Eternal young guy, Yuzo Kayama stars in this fifth installment of the Young Guy series. Young Guy returns to the swim team from the first movie, boards his rival Blue Guy's boat, and meets a young woman on a small island.
| Actor | Role |
|---|---|
 Yūzō Kayama田沼真一（若大将） | 田沼真一（若大将） |
 Yuriko Hoshi芦屋澄子 | 芦屋澄子 |
 Kunie Tanaka石山新次郎（青大）） | 石山新次郎（青大）） |
 Tatsuyoshi Ehara江口敏 | 江口敏 |
 Ichirō Arishima田沼久太郎 | 田沼久太郎 |
 Chōko Iida田沼りき | 田沼りき |
 Machiko Naka田沼照子 | 田沼照子 |
 Keiko Sawai酒井昌江 | 酒井昌江 |
 Kamatari Fujiwara佐平 | 佐平 |
 Noriko Shigeyama秋山悦子 | 秋山悦子 |
 Yōko Fujiyama大町英子 | 大町英子 |
 Kenji Sahara海江田 | 海江田 |
 Takamaru Sasaki武田教授 | 武田教授 |
 Meichō Soganoyaマーケット店長 | マーケット店長 |
 Kanzō UniNot listed | Not listed |
 Shōichi HiroseNot listed | Not listed |
 Hisaya ItoNot listed | Not listed |
 Takeo TabataNot listed | Not listed |
| GGorō ŌkiNot listed | Not listed |
| RRyuji KitaNot listed | Not listed |
 Takeshi TerauchiHimself | Himself |