Bingo Pinballs

This page was created on 5-07-2010 – Last updated 5-18-2012


~ Japanese Sigma Bingo Machines ~




Finding information about this Japanese Amusement Company on the Internet is tough, except for a few vague references!


but I’ll keep trying!


Aruze Also Buys Sigma:


Aruze Corp. has announced that it intends to acquire 4.35 million shares of Sigma Inc. for 1.68 billion yen, which

would give it a 61.4% share in Sigma. Sigma operates over 70 game arcades in Japan as well as manufacturing coin-op

gaming machines. Aruze, which is a large pachinko machine manufacturer, will purchase the stock from Sigma President

Katsuki Manabe and other top shareholders, with the deal due to be complete by the end of February. Aruze also wants to

buy 2.5 million new shares for 950 million yen. Aruze's goal is use the profits from its pachinko machines to develop a

new business section operating amusement centers as a new source of earnings. It bought Osaka-based game software

developer SNK Corp. earlier this month.



One of the Sales Support references I found for these was a company of the Approved 2002 Japanese

Amusement Companies from the Nevada Gaming Commission, which kind of makes sense – since these

Sigma Bingos also have 3-digit payout meters – 280 Yen, what is that anyway……lol…….




Sigma Inc acquires Technical Mgmt(Aruze) from Aruze Corp Sigma Inc acquires Technical Mgmt(Aruze) from Aruze CorpOct 01, 2000

JAPAN - Sigma Inc (SI), a ##.#% owned unit of Aruze Corp, merged with Technical Management Inc (TM), a ##.#% owned unit of Aruze and provider of distribution services, in a stock swap stransaction valued at ##.### bil

Sigma Inc acquires Kan Design Co Ltd from Aruze Corp Sigma Inc acquires Kan Design Co Ltd from Aruze CorpOct 01, 2000

JAPAN - Sigma Inc (SI), a ##.#% owned unit of Aruze Corp, merged with Kan Design Co Ltd (KD), a constructor of residential and industrial buildings and a ##.#% owned unit of Aruze, in a stock swap transaction valued

Aruze Corp acquires a minority stake in Sigma Inc Aruze Corp acquires a minority stake in Sigma IncFeb 28, 2000

JAPAN - Aruze Corp (AC) rased its stake to ##.#% from ##.###%, by acquiring #.# mil new ordinary shares, in Sigma Inc (SI), a game arcade operator company, for ### Japanese yen ($#.### US) in cash per

Aruze Corp launches a tender offer for Sigma Inc Aruze Corp launches a tender offer for Sigma IncFeb 23, 2000

JAPAN - Aruze Corp (AC) completed its tender offer to acquire #.## mil ordinary shares, or a ##.###% stake or in Sigma Inc (SI), a game arcade operator company, for ### Japanese yen ($#.### US) per share, or




Sigma 1999-2005


First I would like to state that in regards Sigma slot machines, no one seems to be archiving any information on these. It really too bad as these are *great* slot machines for the home. Excellent graphics and game play with good bonus games. And they are fairly inexpensive compared to Williams and IGT models, yet have all the same features (if not more).


Sigma was bought by Mikohn around 2003, and then was sold to Progressive Gaming International (PGI) in 2005, where the UV1700 was shelved. So most Sigma uv1700 video slots were made between 1999 and 2003.


Sigma Gaming Brief History.

Sigma Gaming was actually founded in Tokyo (Japan) back in 1984. They were the first non-U.S. slot maker to gain Nevada Gaming Commision certification. They did relocate to Las Vegas in 1996, but the Japanese touch remained. Sigma was known for technical innovations, and Sigma aggressively marketed their slot machines and poker machines. This spurred competition, and IGT (International Gaming Technologies) decided to take Sigma to court over copyrights. (Sound familiar? See the Williams slot history for details.) In 1989, IGT claimed the Japanese Sigma Gaming had been stealing patented game designs from IGT. This was eventually settled out of court. Sigma is one of only a few manufacturers to hold an unrestricted license to use the Telnaes technology (which IGT holds the patent) that allows for virtual reels and unlimited odds. (Spinning reel only, does not apply to video slots, see Williams slots for more info on this.) The Telnaes technology enables Sigma to offer the ability to provide high-end payouts and progressive jackpots without limitations.


In 1990 Sigma came out with the first "slot top" (sit down) slot machines. Though not a good home slot machine format due to size, these were very popular in the casinos (and still are today). Players loved the comfort of sitting down to play. In 1991 they were honored with the State of Nevada Governor's Industry Appreciation Award for its continued contribution to Nevada's growth. Again in 1996 Sigma received the award again.


Sigma was also the first company to embed a dollar bill validator into their slot machines, which made playing a Sigma slot one-stop shopping. To the casinos it was not about comfort, but to keep players at one machine for a longer period of time. There would be no breaks to go sit down, and no need to run to the cash machine. The ideas worked, and soon IGT was copying Sigma Games. Sigma wanted to build slot machines which were user-friendly. They made their slots easy to use and more comfortable to play, hoping this would lead to player loyalty.


Sigma also released the first red, white & blue-themed game (Patriot), and a patented locking cashbox extractor. The cashbox extractor featured a design licensed to and utilized by two other leading slot machine manufacturers (Bally and Wms), and was offered by JCM.


Sigma Gaming made other slot play innovations too. Though they didn't invent it, early on they were part of the trend to increase the play using big credit bonuses. If you payed the full price to play (all the credits the game would except for one spin, which in some cases was up to 50 credits), the bonus structure made it worth your while. This is standard nowadays.

Around 1999 Sigma jumped on the video slot machine bandwagon with the Sigma uv1700 video slot. The video slot was a market largely developed by Williams (Wms), and one that Wms excelled. Sigma met and I would say surpassed Wms with the uv1700. Animation is more refined on the Sigma, and the machines are far easier to repair.


As for repairs, Sigma slots were easier for casinos to repair (and us too, since these are now in our homes!) For example the UV1700 Sigma slot machines shown on this page are based on 300 mHz Cyrix/Pentium PC computer hardware, using standard 168 pin 256meg SDRam DIMM pc100 or pc133 memory sticks and CD ROM drives. But the PC board is a bit different than those seen in your home computer. Instead of a board with a zillion connectors, the Sigma 1700 slot uses a DPX-80 board from Densitron Technologies and, using a single "ConnectBus" connector. This board eliminates the need to plug and unplug different connectors for power, HDD, FDD, monitor, etc. That is, all power, I/O, and interface signals are routed to a single ConnectBus connector. This makes the board literially "plug and play", allowing Casinos to easily swap a motherboard to fix a machine. Everything is on one board, so it's pretty painless. (Though a hardware "clear" is still required though to change a game.)


Unfortunately this all came to an end in 2005, as Sigma (called Mikohn since 2003) was bought by Progressive Gaming International (PGI). At that time PGI stopped selling the Simga UV1700, and nothing further has come of the Sigma 1700 platform.













~ Stay Tuned ~











Associated Links


Some Tokyo Japan Pinball History

Japanese Medal Games