Josephina the Whale

Naomi Jinbo

Santiago 'Santi' Costa (voice)

Kazue Takahashi

Josephina (voice)

Takashi Tanaka

Rafael Costa - Santi's father (voice)

Toshiko Sawada

María de Costa - Santi's Mother (voice)

Tomiko Suzuki

Rosa Costa - Santi's sister (voice)

Yoshiko Matsuo

Celia - Santi's best friend (voice)

Chiyoko Kawashima

Benita - Maid (voice)

Natsuko Kawaji

Santi's Grandmother (voice)