Koki Osaki

Koki Osaki (大﨑孔稀) is a Japanese Muay Thai kickboxer, currently competing in the bantamweight division of RISE, where he is the incumbent RISE Bantamweight champion.

As of March 2023, he is ranked as the fifth best super flyweight (-55 kg) kickboxer in the world by Beyond Kickboxing and sixth best flyweight (-56.7 kg) by Combat Press.

Early career
Osaki made his professional debut at J-NETWORK J-KICK 2016～Honor the fighting spirits～2nd with a unanimous decision victory over Idomu Tateshima. He amassed a 10-2-1 record, before fighting Satoshi Katashima for the WMC Japan Super Flyweight title at Muay Lok 2018 Challenge. Osaki won the title with a fourth-round TKO.

In his next fight, at J-KICK 2018～4th～, Osaki fought Masanori Matsuzaki for the J-NETWORK Super Flyweight title. He won the fight by unanimous decision.

On May 26, 2019, Osaki fought Koudai Hirayama for the HOOST CUP -53kg title. Hirayama won the fight by an extra round majority decision.

Bantamweight
Osaki faced Jin Mandokoro in his RISE debut at RISE 135 on November 4, 2019. He lost the fight by unanimous decision. Osaki faced Kazuya Okuwaki, in his second RISE appearance, at RISE 142 on September 4, 2019. He won the fight by a first-round knockout, flooring Okuwai with a high kick.

Osaki faced the third-ranked RISE bantamweight contender Kyosuke at RISE 145 on January 30, 2021. He won the fight by a second-round knockout. Osaki dropped his opponent with a low kick 30 seconds into the final round of the contest, which left his opponent unable to rise from the canvas.

Osaki faced Kaito Fukuda for the BOM Bantamweight title at BOM WAVE 04 on April 11, 2021. He won the fight by unanimous decision, with two scorecards of 49–48 and one scorecard of 49–47. After capturing his third professional championship, Osaki was booked to face Azusa Kaneko in a reserve fight of the 2021 RISE Dead or Alive Tournament, which took place on July 18, 2021. He won the fight by unanimous decision, with scores of 30–29, 30–29 and 30–28.

Osaki was scheduled to face Koudai Hirayama in a tournament reserve match at RISE WORLD SERIES 2021 Yokohama on September 23, 2021. The two fought previously on May 26, 2019, with Hirayama winning by an extra round majority decision. Osaki was later rescheduled to face Shiro in the tournament semifinals, as a short notice replacement for his brother Kazuki Osaki. He was later removed from the tournament, as he had missed weight by 3.2 kg.

Catchweight bouts
Osaki was booked to face Tatsuto Ito at 57.5kg for RISE 156 on March 27, 2022. He won the fight by unanimous decision, with all three judges scoring the bout 30–28 in his favor.

Osaki faced Yugo Kato in a 55.5 kilogram bout at the May 28, 2022, NO KICK NO LIFE event. He won the fight by a fourth-round technical knockout.

Osaki faced Jyosei at RISE 160 on July 29, 2022, in a 56 kg catchweight bout. He won the fight by a first-round technical knockout, after knocking Jyosei down three times by the midway point of the opening round.

Return to bantamweight
Osaki faced Shiro at RISE World Series 2022 on October 15, 2022. They were initially expected to face each other in the semifinals of the 2021 RISE "Dead or Alive" bantamweight tournament, before the fight was cancelled due to Osaki missing weight. He lost the fight by unanimous decision, after an extra fourth round was fought.

Osaki faced Seiki Ueyama at RISE World Series / SHOOTBOXING-Kings 2022 on December 25, 2022. At the official weigh-ins, Ueyama missed weight by 1.5 kg, which resulted in him being deducted two points before the start of the fight and having to fight in bigger gloves. Osaki won the fight by unanimous decision, with one scorecard of 29–28 and two scorecards of 29–27.

Osaki faced Ryoga Terayama in the main event of RISE 165: RISE 20th Memorial event on February 23, 2023. The fight ended in a majority decision draw. Osaki landed an accidental low blow midway through the final round, which rendered his opponent unable to continue fighting and prompted the referee to call for a technical decision. The pair was booked to fight in an immediate rematch at RISE 168 on May 28, 2023. He won the fight by a second-round technical knockout.

