Kotetsu Boku losses
Over 19 years as a professional, Kotetsu Boku has compiled a 26-16-2 (14) record, including five title fights across three weight classes. He has 16 losses, three of them in title fights.
16. Kotetsu Boku loses to Rikuto Shirakawa via KO
On November 21, 2020 Kotetsu Boku faced Rikuto Shirakawa in a featherweight bout. Boku was 43 years old with a record of 26-15-2, and Shirakawa was 0 with a record of 0-0. Boku was on a 4-fight losing streak. Shirakawa stopped Boku via TKO in the 3rd round.
15. Kotetsu Boku loses to Jin Aoi via unanimous decision
On August 10, 2020 Kotetsu Boku faced Jin Aoi in a featherweight bout. Boku was 43 years old with a record of 26-14-2, and Aoi was 0 with a record of 0-0. Boku was on a 3-fight losing streak. Boku lost via unanimous decision. Went the distance with Aoi.
14. Kotetsu Boku loses to Thanh Le via KO
On August 16, 2019 Kotetsu Boku faced Thanh Le in a featherweight bout. Boku was 42 years old with a record of 26-13-2, and Le was 33 with a record of 9-2. Boku was on a 2-fight losing streak, while Le was coming off a win. Le stopped Boku via KO in the 1st round.
13. Kotetsu Boku loses to Bruno Pucci via KO
On January 19, 2019 Kotetsu Boku faced Bruno Pucci in a lightweight bout. Boku was 41 years old with a record of 26-12-2, and Pucci was 28 with a record of 6-3. Boku was coming off a loss, while Pucci was coming off a win. Pucci submitted Boku via rear-naked choke in the 1st round.
12. Kotetsu Boku loses to Christian Lee via KO
On December 9, 2017 Kotetsu Boku faced Christian Lee in a featherweight bout. Boku was 40 years old with a record of 26-11-2, and Lee was 19 with a record of 7-1. Both Boku and Lee were on a 2-fight winning streak. Lee stopped Boku via KO in the 1st round.
11. Kotetsu Boku loses to Jadamba Narantungalag via KO
On May 6, 2016 Kotetsu Boku faced Jadamba Narantungalag in a featherweight bout. Boku was 38 years old with a record of 24-10-2, and Narantungalag was 40 with a record of 10-4. Boku was on a 3-fight winning streak, while Narantungalag was coming off a loss. Narantungalag submitted Boku via choke-out in the 3rd round.
10. Kotetsu Boku loses to Eduard Folayang via unanimous decision
On May 2, 2014 Kotetsu Boku faced Eduard Folayang in a lightweight bout. Boku was 36 years old with a record of 21-9-2, and Folayang was 30 with a record of 13-4. Both Boku and Folayang were coming off a win. Boku lost via unanimous decision. Went the distance with Folayang.
9. Kotetsu Boku loses to Vuyisile Colossa via unanimous decision
On September 13, 2013 Kotetsu Boku faced Vuyisile Colossa in a lightweight bout. Boku was 36 years old with a record of 20-8-2, and Colossa was 31 with a record of 5-4. Boku was coming off a loss and Colossa was on a 2-fight losing streak. Boku lost via unanimous decision. Went the distance with Colossa.
8. Kotetsu Boku loses to Shinya Aoki via KO
On April 5, 2013 Kotetsu Boku defended his ONE FC lightweight title against Shinya Aoki. Boku was 35 years old with a record of 20-7-2, and Aoki was 29 with a record of 32-6. Both Boku and Aoki were on a 2-fight winning streak. Aoki submitted Boku via rear-naked choke in the 2nd round. Lost the title.
7. Kotetsu Boku loses to Kuniyoshi Hironaka via unanimous decision
On July 18, 2011 Kotetsu Boku fought Kuniyoshi Hironaka for the vacant Shooto and Shooto welterweight titles. Boku was 34 years old with a record of 18-6-2, and Hironaka was 35 with a record of 18-8. Boku was on a 4-fight winning streak and Hironaka was on a 2-fight winning streak. Boku lost via unanimous decision. Failed to win the vacant title. Went the distance with Hironaka.
6. Kotetsu Boku loses to Yusuke Endo in their 2nd fight via KO
On September 22, 2009 Kotetsu Boku fought Yusuke Endo for the vacant Shooto welterweight title. It was their second meeting. Boku was 32 years old with a record of 14-5-2, and Endo was 0 with a record of 0-0. Boku was coming off a win. Endo submitted Boku via rear-naked choke in the 1st round. Failed to win the vacant title.
5. Kotetsu Boku loses to Joachim Hansen via unanimous decision
On March 15, 2008 Kotetsu Boku faced Joachim Hansen in a lightweight bout. Boku was 30 years old with a record of 13-4-1, and Hansen was 28 with a record of 16-6-1. Boku was coming off a loss, while Hansen was coming off a win. Boku lost via unanimous decision.
4. Kotetsu Boku loses to Artur Oumakhanov via split decision
On December 1, 2007 Kotetsu Boku faced Artur Oumakhanov in a welterweight bout. Boku was 30 years old with a record of 13-3-1, and Oumakhanov was 0 with a record of 0-0. Boku was on a 3-fight winning streak. Boku lost via split decision. Went the distance with Oumakhanov.
3. Kotetsu Boku loses to Kenichiro Togashi via KO
On June 27, 2003 Kotetsu Boku faced Kenichiro Togashi. Boku was 26 years old with a record of 4-2, and Togashi was 0 with a record of 0-0. Boku was coming off a loss. Togashi submitted Boku via armbar in the 1st round.
2. Kotetsu Boku loses to Mitsuhiro Ishida via unanimous decision
On February 6, 2003 Kotetsu Boku faced Mitsuhiro Ishida. Boku was 25 years old with a record of 4-1, and Ishida was 24 with a record of 3-1. Boku was coming off a win and Ishida was on a 3-fight winning streak. Boku lost via unanimous decision.
1. Kotetsu Boku loses to Takaharu Murahama via KO
On May 5, 2002 Kotetsu Boku faced Takaharu Murahama in a lightweight bout. Boku was 24 years old with a record of 3-0, and Murahama was 29 with a record of 5-6-5. Boku was on an undefeated 3-fight winning streak and Murahama was coming off a win. Murahama submitted Boku via kneebar in the 2nd round.