| Sieg | 28-21-2 | Mikio Ueda | KO (Punches) |  | RIZIN 35 | Apr 17, 2022 | 1 | 2:05 | Tokyo, Japan  |
| Niederlage | 27-21-2 | Sasa Milinkovic | TKO (Doctor Stoppage) |  | Heat 46 | Jan 19, 2020 | 1 | 3:23 | Tokyo, Japan |
| Niederlage | 27-20-2 | Mirko Filipović  | TKO (Punches) |  | RIZIN Fighting World Grand Prix 2017: Final Round | Dec 31, 2017 | 1 | 1:02 | Saitama, Japan |
| Niederlage | 27-19-2 | Baruto Kaito  | Decision (Unanimous) |  | RIZIN Fighting World Grand Prix | Dec 29, 2016 | 2 | 5:00 | Saitama, Japan |
| Sieg | 27-18-2 | James Thompson  | TKO (punches) |  | Rizin Fighting Federation 1: Day 1 | Dec 29, 2015 | 2 | 1:58 | Saitama, Japan |
| Niederlage | 26-18-2 | Mark Hunt  | TKO (punches) |  | Pride Total Elimination Absolute | May 05, 2006 | 2 | 4:15 | Osaka City, Japan |
| Sieg | 26-17-2 | Mario Sperry | TKO (punches) | | Pride 31 - Dreamers | Feb 26, 2006 | 1 | 1:20 | Saitama, Japan |
| Niederlage | 25-17-2 | Mike Kyle  | Technical Decision (unanimous) | | Pancrase: Spiral 8 | Oct 02, 2005 | 3 | 1:17 | Yokohama, Japan |
| Sieg | 25-16-2 | David Shvelidze  | Submission (armbar) | | Rings Russia: CIS vs. The World | Aug 20, 2005 | 1 | N/A | Yekaterinburg, Russia  |
| Niederlage | 24-16-2 | Fedor Emelianenko | TKO (doctor stoppage) |  | Pride Bushido 6 | Apr 03, 2005 | 1 | 10:00 | Yokohama, Kanagawa, Japan |
| Sieg | 24-15-2 | Ron Waterman | Decision (unanimous) | | Pancrase: Brave 10 | Nov 07, 2004 | 3 | 5:00 | Urayasu, Japan |
| Sieg | 23-15-2 | Ricardo Morais | Decision (unanimous) | | NJPW: Ultimate Crush | Oct 13, 2003 | 3 | 5:00 | Tokyo, Japan |
| Sieg | 22-15-2 | Dolgorsürengiin Sumyaabazar | TKO (doctor stoppage) | | NJPW: Ultimate Crush | May 02, 2003 | 1 | 2:56 | Tokyo, Japan |
| Niederlage | 21-15-2 | Antonio Rogério Nogueira  | Decision (unanimous) | | DEEP 2001: 6th Impact | Sep 07, 2002 | 3 | 5:00 | Tokyo, Japan |
| Niederlage | 21-14-2 | Ricco Rodriguez | TKO (punches) | | UFC 37 | May 10, 2002 | 2 | 3:25 | Bossier City, United States |
| Niederlage | 21-13-2 | Bozigit Ataev | Decision (majority) | | Rings: World Title Series 5 | Dec 21, 2001 | 3 | 5:00 | Yokohama, Japan |
| Sieg | 21-12-2 | Koba Tkeshelashvili | KO (knee) | | Rings: 10th Anniversary | Aug 11, 2001 | 1 | 2:17 | Tokyo, Japan |
| Niederlage | 20-12-2 | Renato Sobral | Decision (majority) | | Fighting Network Rings: World Title Series 2 | Jun 15, 2001 | 3 | 5:00 | Tokyo, Japan |
| Niederlage | 20-11-2 | Randy Couture | Decision (unanimous) | | Rings: King of Kings 2000 Final | Feb 24, 2001 | 2 | 5:00 | Tokyo, Japan |
| Sieg | 20-10-2 | Fedor Emelianenko | TKO (doctor stoppage) | | RINGS: King of Kings 2000 | Dec 22, 2000 | 1 | 0:17 | Osaka, Osaka, Japan |
| Sieg | 19-10-2 | Mikhail Ilyukhin | KO (punches) | | Rings: King of Kings 2000 Block B | Dec 22, 2000 | 2 | 1:53 | Osaka, Japan |
| Unentschieden | 18-10-2 | Antonio Rodrigo Nogueira | Draw | | Rings: Millennium Combine 3 | Aug 23, 2000 | 2 | 5:00 | Osaka, Osaka, Japan |
| Sieg | 18-10-1 | Greg Wikan | Submission (toe hold) | | Rings USA: Rising Stars Block A | Jul 15, 2000 | 1 | 02:53 | Orem, Utah, United States |
| Sieg | 17-10-1 | Travis Fulton | Decision (unanimous) | | Rings USA: Rising Stars Block A | Jul 15, 2000 | 3 | 05:00 | Orem, Utah, United States |
| Niederlage | 16-10-1 | Gilbert Yvel  | TKO (cut) | | Rings: King of Kings 1999 Block B | Dec 22, 1999 | 3 | 05:00 | Osaka, Japan |
