Mixed Martial Arts Record
| Professional record breakdown | ||
| 46 matches | 26 wins | 18 losses |
| By knockout | 7 | 8 |
| By submission | 6 | 2 |
| By decision | 9 | 6 |
| Unknown | 4 | 2 |
| Draws | 2 | |
| No contests | 0 | |
| Res. | Record | Opponent | Method | Event | Date | Round | Time | Location | Notes |
|---|---|---|---|---|---|---|---|---|---|
| Loss | 26–18–2 | Mark Hunt | TKO (punches) | Pride Total Elimination Absolute | 02006-05-05May 5, 2006 | 2 | 4:15 | Osaka, Japan | |
| Win | 26–17–2 | Mario Sperry | TKO (punches) | Pride 31 | 02006-02-26February 26, 2006 | 1 | 1:20 | Saitama, Japan | |
| Loss | 25–17–2 | Mike Kyle | Technical decision (unanimous) | Pancrase: Spiral | 02005-10-02October 2, 2005 | 3 | 1:17 | Yokohama, Japan | |
| Win | 25–16–2 | David Shvelidze | Submission (armbar) | Rings: Lithuania | 02005-08-20August 20, 2005 | 1 | N/A | Yekaterinburg, Russia | |
| Loss | 24–16–2 | Fedor Emelianenko | TKO (doctor stoppage) | Pride Bushido 6 | 02005-04-03April 3, 2005 | 1 | 10:00 | Yokohama, Japan | |
| Win | 24–15–2 | Ron Waterman | Decision (unanimous) | Pancrase: Brave 10 | 02004-11-07November 7, 2004 | 3 | 5:00 | Urayasu, Japan | Won Pancrase Super Heavyweight Championship |
| Win | 23–15–2 | Ricardo Morais | Decision (unanimous) | NJPW: Ultimate Crush | 02003-10-13October 13, 2003 | 3 | 5:00 | Tokyo, Japan | |
| Win | 22–15–2 | Sumiyabazar Dolgorsuren | TKO (doctor stoppage) | NJPW: Ultimate Crush | 02003-05-02May 2, 2003 | 1 | 2:56 | Tokyo, Japan | |
| Loss | 21–15–2 | Antônio Rogério Nogueira | Decision (unanimous) | Deep 2001: 6th Impact | 02002-09-07September 7, 2002 | 3 | 5:00 | Tokyo, Japan | |
| Loss | 21–14–2 | Ricco Rodriguez | TKO (punches) | UFC 37 | 02002-05-10May 10, 2002 | 2 | 3:25 | Bossier City, Louisiana, United States | |
| Loss | 21–13–2 | Bazigit Atajev | Decision (majority) | Rings: World Title Series 5 | 02001-12-21December 21, 2001 | 3 | 5:00 | Yokohama, Japan | |
| Win | 21–12–2 | Koba Tkeshelashvili | KO (knee) | Rings-10th Anniversary | 02001-08-11August 11, 2001 | 1 | 2:17 | Tokyo, Japan | |
| Loss | 20–12–1 | Renato Sobral | Decision (majority) | Rings: World Title Series 2 | 02001-06-15June 15, 2001 | 3 | 5:00 | Yokohama, Japan | |
| Loss | 20–11–2 | Randy Couture | Decision (unanimous) | Rings: King of Kings 2000 Final | 02001-02-24February 24, 2001 | 2 | 5:00 | Tokyo, Japan | King of Kings 2000 Tournament Quarterfinal |
| Win | 20–10–2 | Fedor Emelianenko | TKO (doctor stoppage) | Rings: King of Kings 2000 Block B | 02000-12-22December 22, 2000 | 1 | 00:17 | Osaka, Japan | King of Kings 2000 Tournament 2nd Round. Kohsaka cut Emelianenko with an illegal elbow, which led to doctor stoppage |
| Win | 19–10–2 | Mikhail Ilyukhin | KO (punches) | Rings: King of Kings 2000 Block B | 02000-12-22December 22, 2000 | 2 | 01:53 | Osaka, Japan | King of Kings 2000 Tournament 1st Round |
| Draw | 18–10–2 | Antônio Rodrigo Nogueira | Draw | Rings: Millennium Combine 3 | 02000-08-23August 23, 2000 | 2 | 5:00 | Osaka, Japan | |
| Win | 17–10–1 | Greg Wikan | Submission (toe hold) | Rings USA: Rising Stars Block A | 02000-07-15July 15, 2000 | 1 | 02:53 | Orem, Utah, United States | Rising Stars Heavyweight Tournament 2000 2nd Round |
| Win | 18–10–1 | Travis Fulton | Decision (unanimous) | Rings USA: Rising Stars Block A | 02000-07-15July 15, 2000 | 3 | 05:00 | Orem, Utah, United States | Rising Stars Heavyweight Tournament 2000 1st Round |
| Loss | 16–10–1 | Gilbert Yvel | TKO (cut) | Rings: King of Kings 1999 Block B | 01999-12-22December 22, 1999 | 3 | 05:00 | Osaka, Japan | |
