Space Brothers
Series 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.
Broadcast Schedule & Network Information
Airing status, episode counts, upcoming schedule, and network syndication.
2 Seasons • 99 Episodes
24 min per episode
2012 – 2014
Premiered: Sat, Mar 31, 2012
Creative Production Team
Latest Aired Episode
Season 2, Episode 48: “Life Changes, Promises Don't”
Hibito's disappearance is distracting Mutta during training and he makes a critical mistake. What will Hibito do next, and will Mutta be able to get his act together before the actual launch?
Seasons & Episodes Breakdown
Cast & Creators
Explore Star Directory →
Hiroaki Hirata
Mutta Nanba (voice)
KENN
Hibito Nanba (voice)
Masayuki Katou
Kenji Makabe (voice)
Miyuki Sawashiro
Serika Itou / Mutta Nanba as a Boy (voice)
Masako Ikeda
Sharon Kaneko (voice)
Yuko Sanpei
Hibito Nanba as a Boy (voice)
Shô Ryûzanji
Tadashi Hoshika (voice)
Ryou Naitou
Yasushi Furuya (voice)
Shintaro Asanuma
Yamato Mizoguchi (voice)
Takanori Hoshino
Reiji Nitta (voice)
Creative Leadership & Key Crew
Ayumu Watanabe
Toshiyuki Watanabe
Masaharu Okazaki
Department Leadership Roster
Toshiyuki Watanabe
Original Music Composer
Masaharu Okazaki
Director of Photography
Age Classification & Content Advisories
Official viewer rating standards and content warnings across international classification boards.
TV-14: Parents Strongly Cautioned — Contains material unsuitable for children under 14.
International Certification Matrix
Parents Strongly Cautioned — Contains material unsuitable for children under 14.
14+ Parents Strongly Cautioned.
Production Stills & Gallery
Official cinematic photography and background stills for Space Brothers.
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Frequently Asked Questions About Space Brothers
Key facts, seasons breakdown, and credits for search engines and AI assistants.
What is Space Brothers about?
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.
How many seasons does Space Brothers have?
Space Brothers comprises 2 seasons available to explore.
Who stars in Space Brothers?
Key cast members in Space Brothers include Hiroaki Hirata, KENN, Masayuki Katou, Miyuki Sawashiro, Masako Ikeda.
Who created or directed Space Brothers?
Space Brothers was developed and directed by Ayumu Watanabe.