Watch Space Brothers Online (2012)

Where to watch “Space Brothers” (2012) online legally? See US streaming options first, plus English-region fallbacks.

Space Brothers first aired in 2012 • originally associated with Nippon TV • 2 seasons • 99 episodes • around 24 minutes per episode • status: Ended.

If you searched for “watch Space Brothers online” (2012), the safest approach is to verify legal availability in your region (US first, then English-region fallbacks).

It sits in the Animation, Drama, Sci-Fi & Fantasy space, which helps set expectations for tone and pacing.

Ratings vary by audience taste—check the synopsis and cast to see if it matches what you like.

This page includes season navigation, episode list, cast, trailer (when available), and legal provider hints to help you decide quickly.

Synopsis

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.

Keywords

space, based on manga, astronaut, inspiring story, anime, brothers.

Stills

Similar series

Galaxy Express 999, Irina: The Vampire Cosmonaut, Sonny Boy, Gachiakuta, Astra Lost in Space, Star Blazers: Space Battleship Yamato 2199, Tengoku Daimakyo, Gurren Lagann.

Main cast

Hiroaki Hirata

as Mutta Nanba (voice)

KENN

as Hibito Nanba (voice)

Masayuki Katou

as Kenji Makabe (voice)

Miyuki Sawashiro

as Serika Itou / Mutta Nanba as a Boy (voice)

Masako Ikeda

as Sharon Kaneko (voice)

Yuko Sanpei

as Hibito Nanba as a Boy (voice)

Shô Ryûzanji

as Tadashi Hoshika (voice)

Ryou Naitou

as Yasushi Furuya (voice)

Shintaro Asanuma

as Yamato Mizoguchi (voice)

Takanori Hoshino

as Reiji Nitta (voice)

Official trailer

There’s no trailer available for this series right now.