TV-14Nippon TV8.1(23)

Space Brothers

Name: Space Brothers
Director: Ayumu Watanabe
Genre: Animation, Drama, Sci-Fi & Fantasy
Released: 2012-03-31
Rating: 8.1

宇宙兄弟

AnimationDramaSci-Fi & Fantasy

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2012

2 Seasons

99 Episodes

Ended

TV-14

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.

#space#based on manga#astronaut#inspiring story#anime#brothers

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)

Seasons

Season 1

51 episodes2012

Season 2

48 episodes2013

Episodes

Season 1

See all 51episodes →

Little Brother Hibito and Big Brother Mutta

Mar 31, 201224m

The year 2006. Two brothers, Nanba Mutta (age 12) and Hibito (age 9), happen to spot a UFO headed for the moon. The experience inspires them to make a certain promise.

My Shining Star

Apr 7, 201224m

With his mother's assistance and Hibito's encouragement, Mutta has been accepted for the New Astronaut Selection Exam. However, unsure of his next step, he visits Sharon, who works at a nearby observatory. After receiving advice from Sharon, Mutta is finally able to make up his mind.

The Man with the Advantage and the Running Female Doctor

Apr 14, 201224m

After advancing to the second exam, Mutta realizes that the other applicants are much better prepared than he is. Desperate to prove himself, he stakes everything on the lung capacity test, as he has confidence in his trumpet-trained lungs. However, as the other applicants drop out, he finds himself in a heated battle with Itou Serika. Who will come out on top?

Next to Hibito

Apr 21, 201224m

After a long week, only the final interview remains in the second JAXA exam. Mutta is drawing attention as Nanba Hibito's older brother, but he insists he won't spend his entire life as Nanba Hibito's big brother.

Days of Missing

Apr 28, 201224m

After completing the second JAXA exam, Hibito invites Mutta for a free trip to Houston, Texas, through NASA's family support program. Upon arrival, he finds himself chased by a pug named Apo, and is then reunited with Hibito. However, Hibito expresses disappointment.

Et Cetera in My Head

May 5, 201224m

Mutta has arrived in America, but he's off to a rocky start with Hibito. Meanwhile, his future as an astronaut is in jeopardy because the headbutt incident has been brought to JAXA's attention.

Dear Hibito

May 12, 201224m

After learning that his former boss has told JAXA about the headbutt incident, Mutta has given up hope on passing the exam. To cope, Mutta falls back on his childhood habit of multitasking like crazy when something bad happens.

Smoky Heaven

May 19, 201224m

When the robber known as the fire extinguisher man strikes the restaurant where Mutta is, he's in trouble. But once the dust settles, Mutta has become a national hero for capturing the criminal. However, it appears there's more to the story.

Where does Space Brothers rank today?

Space Brothers is #579 on the CineFlixo Daily Streaming Charts today.

Highest: #579
Top 10: 0 days
Top 100: 0 days

Watch Space Brothers Online Free — All Episodes in HD

Stream Space Brothers online free in HD on CineFlixo. A highly acclaimed animation, drama, and sci-fi & fantasy series originally produced in Japonés and released in 2012, it's earned a solid 8.1/10 from 23 viewers worldwide.

About Space Brothers

Space Brothers Cast and Characters

The cast features 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)), and Masako Ikeda (as Sharon Kaneko (voice)). Their performances are a major reason Space Brothers has built such a passionate audience.

Where to Watch Space Brothers Online

On CineFlixo you can watch Space Brothers free — no account, no credit card, no ads in the middle of the show. We stream the full series in 720p / 1080p HD, with subtitles when available, on any device: phone, tablet, laptop, or smart TV browser.

▶ Watch Space Brothers Now

Why People Are Watching Space Brothers

There's a reason Space Brothers keeps showing up on "must-watch" lists. What makes it work is emotional weight that hits where it counts and world-building that respects the audience's intelligence. If you enjoy Japonés storytelling that doesn't follow the same tired beats, this is the kind of show you'll end up recommending to friends.

Frequently Asked Questions about Space Brothers

Where can I watch Space Brothers online for free?

You can watch Space Brothers online free on CineFlixo. Just open the page and hit play — no signup, no subscription, full HD streaming on phone, tablet, or desktop.

How many episodes does Space Brothers have?

Space Brothers has 99 episodes across 2 seasons. All episodes are available to stream right here on CineFlixo.

Is Space Brothers good? What's the rating?

Space Brothers holds a 8.1/10 rating based on 23 reviews — genuinely excellent.

Who is in the cast of Space Brothers?

The main cast includes Hiroaki Hirata, KENN, Masayuki Katou, and Miyuki Sawashiro, plus a strong supporting ensemble.

Is Space Brothers available in Japonés?

Yes — Space Brothers was originally produced in Japonés and that's the version you'll stream here on CineFlixo. English subtitles are provided when available.

When was Space Brothers released?

Space Brothers first aired in 2012.

Do I need an account to watch Space Brothers on CineFlixo?

No. CineFlixo is free and you can watch Space Brothers without creating an account. Sign-up is optional — only useful if you want a personal Watchlist or to comment on episodes.

Similar Series You Might Like

If you enjoyed Space Brothers, check out Silver Fang: The Shooting Star Gin, The Maid I Hired Recently Is Mysterious, Kakafukaka, The Brave of Legend Da-Garn, and Galaxy Devastator.

Frequently Asked Questions

Where can I watch Space Brothers for free?

You can watch Space Brothers online for free on CineFlixo. All 99 episodes across 2 seasons are available to stream in HD without a subscription, signup, or paywall. Just open the show page and press play.

How many seasons and episodes does Space Brothers have?

Space Brothers currently has 2 seasons and a total of 99 episodes. The series status is "Ended", so the episode count may grow as new seasons are released. You can browse the full episode list on CineFlixo and continue watching from where you left off.

What is Space Brothers about?

In which language is Space Brothers originally available?

Space Brothers was originally produced in JA. On CineFlixo the show is available in its original JA audio. Check the player options on the watch page for available subtitle tracks.

When was Space Brothers first released?

Space Brothers first premiered on March 31, 2012 (2012). The series has since concluded its run.