Keiichiro Yamamiya (born July 12, 1972) is a Japanese mixed martial arts fighter. He competes in the Middleweight division. He won his last fight at Pancrase - Shining 3 against Yuki Kondo on April 27, 2008.
| Career Statistics: | |
| Knockout Wins: 2 (03%) | Knockout Losses: 4 (05%) |
| TKO Wins: 7 (09%) | TKO Losses: 3 (04%) |
| Submission Wins: 3 (04%) | Submission Losses: 7 (09%) |
| Decision Wins: 26 (35%) | Decision Losses: 13 (17%) |
| Draws: 10 | No Contests: 0 |
| Career Fights: | |||||
| Opponent | Method | Event | Date | Rnd | |
| Draw | Kosei Kubota | Draw | Pancrase: Impressive Tour 1 | Feb. 06, 2011 | 2 |
| Loss | Masahiro Toryu | Knockout | Pancrase: Passion Tour 11 | Dec. 05, 2010 | 1 |
| Win | Hoon Kim | Decision | Pancrase: Passion Tour 7 | Aug. 08, 2010 | 2 |
| Loss | Kengo Ura | Split Decision | Pancrase: Passion Tour 5 | Jun. 05, 2010 | 3 |
| Win | Takenori Sato | Decision | Pancrase: Passion Tour 3 | Apr. 04, 2010 | 2 |
| Loss | Yuji Hisamatsu | Decision | Pancrase: Passion Tour 1 | Feb. 07, 2010 | 3 |
| Win | Ryuji Ohori | Knockout | Pancrase: Changing Tour 3 | Jun. 07, 2009 | 1 |
| Loss | Alexandre Ribeiro | Knockout | Sengoku: Eighth Battle | May. 02, 2009 | 3 |
| Loss | Ryo Kawamura | Unanimous Decision | Pancrase: Shining 8 | Oct. 01, 2008 | 3 |
| Win | Hiromitsu Kanehara | Unanimous Decision | Pancrase: Shining 5 | Jun. 01, 2008 | 3 |
| Win | Yuki Kondo | Decision | Pancrase: Shining 3 | Apr. 27, 2008 | 3 |
| Win | Ryo Kawamura | Unanimous Decision | Pancrase: Rising 10 | Dec. 22, 2007 | 3 |
| Draw | Carlos Toyota | Draw | MARS 6: Rapid Fire | Dec. 22, 2006 | 2 |
| Loss | Mikko Rupponen | Unanimous Decision | FF 17: Fight Festival 17 | Mar. 25, 2006 | 3 |
| Loss | Dae Won Kim | Unanimous Decision | Deep: 20th Impact | Sep. 03, 2005 | 2 |
| Loss | Nilson de Castro | Unanimous Decision | Pancrase: Spiral 2 | Mar. 06, 2005 | 3 |
| Loss | Gustavo Machado | Submission | Pancrase: Brave 11 | Nov. 26, 2004 | 3 |
| Win | Chael Sonnen | Decision | Pancrase: 2004 Neo-Blood Tournament Final | Jul. 25, 2004 | 3 |
| Win | Kozo Urita | Unanimous Decision | Pancrase: Brave 5 | May. 28, 2004 | 2 |
| Draw | Bret Bergmark | Draw | Pancrase: Hybrid 11 | Dec. 21, 2003 | 3 |
| Draw | Keith Jardine | Draw | Pancrase: Hybrid 8 | Oct. 04, 2003 | 2 |
| Win | Nate Marquardt | Unanimous Decision | Pancrase: 2003 Neo-Blood Tournament Second Round | Jul. 27, 2003 | 3 |
| Loss | Nilson de Castro | Technical Knockout | Pancrase: Hybrid 6 | Jun. 07, 2003 | 1 |
| Draw | Tsuyoshi Kurihara | Draw | Pancrase: Hybrid 4 | Apr. 12, 2003 | 2 |
| Loss | Akihiro Gono | Technical Knockout | Pancrase: Spirit 9 | Dec. 21, 2002 | 3 |
| Win | Eiji Ishikawa | Decision | Pancrase: 2002 Anniversary Show | Sep. 29, 2002 | 3 |
| Win | Mitsuyoshi Sato | Technical Knockout | Pancrase: 2002 Neo-Blood Tournament Second Round | Jul. 28, 2002 | 3 |
| Win | Ichiro Kanai | Technical Knockout | Pancrase: Spirit 4 | May. 11, 2002 | 1 |
| Win | Sumio Koyano | Knockout | Pancrase: Spirit 3 | Mar. 25, 2002 | 1 |
| Loss | Yuki Sasaki | Submission | Pancrase: Spirit 1 | Jan. 27, 2002 | 1 |
| Loss | Akihiro Gono | Unanimous Decision | Pancrase: Proof 6 | Oct. 30, 2001 | 3 |
| Win | Hikaru Sato | Unanimous Decision | Zero1: Shingeki Chapter 2 | Aug. 30, 2001 | 2 |
| Win | Yoshinori Kawasaki | Technical Knockout | Pancrase: 2001 Neo-Blood Tournament Second Round | Jul. 29, 2001 | 1 |
| Loss | Paulo Filho | Knockout | Deep: 1st Impact | Jan. 08, 2001 | 2 |
| Win | Denis Kang | Decision | Pancrase: Trans 7 | Dec. 04, 2000 | 2 |
