MAROOMS presents KNOCK OUT 2025 vol.3 took place on May 18, 2025, at Korakuen Hall in Tokyo, Japan, promoted by Knock Out. The main event features Shoji Otani defending his KNOCK OUT-BLACK Lightweight (62.5kg) title against Fumiya Osawa in a 3-round (plus 1 extension) title fight. Other key bouts include Kuntap Charoenchai vs. Yoshiro Tsuzaki for the KNOCK OUT-RED Super Welterweight (70kg) title and Hiroki Nakajima vs. Yuki for the KNOCK OUT-BLACK Super Welterweight (70kg) interim title.