Mamoru Yamaguchi
Japanese martial artist
山口守
- Born
- 29 May 1977, Kawasaki
- Citizenship
- Japan
- Sport
- mixed martial arts
- Occupation
- mixed martial arts fighter, kickboxer
- Height
- 162 cm (5 ft 4 in)
Mamoru Yamaguchi (born May 29, 1977) is a Japanese mixed martial artist who competes in Pancrase. He is the former Shooto Bantamweight (123 lb) Champion, former Shooto Featherweight (132 lb) Champion, former Pancrase Flyweight Champion, as well as a former King of the Cage Junior Flyweight Champion. Mamoru is known for his counter striking and his trilogy with the former Shooto Bantamweight Champion Shinichi Kojima.
He has been consistently ranked as one of the top flyweight in the world by Sherdog's Official Mixed Martial Arts Rankings. He is considered, by Fight Matrix, to be the third best flyweight in the history of mixed martial arts.
His afro is a tribute to Japanese boxing legend, Yoko Gushiken.
External links
Facts from Wikidata Q11466757 (CC0); quoted introduction from English Wikipedia (CC BY-SA 4.0). Data retrieved 2026-10-22.
Data: Wikidata (CC0 1.0); Wikipedia (English) (CC BY-SA 4.0). Retrieved 2026-10-22.