Naoki Ishikawa

THE KNOCK OUT takes place on June 22, 2025, at the Yoyogi National Gymnasium Second Gymnasium in Tokyo, Japan. Key fights include the main event title rematch between Taimu Hisai and Ryusei, plus title bouts like Shogo Kuriaki vs. Kazuma Kuramoto, Isshi vs. Yuki Morioka, and Yota Shigemori vs. Kongnapa Weerasakreck.

RIZIN 31 live from the Pia Arena MM in Yokohama, Japan. The Main event will be a featherweight title match. The champion, Saito, will put the belt on the line for the first time when facing regional champion Juntaro Ushiku.