22 May 2015 - Singapore: Asia's largest mixed martial arts organization with a 90% market share, ONE Championship(ONE), made a triumphant return to Singapore with another spectacular evening of world-class mixed martial arts. ONE: WARRIOR'S QUEST delighted fans to a night of heart-thumping action, as the best fighters from all across Asia and the entire world went to battle inside the ONE cage. In the main event, Shinya Aoki defeated Koji Ando to remain the ONE Lightweight World Champion. Dejdamrong Sor Amnuaysirichok became the ONE Strawweight World Champion after beating Roy Doliguez of the Philippines.
Shinya "Tobikan Judan" Aoki retained his ONE Lightweight World Championship with a victory over Japanese compatriot Koji "The Commander" Ando.