山田五十鈴

Natsu, the Foster Mother

木暮実千代

Keiko, the Mother-in-Law

新珠三千代

Kazuko, the Birth Mother

フランキー堺

Seiji, the Father

仲代達矢

Kensaku, the Engineer

Makoto Niki

The Boy

坂本武

Seitaro Nakahara, Seiji's father

三好栄子

Kayo Nakahara, Seiji's mother