Sentarou Kawabuchi (川渕 千太郎 Kawabuchi Sentarō ) is a deutragonist of the Kids on the Slope series. He's usually referred to as Sentarou, but also known infamously as "East High's Kawabuchi." He is a jazz drummer who refuses to acknowledge other genres of music, a high school student and a delinquent, who often gets in fights.
Sentarou has short, spiky hazel hair and brown eyes, with pale skin. He has a strong jawline and a muscular frame. He has a small 'X' shaped scar under his left eye, and is sometimes seen with an adhesive bandage over his nose, and/or his left eyebrow.