He is a student of Class 3-A of Fumizuki Academy. He is good friends with Yūsaku, forming the "Tokonatsu duo." He has appeared in the OVA of the series along with Yuusaku, where he ate the sesame dumpling Himeji made and was hit twice with German Suplex. Although they spread some false rumors about Class 2-F's business, Akihisa and Yuuji managed to set them up by framing Shunpei as a pervert for making "lewd" moves in public. In the tournament, he, alongside Yuusaku, managed to face Akihisa and Yuuji in the finals tournament (and still wearing the bra Akihisa had put him). He cheated by throwing an eraser on Akihisa's shokanjuu as a distraction, giving him an advantage. Although the duo got the upper hand, they were defeated by the combined efforts of Akihisa and Yuuji. His shokanjuu wears a kimono under a coat with six feathers and wields a giant pipe. He and Yuusaku later appear in the second season.