On August 30, 2023, a 25-year-old Riku Masuda (3-0, 3 KOs) and a 27-year-old fellow Japanese boxer Seiya Tsutsumi (8-0-2, 7 KOs) met in the ring.
Masuda came in to the fight on a 3-fight win streak with a 100% KO rate, and was fighting after a gap of 3 months and 10 days. Tsutsumi was on a 3-fight win streak with a 70% KO rate, and fighting after a layoff of 5 months and 10 days.
Seiya Tsutsumi defeated Riku Masuda via unanimous decision in the 10-round bantamweight fight. Tsutsumi improves his record to 9-0-2, while Masuda adds a loss to his record at 3-1.