The brother of an up-and-coming kendoka is mysteriously murdered while working on a new model of motorboat.
Mankichi Yamaarashi
Michiyo Amemiya
Kikuko Ohinata
Kenji Hoshikawa
Saburo Ohinata
Mari Takakura
Shizuko Inagaki
Hideki Inagaki
Iwakichi Mori
Yusaku Amemiya
