Space Brothers

Overview

When they were young, the brothers Mutta and Hibito promised each other they would become astronauts. Now, in 2025, Hibito has followed his dream to become the first Japanese on the moon, but Mutta has just been fired from his job. His brother reminds him of their childhood promise, and Mutta decides once again to aim for space.

Seasons

Specials

3 episodes

Season 1

51 episodes

Season 2

48 episodes

Cast

Hiroaki Hirata

Mutta Nanba (voice)

Miyuki Sawashiro

Mutta Nanba (voice)

KENN

Hibito Nanba (voice)

Masayuki Katou

Kenji Makabe (voice)

Miyuki Sawashiro

Serika Itou (voice)

Masako Ikeda

Sharon Kaneko (voice)

Yuko Sanpei

Hibito Nanba (voice)

Shô Ryûzanji

Tadashi Hoshika (voice)

Ryou Naitou

Yasushi Furuya (voice)

Shintaro Asanuma

Yamato Mizoguchi (voice)