Ryo Matsuri (祭 遼, Matsuri Ryō; born May 27, 1971), known by the ring name Onryo (怨霊, Onryō) (sometimes stylized in romaji as ONRYO), is a Japanese professional wrestler and promoter. Matsuri, as Onryo, portrays a ghost wrestler who was killed after winning a cursed championship. He is known for his work in Frontier Martial-Arts Wrestling and Big Japan Pro Wrestling and is the founder of the Wrestling of Darkness 666 (666) promotion, who he co-owned with Qp-Crazy frontman Yasuhiro "Crazy SKB" Sakano until 2018.
Source: “Onryo (wrestler)”, English Wikipedia (CC BY-SA 4.0), excerpt