Kira Matsutani

is a Japanese kickboxer, currently competing in the atomweight division of K-1, where she is the former K-1 Women's Atomweight Champion.

As of August 2023 she was the #10 ranked pound-for-pound women kickboxer in the world according to Combat Press.

Kickboxing career RISE Matsutani made her professional debut against Chizuru Nanase at NJKF 2019 2nd on June 2, 2019. She won the fight by unanimous decision, with all three judges awarding her a 30–28 scorecard.

Matsutani made her RISE promotional debut against fellow debutante Koyuki Miyazaki at RISE GIRLS POWER on November 8, 2019. The fight was ruled a split decision draw. Two of the judges scored the fight 30–29 for Matsutani and 30–28 for Miyazaki respectively, while the third ringside official scored the fight an even 29–29.

Matsutani faced Mari Kamikariya in a -44 kg catchweight bout at Stand up Kickboxing Vol.1 on December 22, 2019. She won the fight by unanimous decision, with all three ringside officials awarding her a 30–26 scorecard.

Matsutani faced the debuting Arina Kobayashi at RISE Girls Power 2 on February 11, 2020. The fight was ruled a split decision draw. Matsutani next faced Miyu Sakata at RISE GIRLS POWER 3 on September 20, 2020. She won the fight by unanimous decision, sweeping all three rounds with all three judges.

K-1 Matsutani faced Yuri Morikawa in her Krush debut at Krush 130 on October 31, 2021. She won the fight by unanimous decision, with three scorecards of 30–26. Matsutani next faced Satomi Toyoshima at Krush 134 on February 20, 2022. She likewise won the fight by unanimous decision.

On May 23, 2022, it was announced that Matsutani would be one of four women to take part in the K-1 Women's Atomweight Grand Prix, held to determine the inaugural K-1 champion at the weight, at K-1: Ring of Venus on June 25, 2022. She was eliminated in the tournament semifinals by Miyuu Sugawara, who defeated Matsutani by majority decision to hand her her first professional loss.

Matsutani faced Yu at Krush 143 on November 26, 2022. She won the fight by split decision. Matsutani next faced Ga Yeon Won at Krush Ring of Venus on April 8, 2023. She won the fight by unanimous decision.

Matsutani faced the former K-1 Women's Atomweight champion Phayahong Ayothayafightgym at K-1 World GP 2023 on July 17, 2023. She won the fight by unanimous decision, after an extra fourth round was contested.

Matsutani was expected to face Mako Yamada for the vacant Krush Women's Atomweight Championship at Krush 155 on November 25, 2023. Yamada withdrew with a hand fracture on November 8, and was replace by Nana Okuwaki. She won the fight by unanimous decision.

Matsutani faced Jung Yujung at K-1 World MAX 2024 - World Championship Tournament Final on July 7, 2024. She won the fight by unanimous decision.

Matsutani was scheduled to defend her Krush Women's Atomweight title against Gabrielle De Ramos at Krush 167 on November 16, 2024. The bout became a non title fight after De Ramos missed weight by 150g. She won the fight by a first-round knockout, the first stoppage victory of her professional career.

Matsutani faced Mafia Petchmongkoldee in the semifinals of the K-1 Women's Atomweight Grand Prix at K-1 World MAX 2025 on February 9, 2025. She won the fight by unanimous decision. In the final, Matsutani defeated Aki Suematsu by majority decision to win the vacant K-1 Women's Atomweight Championship.

Matsutani made her first K-1 Women's Atomweight Championship defense against Aki Suematsu at K-1 World MAX 2025 - 70kg World Tournament Opening Round on September 7, 2025. She won the fight by split decision, after an extra fourth round was contested.

Matsutani made her second K-1 Women's Atomweight Championship defense against Veronica Rodriguez at K-1 World GP 2026 -90kg World Tournament on February 8, 2026. She lost the fight by unanimous decision, suffering a knockdown in the third round.

On January 23, 2026, Matsutani vacated the Krush Women's Atomweight Championship in order to focus on her K-1 Championship.

Championships and accomplishments Amateur BigBang 2017 Bigbang women -40kg Champion 2018 Bigbang women -45kg Champion (one defense) New Japan Kickboxing Federation 2019 NJKF EXPLOSION women -46kg Champion Professional Krush 2023 Krush Women's Atomweight Champion

K-1 2025 K-1 Women's Atomweight (-45kg) Champion One successful title defense

Fight record

Amateur record 2019-03-10 Win Kiho Kohata NJKF EXPLOSION 20 Tokyo, Japan Decision 3 1:30 2018-12-09 Win Kiho Kohata NJKF EXPLOSION 18 Tokyo, Japan Decision 2 1:30 2018-11-04 Win Narumi Hen Bigbang amateur 49 Tokyo, Japan Decision (Unanimous) 3 1:30 2018-07-15 Win Bigbang the Future Sono 21 Tokyo, Japan Decision (Unanimous) 3 1:30 2018-04-08 Loss Riri Nasukawa Bigbang the Future Sono 20 Tokyo, Japan Decision (Unanimous) 3 1:30 2018-02-04 Win Kiho Kohata NJKF DUEL.13 Tokyo, Japan Decision (Unanimous) 2017-11-22 Loss Megami Tagawa SHOOT BOXING BATTLE SUMMIT-GROUND ZERO TOKYO 2017 Tokyo, Japan Decision (Unanimous) 3 2:00 2017-09-03 Win Rika Aimi Bigbang amateur 42 Tokyo, Japan Decision (Unanimous) 3 1:30 2017-07-02 Loss Kirato Hakkaku NJKF EXPLOSION 11 Tokyo, Japan Decision 2 1:30 2016-10-30 Draw Kirato Hakkaku NJKF EXPLOSION 7 Tokyo, Japan Decision 2 1:30 2016-08-28 Loss Haruyuki Tanitsu NJKF EXPLOSION 6 Tokyo, Japan Decision 2 1:30 2016-05-15 Loss Haruyuki Tanitsu NJKF EXPLOSION 5 - Championship Tournament, Semifinal Tokyo, Japan Decision 2 1:30 2016-02-07 Draw Keishin Watanabe NJKF EXPLOSION 4 Tokyo, Japan Decision 2 1:30 2016-02-07 Win Ruito Sugiyama NJKF EXPLOSION 4 Tokyo, Japan Decision 2 1:30 2015-11-01 Draw Ryujin Nasukawa NJKF EXPLOSION 3 Tokyo, Japan Decision 2 1:30 2015-07-05 Win Ryoma Sakurai NJKF EXPLOSION 2 Tokyo, Japan Decision 2 1:30 2015-07-05 Win Ruito Sugiyama NJKF EXPLOSION 2 Tokyo, Japan Decision 2 1:30 Legend: