The Yakyuu Ken Special: Konya wa 12-kaisen

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YakyuukenSpecial title.png
The Yakyuu Ken Special: Konya wa 12-kaisen
Publisher: Societa Daikanyama
System(s): Sega Saturn
Original system(s): 3DO
Sound driver: SCSP (1 track)
Genre: Miscellaneous

Number of players: 1
Release Date RRP Code
Sega Saturn
¥6,800 T-21901G

The Yakyuu Ken Special: Konya wa 12-kaisen (THE野球拳スペシャル ~今夜は12回戦~) is originally a 1994 pornographic 3DO game made by Societa Daikanyama called The Yakyuu Ken Special: Konya wa 8-kaisen (THE野球拳スペシャル ~今夜は8回戦~). The same company made a Sega Saturn adaptation in 1995 and both versions were released exclusively in Japan. Despite what the name says, it is not a baseball game — it is a rather simplistic pornographic game where the goal is to get some young, dancing women to strip for you by beating them at rock paper scissors. This version features 4 exclusive women.

It doesn't have a Sega rating; a small warning saying the game is only for adults is placed at the top right corner of the front cover (Sega of Japan's master list gives it an X).

Gameplay (Incomplete)

{{}} chooses paper, {{}} chooses rock and {{}} chooses scissors. Every time you win, the woman takes off a piece of clothing. If you lose 5 times, you will star over.

Magazine articles

Main article: The Yakyuu Ken Special: Konya wa 12-kaisen/Magazine articles.

Promotional material


SSM JP 19961122 1996-20.pdf

Print advert in
Sega Saturn Magazine (JP) #34: "1996-20 (1996-11-22)" (1996-11-08)
also published in:

SSM JP 19980403 1998-10.pdf

Print advert in
Sega Saturn Magazine (JP) #93: "1998-10 (1998-04-03)" (1998-03-20)



An unofficial port of this version was made for the PlayStation, but with reduced difficulty.

Physical scans

Sega Retro Average 
Publication Score Source
70 №346, p33
67 №1995-08, p145[2]
61 №, p14Media:SnGwSISDRZK Book JP.pdf[3]
Sega Saturn
Based on
3 reviews

Saturn, JP
TYS Saturn JP Box Back.jpgTYS Saturn JP Box Front.jpg
TheYakyuuKenSpecial Saturn JP Disc.jpg

ROM dump status

System Hash Size Build Date Source Comments
Sega Saturn
605MB 1995 Disc (JP)


  1. File:SSM_JP_19961213_1996-21.pdf, page 45
  2. File:SSM_JP_19950801_1995-08.pdf, page 151
  3. File:SnGwSISDRZK Book JP.pdf, page 16