Ryō Matsuri (born May 27, 1971), better known by the ring name Onryo or ONRYO, is a Japanese professional wrestler and promoter. As Onryo, Matsuri portrays a ghost wrestler who was killed after winning a cursed championship. He is known for his work in Frontier Martial-Arts Wrestling (FMW) and Big Japan Pro-Wrestling (BJW) before founding Wrestling of Darkness 666 in 2003, which he co-owned with Qp-Crazy frontman Yasuhiro "Crazy SKB" Sakano until 2018.