Osaki faced Yugo Kato in a RISE Bantamweight title eliminator at RISE World Series 2023 - 2nd Round on August 26, 2023. He won the fight by unanimous decision, with scores of 30–29, 29–28 and 29–28.

RISE Bantamweight champion
Osaki challenged Masahiko Suzuki for the RISE Bantamweight (-55kg) title at RISE 174 on December 10, 2023. He won the fight by unanimous decision, with scores of 50–47, 50–47 and 50–48.

Osaki was expected Aiman Lahmar at RISE 178 on May 19, 2024. Lahmar withdrew from the fight on May 7, due to knee and hip injuries, and was replaced by Samvel Babayan. Babayan was himself forced to withdraw with visa issues and was replaced by Yodbuadang 3rdplacegym.

Professional

 * J-NETWORK
 * 2018 J-NETWORK Super Flyweight Champion


 * World Muay Thai Council
 * 2018 WMC Japan Super Flyweight Champion


 * Battle of Muay Thai
 * 2021 BOM Bantamweight Champion


 * RISE
 * 2023 RISE Bantamweight (-55kg) Champion

Amateur

 * 2013 Muay Thai Windy Super Fight -40kg Champion
 * 2014 All Japan Jr. Kick -45kg Champion
 * 2015 J-NETWORK All Japan A-league -53kg Winner & Spirit Award

Fight record
! style=background:white colspan=9 |Defending the RISE Bantamweight (-55kg) title.
 * - style="text-align:center; background:#"
 * 2024-08-31 || || align=left|🇯🇵 Ryunosuke Omori || RISE 181 || Tokyo, Japan || ||  ||


 * - style="text-align:center; background:#cfc"
 * 2024-05-19 || Win ||align=left|🇹🇭 Yodbuadaeng 3rdplaceGym || RISE 178 || Tokyo, Japan || KO (Left hook to the body) || 2 || 1:49

! style=background:white colspan=9 |Wins the RISE Bantamweight (-55kg) title. ! style=background:white colspan=9 |Ueyama missed weight by 1.5kg. He was deducted 2 points and had to wear bigger gloves.
 * - style="text-align:center; background:#cfc"
 * 2023-12-10 || Win|| align=left|🇯🇵 Masahiko Suzuki || RISE 174 || Tokyo, Japan || Decision (Unanimous) || 5 || 3:00
 * - style="text-align:center; background:#cfc"
 * 2023-08-26 || Win||align=left|🇯🇵 Yugo Kato || RISE World Series 2023 - 2nd Round || Tokyo, Japan || Decision (Unanimous) || 3 || 3:00
 * - style="background:#cfc;"
 * 2023-05-28 || Win||align=left|🇯🇵 Ryoga Terayama || RISE 168 || Tokyo, Japan ||TKO (3 Knockdowns) || 2 ||1:56
 * - style="background:#c5d2ea;"
 * 2023-02-23 || Draw ||align=left|🇯🇵 Ryoga Terayama || RISE 165: RISE 20th Memorial event || Tokyo, Japan || Tech. Decision (Majority) || 3 ||1:54
 * - style="background:#cfc;"
 * 2022-12-25|| Win ||align=left|🇯🇵 Seiki Ueyama || RISE WORLD SERIES / SHOOTBOXING-KINGS 2022|| Tokyo, Japan || Decision (Unanimous) ||3 ||3:00
 * 2022-12-25|| Win ||align=left|🇯🇵 Seiki Ueyama || RISE WORLD SERIES / SHOOTBOXING-KINGS 2022|| Tokyo, Japan || Decision (Unanimous) ||3 ||3:00

