Ryūsei Matsumoto (born May 14, 1998) is a Japanese professional boxer. He has held the World Boxing Organization (WBO) interim mini-flyweight title since September 2026. He also previously held the World Boxing Association (WBA) (Regular version) mini-flyweight title from 2025 to 2026.
Source: “Ryūsei Matsumoto”, English Wikipedia (CC BY-SA 4.0), excerpt