Sugata Sanjūrō (姿 三十朗 Sugata Sanjūrō, すがた さんじゅうろう Sugata Sanjūrō) is a 2nd Year student of Nekketsu High School who was first introduced in Downtown Nekketsu Kōshinkyoku: Soreyuke Daiundōkai.
The self-acclaimed disciple of Kunio, Sugata respects him and seriously considers him a teacher. Although he is described as simple-minded and has poor scouting skills, one of his main strengths is his fiery passion. Because of his family influence, he hates villains and is dedicated to fighting them, no matter how strong they are.
- In Crash 'n the Boys: Street Challenge, Sugata was renamed Rico "Cheese" Romano. Alterations were made to his hair.
- In River City Ransom EX, Sugata was renamed Gary.
- Oddly, in River City Ransom: Underground, Sugata's face is used for some of the enemies on The Squids, The Cowboys and The Plague gangs that appear in the game's flashback.