Watch LookMovie. ONE Samurai 1 was a combat sports event produced by ONE Championship that took place on April 29, 2026, at Ariake Arena in Tokyo, Japan. An interim ONE Flyweight Kickboxing World Championship bout between Former ONE Flyweight Muay Thai World champion Rodtang Jitmuangnon and Former 3 Division K-1 Champion Takeru Segawa headlined the event.