Ryuya Kusakabe

 ( 1992 Births ) 

This success earned him a place in the K-1 Koshien King of Under 18 Tournament, the opening round of which was held in Tokyo, Japan on October 1, 2008. Kusakabe beat Ryuma Tobe by unanimous decision in the opening round and future two-weight Krush champion Daizo Sasaki by a first-round knockout in the quarterfinals. He advanced the to tournament semifinals, held on December 31, 2008, where he suffered a third-round technical knockout stoppage at the hands of the future two-weight K-1 champion Koya Urabe.

Kusakabe faced Masanori Minato in the Young Caesars tournament semifinals at "Anniversary Series 3 -ISHIN- So no San" on June 6, 2010. He won the fight by a third-round technical knockout and advanced to the Ceasers Cup final, held on the same day, where he faced Kazuyuki Fushimi, who he had beaten by unanimous decision two years prior. Kusakabe was even more successful in the rematch, as he was able to knock Fushimi out with a hook to the body at the 1:35 minute mark of the final round.

The tournament victory earned Kusakabe the right to challenge Phantom Shinya for the Shootboxing Japan Super Bantamweight Championship at "Anniversary Series 4 -ISHIN- So no Yon" on September 18, 2010. He won the fight by a third-round technical knockout to become the youngest champion in Shootboxing history at the age of 18 years and two months, breaking the record previously held by Makoto Ue by a month.

Kusakabe faced Sota Ichinohe at 2011 Fujiwara Matsuri on December 22, 2011. He won the fight by unanimous decision. Kusakabe was next challenged Yusuke Shimizu for the WPMF Japan Super Bantamweight title at M-1 Muay Thai Challenge "Suk Yod Muaythai vol.1 Part 2" on March 25, 2012. He won the fight by unanimous decision, with two scorecards of 49–48 and one scorecard of 49–47.

Kusakabe made his first WBC Muay Thai Japan Super Bantamweight title defense against Keisuke Miyamoto at NJKF KICK TO THE FUTURE 6 on September 22, 2012. He lost the fight by unanimous decision.

Kusakabe faced Ilias El Hajoui at HOOST CUP SPIRIT 1 on November 23, 2012. He won the fight by a third-round knockout. After he successfully bounced back from his second professional loss at the hands of Miyamoto, Kusakabe made his first WPMF Japan Super Bantamweight title defense against Sota Ichinohe at HOOST CUP KINGS Oujatachi no Kyouen on June 16, 2013. He lost the fight by a fifth-round knockout.

A month later, at REBELS 18 on July 21, Kusakabe faced Taisuke Degai for the inaugural REBELS Super Bantamweight (-55kg) title. He won the fight by unanimous decision, with scores of 50–47, 49–47 and 49–48.

Kusakabe announced his retirement from the sports of kickboxing and muay thai on February 19, 2014, in order to begin competing in professional boxing.

• K-1
• 2008 K-1 Koshien Super Bantamweight (-55 kg) Chūbu Tournament Winner
• 2009 K-1 Koshien Super Bantamweight (-55 kg) Tournament Third Place
• Shoot boxing
• 2010 Shoot Boxing Super Bantamweight (-55 kg) Young Ceasers Cup Tournament Winner
• 2010 Shoot Boxing Super Bantamweight (-55kg) Championship
• Youngest fighter to win a Shootboxing Championship (18 years, 60 days)
• Krush
• 2011 Krush Super Bantamweight Inaugural Championship Tournament Runner-up

• World Boxing Council Muay Thai
• 2011 WBC Muay Thai Japan Super Bantamweight Championship
• World Professional Muaythai Federation
• 2012 WPMF Japan Super Bantamweight Championship
• REBELS
• 2013 REBELS Super Bantamweight (-55kg) Championship

