Isuzu Yamada

Natsu, the Foster Mother

Michiyo Aratama

The Real Mother

Frankie Sakai

Seiji, the Farher

Tatsuya Nakadai

The Engineer

Takeshi Sakamoto

Seitaro Nakahara, Seiji's father

Eiko Miyoshi

Kayo Nakahara, Seiji's mother

Haruo Tanaka