Nagareyama Senior 流山シニア

First introduced: Volume 23, chapter 227.
Acted as kantoku of the U-15 Japan Representative team.

First Appearance: Volume 4, Chapter 28
Member of the U-12 Japan Representative team and U-15 Japan Representative team.
Considered to be the top pitcher of his generation, currently undefeated in official matches.

• Throw Left・Right
• Year 1 (first-year student):
  • Position: Pitcher
• Year 3 (third-year student):
  • Position: Pitcher (ace)
• Intends to attend Nagareyama Daiichi High School (流山第一高校) and has invited some of his current team members to apply for general admission, with the dream of buidling a high school team that would take them to Koshien.

First Appearance: Volume 4, Chapter 28

• Year 1 (third-year student):
  • Position: Catcher
• Year 2-3 (alumni):
  • Currently studying at Ouka High School.