In his first tournament of fourth year Elementary school, he heavily injured his opponent. From then on he wasn't allowed to appear on the stage of Elementary and Middle school sumo.
District Preliminary arc
Along side Kariya Shun they attend the district preliminary bout between Onimaru and Sada Mizuki. Observing the match they discuss each individual's fighting style and the possible outcome of the match.
Kanto Newcomer Tournament arc
- Kuze Sōsuke vs Kunisaki Chihiro (Kanto Newcomer Tournament)
- Kuze Sōsuke vs Gojō Yūma (Kanto Newcomer Tournament)
- Kuze Sōsuke vs Ushio Hinomaru (Kanto Newcomer Tournament)