Bonus" modes (110 coins) where these 15 coin payouts occur nearly continuously until the bonus mode finished. While the machine is in bonus mode, the player is entertained with special winning scenes on the LCD display, and energizing music is heard, payout after payout.
Three more unique features of Pachisuro machines are "Stock", "Renchan", and "Tenjoh".
On many machines, when enough money to afford a bonus is taken in, the bonus is not immediately awarded. Typically the game merely stops making the reels slip off the bonus symbols for a few games.
If the player fails to hit the bonus during these "standby games", it is added to the "Stock" for later collection. Many current games, after finishing a bonus round, set the probability to release additional stock (gained from earlier players failing to get a bonus last time the machine stopped making the reels slip for a bit) very high for the first few games.
As a result, a lucky player may get to play several bonus rounds in a row (a "Renchan"), making payouts of 5000, and even 10,000 coins possible! The lure of "Stock" waiting in the machine, and the possibility of "Renchan" tease the gambler to keep feeding the machine. To tease him further, there is a "Tenjoh" - the maximum limit on the number of games between the "Stock" is released.
For example, if the "Tenjoh" is 1500, and the number of games played since the last bonus is 1490, the player is guaranteed to release a bonus within just 10 games.
Because of the "Stock", "Renchan", and "Tenjoh" systems, it is possible to make money by simply playing machines on which someone has just lost a huge amount of money. This is called being a "hyena". They are easy to recognize, roaming the aisles for a "Kamo" ("sucker" in English) to leave his machine.
In short, the regulations allowing "Stock", "Renchan", and "Tenjoh" has transformed the Pachisuro from a low-stakes form on entertainment just a few years back to the hard-core gambling it has become in 2006. Many people may be gambling more than they can afford, and the big payouts also lure unsavory "hyena" types into the gambling halls.
To address these social issues, a new regulation (Version 5.0) has been adopted in 2006 which caps the maximum amount of "Stock" a machine can hold to around 2000-3000 coins worth of bonus games. Moreover, all Pachisuro machines must be re-evaluated for regulation compliance every 3 three years. Version 4.0 came out in 2004, so that means all those machines with the up to 10000 coin payouts will be removed from service by 2007.
