Shoyo High School is considered the main rival of Kainan. The team was seeded first in their respective division during the Interhigh Tournament, and is the only team so seeded not to make it into the final four because of their loss to Shohoku. The height of Shoyo's players is among the tallest in Kanagawa. However, their one weakness is the lack of a dedicated coach with Kenji Fujima playing the roles of both coach and point guard.