! style=background:white colspan=9 |Wins Battle Of MuayThai Bantamweight title. ! style=background:white colspan=9 |For the HOOST CUP -53kg title. ! style=background:white colspan=9 |Wins J-NETWORK Super Flyweight title. ! style=background:white colspan=9 |Wins the WMC Japan Super Flyweight title.
 * - style="text-align:center; background:#fbb"
 * 2022-10-15 || Loss ||align=left|🇯🇵 Shiro|| RISE WORLD SERIES 2022 || Tokyo, Japan || Ext.R Decision (Unanimous) || 4||3:00
 * - style="text-align:center; background:#cfc"
 * 2022-07-29|| Win ||align=left|🇯🇵 Jyosei || RISE 160 || Tokyo, Japan || TKO (Three knockdowns) || 1 || 1:35
 * - style="text-align:center; background:#cfc"
 * 2022-05-28|| Win ||align=left|🇯🇵 Yugo Kato || NO KICK NO LIFE || Tokyo, Japan || TKO (Doctor stoppage) ||4 ||2:20
 * - style="text-align:center; background:#cfc;"
 * 2022-03-27|| Win || align=left|🇯🇵 Tatsuto || RISE 156 || Tokyo, Japan || Decision (Unanimous) ||3||3:00
 * - style="text-align:center; background:#cfc;"
 * 2021-07-18||Win||align=left|🇯🇵 Azusa Kaneko || RISE WORLD SERIES 2021 - Dead or Alive Tournament, Reserve Fight || Osaka, Japan || Decision (Unanimous) ||3 ||3:00
 * - style="text-align:center; background:#cfc;"
 * 2021-04-11|| Win ||align=left|🇯🇵 Kaito Fukuda || BOM WAVE 04 – Get Over The COVID-19 || Yokohama, Japan || Decision (Unanimous) || 5 || 3:00
 * 2021-04-11|| Win ||align=left|🇯🇵 Kaito Fukuda || BOM WAVE 04 – Get Over The COVID-19 || Yokohama, Japan || Decision (Unanimous) || 5 || 3:00
 * - style="text-align:center; background:#cfc;"
 * 2021-01-30 || Win ||align=left|🇯🇵 Kyosuke || RISE 145 || Tokyo, Japan || KO (Low Kick)||2 ||
 * - style="text-align:center; background:#cfc;"
 * 2020-12-06 || Win ||align=left|🇹🇭 Sanchai TeppenGym|| BOM WAVE 03 ~ Get Over The COVID-19 || Yokohama, Japan || Decision (Split)  ||5 ||3:00
 * - style="text-align:center; background:#cfc;"
 * 2020-09-04 ||Win ||align=left|🇯🇵 Kazuya Okuwaki ||RISE 142|| Tokyo, Japan|| KO (High Kick) || 1 || 2:32
 * - style="text-align:center; background:#FFBBBB;"
 * 2019-11-04 || Loss||align=left|🇯🇵 Jin Mandokoro ||RISE 135|| Tokyo, Japan||Decision (Unanimous) || 3 || 3:00
 * - style="text-align:center; background:#CCFFCC;"
 * 2019-10-04 || Win ||align=left|🇯🇵 Takumi Hamada ||KNOCK OUT X REBELS|| Tokyo, Japan||Decision (Unanimous) || 3 || 3:00
 * - style="text-align:center; background:#CCFFCC;"
 * 2019-09-10 || Win ||align=left|🇹🇭 Kotchasarn Sor Jor Toipaedriew || Lumpinee Stadium|| Bangkok, Thailand|| KO (Left Hook to the Body) || 2 ||
 * - style="text-align:center; background:#CCFFCC;"
 * 2019-08-04 || Win ||align=left|🇯🇵 Naoki Ishikawa || KICK ORIGIN|| Tokyo, Japan|| KO (Left Uppercut) || 3 ||
 * - style="text-align:center; background:#FFBBBB;"
 * 2019-05-26 || Loss||align=left|🇯🇵 Koudai || HOOST CUP KINGS NAGOYA 6|| Nagoya, Japan || Ext.R Decision (Majority) || 4 || 3:00
 * - style="text-align:center; background:#CCFFCC;"
 * 2019-04-20 || Win ||align=left|🇯🇵 Yuya Kosaka || Norainu Matsuri 5 Mamoruna Semeru ! Haru Nanda|| Tokyo, Japan|| KO (Right Cross) || 2 || 1:12
 * - style="text-align:center; background:#FFBBBB;"
