| Pro Record: | 20-13-0 (Win-Loss-Draw) |
| Team: | U-File Camp |
| Age: | 35 |
| Sex: | Male |
| Height: | 5 Feet. 9 Inch(es). |
| Weight: | 171 lbs. |
| Out of: | Tsuruoka-shi, CA |
| Born: | Yamagata |
Ryo Chonan's Professional Record
| Date | Result | Opponent | Event | Method | Round | Time | ||
|---|---|---|---|---|---|---|---|---|
| NSF | 12/31/2011 | Loss | Hayato Sakurai | Dream - Fight for Japan: Genki Desu Ka! New Year! 2011 | Decision Unanimous Decision | 3 | ||
| NSF | 10/29/2011 | Win | Naoki Samukawa | Deep - Cage Impact 2011 in Tokyo, 2nd Round | Decision Unanimous Decision | 3 | ||
| NSF | 06/24/2011 | Win | Shigetoshi Iwase | Deep - 54 Impact | KO Strike | 1 | 4:45 | |
| NSF | 12/30/2010 | Loss | Taisuke Okuno | Sengoku: Soul of Fight | KO Strike | 1 | 0:19 | |
| NSF | 10/24/2010 | Win | Jun Hee Moon | Deep - 50 Impact | TKO/RSC Referee Stoppage from Strikes | 3 | 2:57 | |
| NSF | 04/25/2010 | Loss | Jung Hwan Cha | Astra - Yoshida's Farewell | KO Strike | 2 | 1:16 | |
| NSF | 03/22/2010 | Win | Andrew Nakahara | Dream 13 | Decision Unanimous Decision | 3 | ||
| NSF | 08/23/2009 | Win | Jutaro Nakao | Deep - 43 Impact | Decision Unanimous Decision | 3 | ||
| 04/18/2009 | Loss | TJ Grant | UFC 97: Redemption | Decision Split Decision | 3 | |||
| 12/27/2008 | Loss | Brad Blackburn, Jr. | UFC 92: The Ultimate 2008 | Decision Unanimous Decision | 3 | |||
| 09/06/2008 | Win | Roan Carneiro | UFC 88: Breakthrough | Decision Split Decision | 3 | |||
| 11/17/2007 | Loss | Karo Parisyan | UFC 78: Validation | Decision Unanimous Decision | 3 | |||
| NSF | 06/24/2007 | Win | Seo Do Wong | DEEP - DEEP in Yamagata | TKO/RSC | 1 | 2:58 | |
| NSF | 02/16/2007 | Win | Ryuta Sakurai | Deep: 28th Impact | Decision Majority Decision | 2 | ||
| NSF | 08/26/2006 | Loss | Paulo Filho | Pride: Bushido 12 Survival 06' Second Round | Submission Arm Bar | 1 | 2:30 | |
| NSF | 06/04/2006 | Win | Joey Villasenor | Pride: Bushido 11 Survival 06' Opening Round | Decision Split Decision | 2 | ||
| NSF | 02/05/2006 | Win | Ryuta Sakurai | Deep: 23rd Impact | TKO/RSC Doctor Stoppage | 1 | 1:57 | |
| NSF | 09/25/2005 | Loss | Dan Henderson | Pride: Bushido 9 | KO | 1 | ||
| NSF | 07/17/2005 | Loss | Phil Baroni | Pride: Bushido 8 | KO | 1 | 1:40 | |
| NSF | 05/22/2005 | Win | Antonio Schembri | Pride: Bushido 7 | Decision | 2 | ||
| NSF | 02/12/2005 | Win | Roan Carneiro | Deep: 18th Impact | TKO/RSC | 3 | 2:15 | |
| NSF | 12/31/2004 | Win | Anderson Silva | Pride: Shock Wave 2004 | Submission Heel Hook | 3 | 3:08 | |
| NSF | 10/14/2004 | Win | Carlos Newton | Pride: Bushido 5 | Decision Unanimous Decision | 2 | ||
| NSF | 05/23/2004 | Loss | Ricardo Almeida | Pride: Bushido 3 | Decision Unanimous Decision | 2 | ||
| NSF | 01/22/2004 | Win | Daijiro Matsui | Deep: 13th Impact | Decision Majority Decision | 3 | ||
| NSF | 09/15/2003 | Win | Hayato Sakurai | Deep: 12th Impact | TKO/RSC Doctor Stoppage | 3 | 2:10 | |
| NSF | 07/13/2003 | Win | Yuji Hisamatsu | Deep: 11th Impact | Decision Majority Decision | 2 | ||
| NSF | 12/08/2002 | Loss | Masanori Suda | Deep: 7th Impact | Decision Majority Decision | 3 | ||
| NSF | 09/07/2002 | Win | Katsumi Usuta | Deep: 6th Impact | TKO/RSC Referee Stoppage from Strikes | 1 | 0:05 | |
| NSF | 06/09/2002 | Loss | Eiji Ishikawa | Deep: 5th Impact | Decision Majority Decision | 2 | ||
| NSF | 03/30/2002 | Win | Kenji Akiyama | Deep: 4th Impact | KO | 1 | 4:22 | |
| NSF | 12/23/2001 | Win | Takaku Fuke | Deep: 3rd Impact | Decision Unanimous Decision | 3 | ||
| NSF | 05/05/2001 | Loss | Hikaru Sato | Pancrase: 2001 Neo Blood Tournament Elimination Rounds | Decision Unanimous Decision | 3 |
Ryo Chonan's Amateur Record
| Date | Result | Opponent | Event | Method | Round | Time | ||
|---|---|---|---|---|---|---|---|---|
| NSF | 08/18/2001 | Win | Hirotaka Tomiyama | Deep: Heatwave | Submission Sleeper Choke | 1 | 2:58 |
| Bout results verified by an official State, Tribal, Provincial, or Municipal Commission. | |
| NSF: | Non Sanctioned Fight |
| * : | For a variety of reasons, including weight disparity and the demands of entertainment, Exhibition Bouts are held, in which the contest is unscripted and hard fought, but the results do not count on a fighter's Official Record. |
| NC: | Fight Declared No Contest |