| Win | Ikuhisa Minowa | Unanimous Decision | Pancrase: 2000 Anniversary Show | Sep. 24, 2000 | 2 |
| Win | Omar Bouiche | Submission | Pancrase: 2000 Anniversary Show | Sep. 24, 2000 | 1 |
| Win | Kosei Kubota | Decision | Pancrase: Trans 4 | Jun. 26, 2000 | 1 |
| Win | Naohisa Kawamura | Unanimous Decision | Pancrase: Trans 4 | Jun. 26, 2000 | 1 |
| Win | Chris Lytle | Unanimous Decision | Pancrase: Trans 1 | Jan. 23, 2000 | 1 |
| Loss | Eugene Jackson | Knockout | UFC 23: Ultimate Japan 2 | Nov. 19, 1999 | 3 |
| Win | Leon Dijk | Technical Knockout | Pancrase: Breakthrough 7 | Jul. 06, 1999 | 1 |
| Loss | Kiuma Kunioku | Decision | Pancrase: Breakthrough 5 | May. 23, 1999 | 1 |
| Win | Yuhi Sano | Technical Knockout | Pancrase: Breakthrough 3 | Mar. 09, 1999 | 1 |
| Draw | Jeremy Horn | Draw | Pancrase: Advance 12 | Dec. 19, 1998 | 1 |
| Win | Jason DeLucia | Decision | Pancrase: Advance 10 | Oct. 26, 1998 | 1 |
| Win | Satoshi Hasegawa | Decision | Pancrase: 1998 Neo-Blood Tournament Second Round | Jul. 26, 1998 | 1 |
| Loss | Osami Shibuya | Unanimous Decision | Pancrase: 1998 Neo-Blood Tournament Opening Round | Jul. 07, 1998 | 1 |
| Draw | Ryushi Yanagisawa | Draw | Pancrase: Advance 8 | Jun. 21, 1998 | 2 |
| Win | Takafumi Ito | Technical Knockout | Pancrase: Advance 6 | May. 12, 1998 | 2 |
| Loss | Yuki Kondo | Decision | Pancrase: Advance 5 | Apr. 26, 1998 | 1 |
| Win | Minoru Suzuki | Decision | Pancrase: Advance 3 | Mar. 01, 1998 | 1 |
| Draw | Ryushi Yanagisawa | Draw | Pancrase: Advance 2 | Feb. 06, 1998 | 1 |
| Loss | Osami Shibuya | Submission | Pancrase: Advance 1 | Jan. 16, 1998 | 1 |
| Loss | Bas Rutten | Submission | Pancrase: Alive 11 | Dec. 20, 1997 | 1 |
| Win | Takafumi Ito | Unanimous Decision | Pancrase: Alive 10 | Nov. 16, 1997 | 2 |
| Draw | Tra Telligman | Draw | Pancrase: Alive 9 | Oct. 29, 1997 | 2 |
| Win | Minoru Suzuki | Decision | Pancrase: 1997 Anniversary Show | Sep. 06, 1997 | 1 |
| Win | Osami Shibuya | Decision | Pancrase: Alive 8 | Aug. 09, 1997 | 2 |
| Win | Satoshi Hasegawa | Technical Knockout | Pancrase: 1997 Neo-Blood Tournament, Round 2 | Jul. 20, 1997 | 1 |
| Win | Kosei Kubota | Decision | Pancrase: 1997 Neo-Blood Tournament, Round 2 | Jul. 20, 1997 | 1 |
| Win | Les Johnston | Submission | Pancrase: 1997 Neo-Blood Tournament, Round 1 | Jul. 20, 1997 | 1 |
| Loss | Guy Mezger | Decision | Pancrase: Alive 7 | Jun. 30, 1997 | 1 |
| Draw | Kiuma Kunioku | Draw | Pancrase: Alive 5 | May. 24, 1997 | 1 |
| Win | Taka Michinoku | Submission | Pancrase: Alive 4 | Apr. 27, 1997 | 1 |
| Loss | Ryushi Yanagisawa | Decision | Pancrase: Alive 3 | Mar. 22, 1997 | 1 |
| Win | Takafumi Ito | Decision | Pancrase: Alive 2 | Feb. 22, 1997 | 1 |
| Win | Brian Gassaway | Decision | Pancrase: Alive 1 | Jan. 17, 1997 | 1 |
| Win | Wes Gassaway | Unanimous Decision | Pancrase: Truth 10 | Dec. 15, 1996 | 1 |
| Loss | Kazuo Takahashi | Submission | Pancrase: Truth 9 | Nov. 09, 1996 | 1 |
| Loss | Kiuma Kunioku | Submission | Pancrase: Truth 8 | Oct. 22, 1996 | 1 |
| Loss | Katsuomi Inagaki | Decision | Pancrase: 1996 Anniversary Show | Sep. 07, 1996 | 1 |
| Loss | Osami Shibuya | Submission | Pancrase: 1996 Neo-Blood Tournament, Round 2 | Jul. 23, 1996 | 1 |
| Loss | Yuki Kondo | Technical Knockout | Pancrase: 1996 Neo-Blood Tournament, Round 2 | Jul. 23, 1996 | 1 |
| Win | Satoshi Hasegawa | Split Decision | Pancrase: 1996 Neo-Blood Tournament, Round 1 | Jul. 22, 1996 | 1 |
| Total Fights: 75 | Record: 38 - 27 (10 DRAWS) | |||||
| Date | Title | |
| 05/02/2009 | Sengoku | Sengoku Eighth Battle results |
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