• IKO Kyokushinkaikan
• 2006 Kyokushinkaikan International Youth Championships U-14 -50 kg Winner
• Japan Karate Judge Organization
• 2006 JKJO Japan Cup Junior Championship Middle School -50 kg Winner
• 2007 JKJO All Japan Junior Championship Middle School -65 kg Winner

|- style="background:#fbb;" | 2013-06-16|| Loss ||align=left| Sota Ichinohe || HOOST CUP KINGS Oujatachi no Kyouen || Nagoya, Japan || KO (Elbow) || 5 ||1:40 |- ! style=background:white colspan=9 |

|- style="background:#cfc;" | 2012-11-23|| Win ||align=left| Ilias El Hajoui || HOOST CUP SPIRIT 1 || Nagoya, Japan || KO (Left hook) || 3 ||

|- style="text-align:center; background:#fbb;" | 2012-09-22 || Loss ||align=left| Keisuke Miyamoto || NJKF KICK TO THE FUTURE 6 || Tokyo, Japan || Decision (Unanimous) || 5 || 3:00 |- ! style=background:white colspan=9 |

|- style="background:#cfc;" | 2012-03-25|| Win ||align=left| Yusuke Shimizu || M-1 Muay Thai Challenge "Suk Yod Muaythai vol.1 Part 2" || Tokyo, Japan || Decision (Unanimous) || 5 || 3:00 |- ! style=background:white colspan=9 |

|- style="background:#cfc;" | 2011-12-22|| Win ||align=left| Sota Ichinohe || 2011 Fujiwara Matsuri || Tokyo, Japan || Decision (Unanimous) || 5 || 3:00

|- style="background:#cfc;" | 2011-10-02|| Win ||align=left| Arato || WBC Muay Thai Japan "The Path to the World Champion" || Tokyo, Japan || KO (Left hook) || 5 || 2:30 |- ! style=background:white colspan=9 |

|- style="background:#fbb;" | 2011-04-30|| Loss||align=left| Shota Takiya || Krush Inaugural Championship Tournament ～Triple Final Round～ Final || Tokyo, Japan ||KO (Front Kick) || 3 || 2:14 |- ! style=background:white colspan=9 |

|- style="background:#cfc;" | 2011-04-30|| Win ||align=left| Hiroaki Mizuhara || Krush Inaugural Championship Tournament ～Triple Final Round～ Semi Final || Tokyo, Japan || Decision (Unanimous) || 3 || 3:00

|- style="background:#cfc;" | 2010-12-12|| Win ||align=left| Nobuchika Terado || Krush Inaugural Championship Tournament ~First Round~|| Tokyo, Japan || Decision (Unanimous) || 3 || 3:00

|- style="background:#cfc;" | 2010-09-18|| Win ||align=left| Phantom Shinya || SHOOT BOXING 25th Anniversary Series 4 -ISHIN- So no Yon || Tokyo, Japan || KO (Punch + knee to the body) || 3 || 1:03 |- ! style=background:white colspan=9 |

|- style="background:#cfc;" | 2010-06-06|| Win ||align=left| Kazuyuki Fushimi || SHOOT BOXING 25th Anniversary Series 3 -ISHIN- So no San, Young Caesars Tournament Final || Tokyo, Japan || KO (Left hook to the body) || 3 || 1:35 |- ! style=background:white colspan=9 |

|- style="background:#cfc;" | 2010-06-06|| Win ||align=left| Masanori Minato || SHOOT BOXING 25th Anniversary Series 3 -ISHIN- So no San, Young Caesars Tournament Semifinal || Tokyo, Japan || TKO (Punches) || 3 || 2:41

|- style="background:#cfc;" | 2010-04-11|| Win ||align=left| Masahiro Fujimoto || SHOOT BOXING 25th Anniversary Series 2 -ISHIN- So no Ni || Tokyo, Japan || Ext.R Decision (Unanimous) || 4 || 3:00

|- style="background:#cfc;" | 2010-03-13|| Win ||align=left| Shota Takiya || Krush×Survivor || Tokyo, Japan || Decision (Majority) || 3 || 3:00

|- bgcolor="#cfc" | 2009-05-17 || Win||align=left| Rikiya Ozawa || AJKF Krush.3 || Tokyo, Japan || Decision (Unanimous) || 3 || 3:00

|- bgcolor="#cfc" | 2009-03-08 || Win||align=left| Genki Minato|| Nagoya Kick 〜Boogie Fight 07〜 || Nagoya, Japan || KO || 2 || 2:14

