Arc 15Seido’s Spring Tournament Run
Kōshū refined his pitching and batting while Seido advanced through the Spring Tournament, defeating Tachikawa Private and Ichidai Third High. Seido then prepared to face Inashiro as Teito and Inashiro began their matchup.
- Kōshū impressed Okumura in the bullpen, then led Seido against Tachikawa Private and used his evolving Cutter as Seido won.
- Kōshū reviewed his mechanics and stamina with Ochiai Coach, while Kataoka Manager kept him on a carefully managed workload for the quarterfinals.
- Seido beat Kasuga Ichi, and Kōshū studied Ichidai Third High’s ace Amakuhisa Kousei before volunteering to pitch against them.
- Kōshū’s Slider challenged Seido’s hitters in practice, and he organized a pitchers’ meeting so the staff could prepare for Ichidai Third High.
- Kōshū entered Flow State to hit Amakuhisa’s pitch for a single, helping Seido score in the first inning of their quarterfinal.
- Seido took a 1–0 lead, and Kōshū hit a home run off Amakuhisa after Ichidai Third began reading his Slider.
- Kōshū asked to pitch the fifth inning and later struck out Hoshida in the seventh before Kataoka moved him to left field and gave Furuya the final two innings.
- Furuya helped Seido secure the victory over Ichidai Third, and Teito and Inashiro began their game on April 26.