Ryujin Nasukawa (born May 16, 2006) is a Japanese kickboxer. He is the reigning RISE Flyweight (-51.5 kg) champion and ISKA K-1 World Strawweight champion. As of October 2024, he was the #10 ranked -53 kg kickboxer in the world according to Beyond Kickboxing. Kickboxing career. Early career. Nasukawa made his professional debut on April 4, 2022, at RISE ELDORADO 2022 where he defeated Naoki Kasahara by unanimous decision. For his second professional fight Nasukawa was scheduled to face Rui Okubo on the exceptional card THE MATCH 2022 on June 19, 2022, at the Tokyo Dome. Nasukawa lost the fight by unanimous decision. Nasukawa took part in a four-man one night tournament called "New Warriors" on February 23, 2023, at RISE 166. In the semifinals he faced Momu Tsukamoto who defeated him by unanimous decision. On August 26, 2023, Nasukawa faced Jin at RISE WORLD SERIES 2023 - 2nd Round. He won the fight by unanimous decision. On December 16, 2023, Nasukawa faced Ryutaro at RISE WORLD SERIES 2023 Final Round. He won the fight by doctor stoppage in the third round. On March 17, 2024, Nasukawa faced Tenshi Matsumoto at RISE ELDORADO 2024. He won the fight by unanimous decision. On June 15, 2024, Nasukawa faced Momu Tsukamoto at RISE WORLD SERIES 2024 OSAKA. He won the fight by spit decision. RISE Flyweight champion. Nasukawa was scheduled to challenge Riku Kazushima for his RISE Flyweight title on November 23, 2024, at RISE 183. Nasukawa faced Petmai MC.SuperlekMuaythai at RISE WORLD SERIES 2024 Final on December 21, 2024. He won the fight by a second-round knockout. Nasukawa faced Hamada Azmani for the inaugural ISKA K-1 World Strawweight (-51.5 kg) title at RISE WORLD SERIES YOKOHAMA 2025 on June 21, 2025. He won the fight by unanimous decision to capture the title. Mixed martial arts career. Nasukawa made his mixed martial arts debut at Rizin 45 on December 31, 2023, against Jongmin Shin. He won the fight by second-round knockout. Titles and accomplishments. Professional. Awards Kickboxing record. ! style=background:white colspan=9 | ! style=background:white colspan=9 |