| Sieg | 16-9-1 | Chris Haseman | Decision (split) | | Rings: King of Kings 1999 Block B | Dec 22, 1999 | 1 | 01:17 | Osaka, Japan |
| Niederlage | 15-9-1 | Pedro Rizzo | TKO (punches) | | UFC 23 | Nov 19, 1999 | 3 | 1:12 | Tokyo, Japan |
| Sieg | 15-8-1 | Gilbert Yvel | Technical Decision (lost points) | | Rings: Rise 5th | Aug 19, 1999 | 1 | 8:17 | Japan |
| Sieg | 14-8-1 | Tim Lajcik | TKO (corner stoppage) | | UFC 21 | Jul 16, 1999 | 2 | 05:00 | Cedar Rapids, Iowa, United States |
| Niederlage | 13-8-1 | Yoshihisa Yamamoto | TKO (palm strikes) | | Rings: Rise 3rd | May 22, 1999 | 3 | 00:44 | Japan |
| Niederlage | 13-7-1 | Gilbert Yvel | TKO (doctor stoppage) | | Rings: Rise 2nd | Apr 23, 1999 | 1 | 14:58 | Japan |
| Niederlage | 13-6-1 | Bas Rutten | TKO (punches) | | UFC 18 | Jan 08, 1999 | 1 | 14:15 | Kenner, Louisiana, United States |
| Sieg | 13-5-1 | Pete Williams | Decision | | UFC Brazil | Oct 16, 1998 | 1 | 15:00 | São Paulo, Brazil |
| Unentschieden | 12-5-1 | Kiyoshi Tamura | Draw | | Rings: Fourth Fighting Integration | Jun 27, 1998 | 1 | 30:00 | Tokyo, Japan |
| Sieg | 12-5 | Volk Han | Submission | | Rings: Third Fighting Integration | May 29, 1998 | 1 | 10:10 | Tokyo, Japan |
| Sieg | 11-5 | Kimo Leopoldo | Decision (unanimous) | | UFC 16 | Mar 13, 1998 | 1 | 15:00 | Kenner, Louisiana, United States |
| Sieg | 10-5 | Rob van Esdonk | Submission (heel hook) | | Rings Holland: The King of Rings | Feb 08, 1998 | 2 | 0:57 | Amsterdam, Netherlands |
| Niederlage | 9-5 | Mikhail Ilyukhin | N/A | | Rings: Battle Dimensions Tournament 1997 Final | Jan 21, 1998 | - | N/A | |
| Sieg | 9-4 | Borislav Jeliazkov | Decision (lost points) | | Rings - Mega Battle Tournament 1997 Semifinal 1 | Oct 25, 1997 | 1 | 00:00 | Japan |
| Niederlage | 8-4 | Frank Shamrock | Decision (unanimous) | | Rings: Extension Fighting 7 | Sep 26, 1997 | 1 | 30:00 | Japan |
| Niederlage | 8-3 | Kiyoshi Tamura | Submission (toe hold) | | Rings - Extension Fighting 2 | Apr 22, 1997 | 1 | 13:57 | Japan |
| Sieg | 8-2 | Mikhail Ilyukhin | Submission | | Rings : Mega Battle Tournament 1996: Grand Final | Jan 22, 1997 | 1 | 10:04 | Tokyo, Japan |
| Niederlage | 7-2 | Volk Han | Submission (armbar) | | Rings - Battle Dimensions Tournament 1996 Final | Jan 01, 1997 | 1 | 13:52 | |
| Sieg | 7-1 | Dick Vrij | N/A | | Rings - Battle Dimensions Tournament 1996 Opening Round | Oct 25, 1996 | - | N/A | |
| Niederlage | 6-1 | Volk Han | Submission (armbar) | | Rings - Maelstrom 6 | Aug 24, 1996 | 1 | 13:52 | Japan |
| Sieg | 6-0 | Willie Peeters | Submission (rear-naked choke) | | Rings Holland - Kings of Martial Arts | Feb 18, 1996 | 2 | 0:12 | Amsterdam, Netherlands |
| Sieg | 5-0 | Maurice Smith | Submission (heel hook) | | Rings - Budokan Hall 1996 | Jan 24, 1996 | 1 | 4:13 | Tokyo, Japan |
| Sieg | 4-0 | Egan Inoue | Decision (unanimous) | | Lumax Cup: Tournament of J '95 | Oct 13, 1995 | 1 | 3:40 | Japan |
| Sieg | 3-0 | Susumu Yamasaki | Submission (heel hook) | | Lumax Cup: Tournament of J '95 | Oct 13, 1995 | 1 | 0:52 | Japan |
| Sieg | 2-0 | Hiroyuki Yoshioka | TKO (punches) | | Lumax Cup: Tournament of J '95 | Oct 13, 1995 | 3 | 3:00 | Japan |
| Sieg | 1-0 | Wataru Sakata | N/A | | Rings - Budokan Hall 1995 | Jan 25, 1995 | - | N/A | Tokyo, Japan |