| Win | 16–9–1 | Chris Haseman | Decision (split) | Rings: King of Kings 1999 Block B | 01999-12-22December 22, 1999 | 1 | 01:17 | Osaka, Japan | |
| Loss | 15–9–1 | Pedro Rizzo | TKO (punches) | UFC 23 | 01999-11-19November 19, 1999 | 3 | 01:12 | Urayasu, Japan | |
| Win | 15–8–1 | Gilbert Yvel | Technical Decision (lost points) | Rings: Rise 5th | 01999-08-19August 19, 1999 | 1 | 08:17 | Japan | |
| Win | 14–8–1 | Tim Lajcik | TKO (corner stoppage) | UFC 21 | 01999-07-16July 16, 1999 | 2 | 05:00 | Cedar Rapids, Iowa, United States | |
| Loss | 13–8–1 | Yoshihisa Yamamoto | TKO (palm strikes) | Rings: Rise 3rd | 01999-05-22May 22, 1999 | 3 | 00:44 | Japan | |
| Loss | 13–7–1 | Gilbert Yvel | TKO (doctor stoppage) | Rings: Rise 2nd | 01999-04-23April 23, 1999 | 1 | 14:58 | Japan | |
| Loss | 13–6–1 | Bas Rutten | TKO (punches) | UFC 18 | 01999-01-08January 8, 1999 | 1 | 14:15 | Kenner, Louisiana, United States | |
| Win | 13–5–1 | Pete Williams | Decision | UFC Brazil | 01998-10-16October 16, 1998 | 1 | 15:00 | São Paulo, Brazil | |
| Draw | 12–5–1 | Kiyoshi Tamura | Draw | Rings: Fourth Fighting Integration | 01998-06-27June 27, 1998 | 1 | 30:00 | Tokyo, Japan | |
| Win | 12–5 | Volk Han | Submission | Rings: Third Fighting Integration | 01998-05-29May 29, 1998 | 1 | 10:10 | Tokyo, Japan | |
| Win | 11–5 | Kimo Leopoldo | Decision (unanimous) | UFC 16 | 01998-03-13March 13, 1998 | 1 | 15:00 | Kenner, Louisiana, United States | |
| Win | 10–5 | Rob van Esdonk | Submission (heel hook) | Rings Holland: The King of Rings | 01998-02-08February 8, 1998 | 1 | 15:00 | Amsterdam, Netherlands | |
| Loss | 9–5 | Mikhail Ilyukhin | N/A | Rings: Battle Dimensions Tournament 1997 Final | 01998-01-21January 21, 1998 | N/A | N/A | ||
| Win | 9–4 | Borislav Jeliazkov | Decision (lost points) | Rings: Mega Battle Tournament 1997 Semifinal 1 | 01997-10-25October 25, 1997 | 1 | 00:00 | Japan | |
| Loss | 8–4 | Frank Shamrock | Decision | Rings: Extension Fighting 7 | 01997-09-26September 26, 1997 | 1 | 30:00 | Japan | |
| Loss | 8–3 | Kiyoshi Tamura | Submission (toe hold) | Rings: Extension Fighting 2 | 01997-04-22April 22, 1997 | 1 | 13:57 | Japan | |
| Win | 8–2 | Mikhail Ilyukhin | N/A | Rings Mega Battle Tournament: Budokan Hall 1997 | 01997-01-22January 22, 1997 | N/A | N/A | Tokyo, Japan | |
| Loss | 7–2 | Volk Han | Submission (arm bar) | Rings: Battle Dimensions Tournament 1996 Final | 01997-01-01January 1, 1997 | 1 | 13:52 | ||
| Win | 7–1 | Dick Vrij | N/A | Rings: Battle Dimensions Tournament 1996 Opening Round | 01996-10-25October 25, 1996 | N/A | N/A | ||
| Loss | 6–1 | Volk Han | Submission (arm bar) | Rings: Maelstrom 6 | 01996-08-24August 24, 1996 | 1 | 13:52 | Japan | |
| Win | 6–0 | Willie Peeters | Submission (rear-naked choke) | Rings Holland: Kings of Martial Arts | 01996-02-18February 18, 1996 | N/A | N/A | Amsterdam, Netherlands | |
| Win | 5–0 | Maurice Smith | submission (heel hook) | Rings: Budokan Hall 1996 | 01996-01-24January 24, 1996 | 1 | 4:13 | Tokyo, Japan | |
| Win | 4–0 | Egan Inoue | Decision (unanimous) | Lumax Cup: Tournament of J '95 | 01995-10-13October 13, 1995 | 1 | 3:40 | Japan | Won Lumax Cup Tournament |
| Win | 3–0 | Susumu Yamasaki | Submission (heel hook) | Lumax Cup: Tournament of J '95 | 01995-10-13October 13, 1995 | 1 | 0:52 | Japan | |
| Win | 2–0 | Hiroyuki Yoshioka | TKO (punches) | Lumax Cup: Tournament of J '95 | 01995-10-13October 13, 1995 | 3 | 3:00 | Japan | |
| Win | 1–0 | Wataru Sakata | N/A | Rings: Budokan Hall 1995 | 01995-01-25January 25, 1995 | N/A | N/A | Tokyo, Japan |
Read more about this topic: Tsuyoshi Kohsaka
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