Jūzō Kumada (熊田重蔵 Kumada Jūzō, くまだ じゅうぞう Kumada Jūzō) is a third year student of Torashima Industries IV High School and a member of the school Judo club. He first appears in Downtown Nekketsu Kōshinkyoku: Soreyuke Daiundōkai. He is the eldest son of the owner of a rice grain shop and influenced by his grandfather, aims to become the best judoka. Although he hates bullies, he dislikes weaklings who make no effort to get stronger even more so.
- Clifford "Barns" Barnsworth in Crash 'n The Boys Street Challenge.
- Ted in River City Ransom EX.
- Swole in River City: Tokyo Rumble.