Full cast of Space Brothers

Hiroaki Hirata

Mutta Nanba (voice)

99 episodes

KENN

Hibito Nanba (voice)

99 episodes

Masayuki Katou

Kenji Makabe (voice)

99 episodes

Miyuki Sawashiro

Serika Itou / Mutta Nanba as a Boy (voice)

99 episodes

Masako Ikeda

Sharon Kaneko (voice)

99 episodes

Yuko Sanpei

Hibito Nanba as a Boy (voice)

99 episodes

Shô Ryûzanji

Tadashi Hoshika (voice)

99 episodes

Ryou Naitou

Yasushi Furuya (voice)

99 episodes

Shintaro Asanuma

Yamato Mizoguchi (voice)

99 episodes

Takanori Hoshino

Reiji Nitta (voice)

99 episodes