|- style="background:#cfc;" | 2008-05-28|| Win ||align=left| Kazuyuki Fushimi || SHOOT BOXING 2008 Hidama 〜Road to S-cup〜 So no San || Tokyo, Japan || Ext.R Decision (Unanimous) || 3 || 2:00

|- style="background:#cfc;" | 2008-03-16|| Win ||align=left| Phetsanga Sakrungruang || Kiatyongyut, Rajadamnern Stadium || Bangkok, Thailand || TKO (Punches) || 4 || |- | colspan=9 | Legend:

|- bgcolor="#fbb" | 2009-12-31 || Loss ||align=left| Tsukasa Fuji || Dynamite!! 2009, Koshien Tournament Reserve Fight || Saitama, Japan || Decision (Majority) || 3 || 2:00

|- bgcolor="#fbb" | 2009-10-26 || Loss ||align=left| Hiroya Kawabe || K-1 World MAX 2009 World Championship Tournament Final - Koshien Tournament, Quarterfinals || Saitama, Japan || Decision (unanimous) || 3 || 2:00

|- bgcolor="#cfc" | 2009-08-10 || Win ||align=left| Ryosuke Sasaki || K-1 Koshien 2009 Tournament FINAL 16 || Tokyo, Japan || TKO (Right cross) || 3 || 1:28

|- |- bgcolor="#fbb" | 2008-12-31 || Loss ||align=left| Koya Urabe || Dynamite!! 2008 - Koshien Tournament, Semifinals || Saitama, Japan || TKO (Doctor stoppage) || 3 || 2:29

|- |- bgcolor="#cfc" | 2008-10-01 || Win||align=left| Daizo Sasaki || K-1 World MAX 2008 World Championship Tournament Final - Koshien Tournament, Quarterfinals || Tokyo, Japan || KO (Left High Kick) || 1 || 2:43

|- bgcolor="#cfc" | 2008-10-01 || Win||align=left| Ryuma Tobe || K-1 World MAX 2008 World Championship Tournament Final - Koshien Tournament, First Round || Tokyo, Japan || Decision (Unanimous) || 3 || 2:00

|- bgcolor="#cfc" | 2008-07-06 || Win||align=left| Yusuke Tsuboi|| 2008 K-1 Koshien Chubu Region Selection Tournament, Final || Tokyo, Japan || Decision (Unanimous) || 1 || 2:00

|- bgcolor="#cfc" | 2008-07-06 || Win||align=left| Taishi Hiratsuka|| 2008 K-1 Koshien Chubu Region Selection Tournament, Semi Final || Tokyo, Japan || Decision (Unanimous) || 1 || 2:00

|- bgcolor="#cfc" | 2008-07-06 || Win||align=left| Kosuke Minowa|| 2008 K-1 Koshien Chubu Region Selection Tournament, Quarter Final || Tokyo, Japan || Decision (Unanimous) || 1 || 1:30

|- bgcolor="#cfc" | 2008-08-03 || Win||align=left| Man☆Mamoru|| Nagoya Kick 〜Boogie Fight 05〜 || Nagoya, Japan || Decision (Unanimous) || 3 || 3:00

|- bgcolor="#cfc" | 2008-05-17 || Win||align=left| Daichi Sugishita|| Nagoya Kick 〜Boogie Fight 04〜 || Nagoya, Japan || Decision (Majority) || 3 || 2:00

|- bgcolor="#cfc" | 2008-04-14 || Win||align=left| Koji Ikimi || Striking Challenge 14 || Nagoya, Japan || KO || 2 ||2:18

|- bgcolor="#cfc" | 2007-12-22 || Win||align=left| Hiroya Ashino || Team Dragon "Burning Dragon! Part 1" Amateur Challenge Match || Tokyo, Japan ||Decision (Unanimous) || 1 || 3:00

|- bgcolor="#cfc" | 2007-12-02 || Win||align=left| Kazushi Saga || Striking Challenge 13 || Nagoya, Japan || KO (Left cross) || 2 ||0:50

|- bgcolor="#cfc" | 2007-10-28 || Win||align=left| Tsuyoshi Yamamoto || BRIDGE one match challenge 6th || Tōkai, Aichi Japan || KO (Right cross) || 1 || |- | colspan=9 | Legend:

• List of male kickboxers