Sanjūrō Sugata (姿 三十朗 Sugata Sanjūrō, すがた Sugata) is a 2nd Year student of Nekketsu High School and a fictional character in Kunio-kun series. He first debuted 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, a member of Team Southside High School. 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.