Yuya Wakamatsu

is a Japanese mixed martial artist. He currently competes in the Flyweight division of ONE Championship, where he is the former ONE Flyweight World Champion.

Mixed martial arts career ONE Championship In the ONE debut, Wakamatsu faced Danny Kingad on September 22, 2018, at ONE: Conquest of Heroes. He lost the fight via unanimous decision.

ONE Flyweight World Grand Prix In the quarterfinal of the ONE Flyweight World Grand Prix, Wakamatsu faced Demetrious Johnson on March 31, 2019, at ONE: A New Era. He lost the fight via guillotine choke in round two.

Wakamatsu was scheduled to face Reece McLaren in a reserve bout on August 2, 2019, at ONE: Dawn of Heroes. However, McLaren replacing injured Kairat Akhmetov against Danny Kingad in a semifinal, and Wakamatsu faced Geje Eustaquio instead. He won the fight via first-round knockout.

Post Grand Prix Wakamatsu faced Kim Dae-hwan on October 13, 2019, at ONE: Century – Part 1. He won the fight via unanimous decision.

Wakamatsu faced Kim Kyu-sung on October 30, 2020, and aired on November 6, 2020, at ONE: Inside the Matrix 2. He won the fight via first-round knockout.

Wakamatsu faced Reece McLaren on April 7, 2021, and aired on April 21, 2021, at ONE on TNT 3. He won the fight via unanimous decision.

Wakamatsu faced Hu Yong on December 3, 2021, at ONE: Winter Warriors. He won the fight via unanimous decision.

Wakamatsu faced Adriano Moraes for the ONE Flyweight World Championship on March 26, 2022, at ONE: X. He lost the fight via guillotine choke in round three.

Wakamatsu was scheduled to face Xie Wei on September 29, 2022, at ONE 161. However, Xie pulled out for unknown reasons and was replaced by Wang Shuo. At the weigh-ins, Wang weighed in at 139.5 pounds, 4.5 pounds over the flyweight limit. Subsequently, the bout was scrapped after Wang pulled out from the event.

Wakamatsu faced Woo Sung-hoon on November 19, 2022, at ONE 163. At the weigh-ins, Wakamatsu weighed in at 139 pounds, 4 pounds over the flyweight limit. The bout proceeded at catchweight with Wakamatsu being fined 40% of his purse, which went to Woo. He lost the fight via technical knockout in round one.

The bout between Wakamatsu and Xie was rescheduled on July 15, 2023, at ONE Fight Night 22. At the weigh-ins, Wakamatsu weighed in at 135.5 pounds, 0.5 pounds over the flyweight limit and Wakamatsu was fined their purse of his purse, which went to Xie. He won the fight via technical knockout in round one.

Wakamatsu faced Danny Kingad in a rematch on January 28, 2024, at ONE 165. He won the fight via unanimous decision.

Wakamatsu faced Gilbert Nakatani on December 7, 2024, at ONE Fight Night 26. He won the fight via unanimous decision.

ONE Flyweight World Champion The rematch between Wakamatsu and Adriano Moraes for the vacant ONE Flyweight World Championship took place on March 23, 2025, at ONE 172. He won the title via technical knockout in round one and this win earned the $50,000 Performance of the Night bonuses.

Championships and accomplishments Mixed martial arts Pancrase Pancrase Neo Blood Tournament Flyweight Winner (2016) ONE Championship ONE Flyweight World Championship (One time; current)

Mixed martial arts record Loss

Avazbek Kholmirzaev KO (spinning back elbow) ONE Samurai 1

Tokyo, Japan Win

Joshua Pacio TKO (knees) ONE 173

Tokyo, Japan Win

Adriano Moraes TKO (punches) ONE 172

Saitama, Japan Win

Gilbert Nakatani Decision (unanimous) ONE Fight Night 26

Bangkok, Thailand Win

Danny Kingad Decision (unanimous) ONE 165

Tokyo, Japan Win

Xie Wei TKO (punches) ONE Fight Night 12

Bangkok, Thailand Loss

Woo Sung-hoon TKO (elbows and punches) ONE 163

Kallang, Singapore Loss

Adriano Moraes Submission (guillotine choke) ONE: X

Kallang, Singapore Win

Hu Yong Decision (unanimous) ONE: Winter Warriors

Kallang, Singapore Win

Reece McLaren Decision (unanimous) ONE on TNT 3

Kallang, Singapore Win

Kim Kyu-sung KO (punch) ONE: Inside the Matrix 2

Kallang, Singapore Win

Kim Dae-hwan Decision (unanimous) ONE: Century – Part 1

Tokyo, Japan Win

Geje Eustaquio KO (punch) ONE: Dawn of Heroes

Pasay, Philippines Loss

Demetrious Johnson Submission (guillotine choke) ONE: A New Era

Tokyo, Japan Loss

Danny Kingad Decision (unanimous) ONE: Conquest of Heroes

Jakarta, Indonesia Win

Mamoru Yamaguchi Decision (unanimous) Pancrase 297

Tokyo, Japan Loss

Senzo Ikeda TKO (knees and elbows) Pancrase 293

Tokyo, Japan Win

Shohei Masumizu TKO (punches) Pancrase 290

Tokyo, Japan Win

Takahiro Furumaki KO (punch) Pancrase 287

Tokyo, Japan Win

Yuki Uejima TKO (punches) Pancrase 285

Tokyo, Japan Win

Yusuke Ogikubo Decision (split) Pancrase 283

Tokyo, Japan Win

Kazuhisa Tanaka KO (knee to the body) Pancrase 280

Tokyo, Japan Win

Masayuki Watanabe TKO (punches) Pancrase 278

Tokyo, Japan Win

Naoki Tanada TKO (punches) Pancrase 276

Tokyo, Japan Win

Sadashi Hamamatsu TKO (punches) Pancrase 274

Kitakyushu, Japan Win

Yoshiya Shinba KO (punches) Fighting Network ZST: Challenge 148

Tokyo, Japan Loss

Yuto Sekiguchi KO (punches) Vale Tudo Japan in Osaka

Osaka, Japan