sumo

Sumo is a form of competitive full-contact wrestling where a rikishi attempts to force his opponent out of a circular ring or into touching the ground with any body... Wikipedia

Focus: Clinch fighting
Hardness: Full contact
Country of origin: Japan
Ancestor arts: Tegoi
Descendant arts: Jujutsu, Jieitaikakutōjutsu
Olympic sport: No, but IOC recognized
Data source: DuckDuckGo