 * 2019-02-11 || Loss ||align=left|🇯🇵 Yoshiho Tane || KNOCK OUT 2019 WINTER || Tokyo, Japan|| TKO (Punches)|| 5 || 0:51
 * - style="text-align:center; background:#CCFFCC;"
 * 2019-01-16 || Win ||align=left|🇯🇵 Yoshiki Tane || ROAD TO KNOCK OUT Vol. 3|| Tokyo, Japan|| KO (Punches)|| 2 || 1:48
 * - style="text-align:center; background:#CCFFCC;"
 * 2018-12-15 || Win ||align=left|🇹🇭 Khotchasarn Wor.Wiwatnanon || Lumpinee Stadium || Bangkok, Thailand|| KO (Left Hook to the body)|| 2 ||
 * - style="text-align:center; background:#CCFFCC;"
 * 2018-10-20 || Win ||align=left|🇯🇵 Masanori Matsuzaki || J-KICK 2018～4th～ || Tokyo, Japan|| Decision (Unanimous)|| 5 || 3:00
 * - style="text-align:center; background:#CCFFCC;"
 * 2018-09-23 || Win ||align=left|🇯🇵 Satoshi Katashima || Muay Lok 2018 Challenge || Tokyo, Japan|| TKO (Left Elbow)|| 4 || 2:39
 * - style="text-align:center; background:#CCFFCC;"
 * 2018-08-19 || Win ||align=left|🇯🇵 Tatsuya Hibata || J-NETWORK J-KICK 3rd || Tokyo, Japan|| KO (Left Elbow)||2||
 * - style="text-align:center; background:#CCFFCC;"
 * 2018-07-15 || Win ||align=left|🇯🇵 MASA BRAVELY || Muay Lok 2018 Global || Tokyo, Japan|| Decision (Unanimous)|| 3 || 3:00
 * - style="text-align:center; background:#CCFFCC;"
 * 2018-05-20 || Win ||align=left|🇯🇵 Yuya Hayashi || HOOST CUP KINGS NAGOYA 4 || Nagoya, Japan||TKO|| 3 ||2:05
 * - style="text-align:center; background:#fbb;"
 * 2018-03-17 || Loss ||align=left|🇹🇭 Norangnoi Korsenchun|| Lumpinee Stadium || Bangkok, Thailand ||Decision || 5 || 3:00
 * - style="text-align:center; background:#CCFFCC;"
 * 2017-12-10 || Win ||align=left|🇯🇵 Mori|| J-NEXUS 2017～J-NETWORK 20th Anniversary～NIGHT || Tokyo, Japan ||KO || 2 ||
 * - style="text-align:center; background:#CCFFCC;"
 * 2017-09-30 || Win ||align=left|🇯🇵 Kazane || Hoost Cup KINGS NAGOYA 3|| Nagoya, Japan ||Decision (Unanimous)|| 3 || 3:00
 * - style="text-align:center; background:#CCFFCC;"
 * 2017-08-20 || Win ||align=left|🇹🇭 || Suk Wan Kingtong || Saraburi, Thailand || KO || 2 ||
 * - style="text-align:center; background:#CCFFCC;"
 * 2017-07-23 || Win ||align=left|🇯🇵 JIRO|| J-FIGHT & J-GIRLS 2017～J-NETWORK 20th Anniversary～5th || Tokyo, Japan ||KO (Left Middle Kick) || 1 || 1:29
 * - style="text-align:center; background:#CCFFCC;"
 * 2017-05-28 || Win ||align=left|🇯🇵 Masayoshi Kunimoto || HOOST CUP STAND FIGHTING NETWORK KING|| Nagoya, Japan ||Decision (Unanimous)|| 3 || 3:00
 * - style="text-align:center; background:#c5d2ea;"
 * 2017-03-05 || NC||align=left|🇯🇵 Atsumu ||Muay Lok 2017 1st|| Tokyo, Japan ||Doctor Stop (Head clash)|| 1 ||
 * - style="text-align:center; background:#CCFFCC;"
 * 2016-11-20 || Win ||align=left|🇯🇵 Takenari Izumi || HOOST CUP STAND FIGHTING NETWORK KING|| Nagoya, Japan ||TKO (Left Knee) || 1 ||2:15
 * - style="text-align:center; background:#FFBBBB;"
 * 2016-06-26 || Loss ||align=left|🇯🇵 Yuki Kojima || J-NETWORK J-FIGHT & J-GIRLS 2016 3rd|| Tokyo, Japan ||Decision (Majority) || 3 ||3:00
 * - style="text-align:center; background:#CCFFCC;"
 * 2016-05-05 || Win ||align=left|🇯🇵 Idomu Tateshima || J-NETWORK J-KICK 2016～Honor the fighting spirits～2nd|| Tokyo, Japan ||Decision (Unanimous) || 3 ||3:00
 * colspan=9 | Legend:
 * colspan=9 | Legend: