This film begins with a teacher describing to his students how brave the crew was which died as result of Japan's first submarine accident. The film then follows two of the pupils, one becomes a submarine captain and the other designs submarines.
| Actor | Role |
|---|---|
| KKoji NakataNot listed | Not listed |
 Shirô IzomeNot listed | Not listed |
 Ichirō IzawaNot listed | Not listed |
 Bontarō MiakeNot listed | Not listed |
| SShiko SaitoNot listed | Not listed |
| EEiran YoshikawaNot listed | Not listed |
| FFumio ŌmachiNot listed | Not listed |
| KKansho YoshiiNot listed | Not listed |
| RRyuji KitaNot listed | Not listed |
 Eiji OshimotoNot listed | Not listed |
| YYukichi KamishiroNot listed | Not listed |
 Akihiko KatayamaNot listed | Not listed |
| TTetsuo ItoNot listed | Not listed |
| CChiyoko KomineNot listed | Not listed |
| YYoko BenisawaNot listed | Not listed |
 Hiroko MachidaNot listed | Not listed |
| TTetsuo MishimaNot listed | Not listed |
| SShiro TakahashiNot listed | Not listed |
| EEmiko InoueNot listed | Not listed |
| HHisako InoueNot listed | Not listed |
 Hisako TakihanaNot listed | Not listed |
 Akiko KazamiNot listed | Not listed |
| KKôko YamadaNot listed | Not listed |