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Space Brothers

2012 ★ 8.1 2 seasons 99 eps TV-MA
Animation
Drama
Sci-Fi & Fantasy

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.

Where to watch Space Brothers

Space Brothers is available to stream on Nabby via 6 verified sources, aggregated from publicly available embed providers. The animation has 2 seasons and 99 total episodes, rated 8.1/10 by 24 viewers.

Last verified: · Source: TMDB

Episodes 99 total across 2 seasons

51 episodes20123 watched
S1 · E1
24m
▶
Little Brother Hibito and Big Brother Mutta✓
Mar 31, 2012
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.
S1 · E2
24m
▶
My Shining Star✓
Apr 7, 2012
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.
S1 · E3
24m
▶
The Man with the Advantage and the Running Female Doctor✓
Apr 14, 2012
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?
S1 · E4
Up next
▶
Next to Hibito✓
Apr 21, 2012
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.
S1 · E5
24m
▶
Days of Missing✓
Apr 28, 2012
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.
S1 · E6
24m
▶
Et Cetera in My Head✓
May 5, 2012
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.
S1 · E7
24m
▶
Dear Hibito✓
May 12, 2012
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.
S1 · E8
24m
▶
Smoky Heaven✓
May 19, 2012
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.
S1 · E9
24m
▶
Individual Resolve✓
May 26, 2012
After passing the second JAXA exam, Mutta returns to Japan for the third. He's happy about the exam result, but on the flight back, a nightmare leaves him rattled. This is due to the letters from Hibito that he discovered before leaving.
S1 · E10
24m
▶
Running Bus✓
Jun 2, 2012
Mutta has learned that Kenji and Serika have strong reasons to become astronauts, while Mutta is simply trying to achieve a childhood dream. This causes Mutta to begin to question himself.
S1 · E11
24m
▶
Trapped Rivals✓
Jun 9, 2012
The third exam will take two weeks. Mutta and the other candidates are transported via sealed bus to a large, barren facility. Then they are led to an area that is known as the last room.
S1 · E12
24m
▶
My Name Is Itou Serika✓
Jun 16, 2012
The fifteen remaining candidates have been divided into three teams of five. Each team will spend two weeks inside a sealed box, while completing various tasks. The first task is to determine the time.
S1 · E13
24m
▶
3-D Ant✓
Jun 23, 2012
The sealed box teams are assigned more tasks. These include Running Math, five minutes of mental math while running, and a typing test. Next, they're asked to write a letter of protest to a journalist who is criticizing government funding for space exploration.
S1 · E14
24m
▶
Broken Glasses and the Sole of the Foot✓
Jun 30, 2012
After five days in their sealed boxes, each team is exhibiting a pronounced personality. Mutta's Team A is rowdy, while Team C is quiet. However, Kenji's Team B appears to be a little gloomy.
S1 · E15
24m
▶
Let's Talk About Space✓
Jul 7, 2012
The exam in the sealed box is halfway over. Mutta's Team A suffered an accident when Fukuda's glasses were broken. But Furuya, the one who broke them, requested a new pair. Meanwhile, Team B must deal with an alarm going off in the middle of the night.
S1 · E16
24m
▶
Alarm, but No Clock✓
Jul 14, 2012
The third exam is halfway over. Mutta works on a completely white puzzle as he ponders why Fukuda-san would break the only clock in the sealed box.
S1 · E17
24m
▶
The Culprit Is in the Room✓
Jul 21, 2012
The third exam inside the sealed boxes has been underway for ten days. Each team has been experiencing unexpected problems, such as broken clocks and mysterious alarms that ring in the middle of the night. However, Mutta soon realizes who is actually responsible.
S1 · E18
24m
▶
Roo-ra! Kenji!✓
Jul 28, 2012
The candidates have only a few days left in the sealed boxes. JAXA has been using green cards to create trouble, gauging each member's ability to respond to stress and trouble.
S1 · E19
24m
▶
The Day Before Goodbye✓
Aug 4, 2012
The teams have two days left in the sealed boxes. Mission Control has deliberately not given certain members of Kenji's Team B any green cards, leading to paranoia. Meanwhile, in Team A, Mutta announces that he has good news, bad news, and dicey news.
S1 · E20
24m
▶
The Worst Possible Punishment✓
Aug 11, 2012
It's their final day in the sealed box. Mutta has enjoyed his two weeks with the team, and he wishes to avert ruining their bond, as they make their final decision.
S1 · E21
24m
▶
A Long-Awaited Glimpse of the Sky✓
Aug 18, 2012
With the third exam finally over, Furuya takes the opportunity to visit the man who made his dream possible.
S1 · E22
24m
▶
Working on the Dream✓
Sep 1, 2012
The third astronaut selection exam has finally ended. Team A used rock-paper-scissors to select two members. Whose dreams are still alive?
S1 · E23
24m
▶
Father, Son, and Mutta Claus✓
Sep 8, 2012
Mutta has been picked to go to Houston for the final astronaut selection exam. But because his selection means that Kenji wasn't chosen, he has mixed feelings.
S1 · E24
24m
▶
The Worst Possible Interviewer✓
Sep 15, 2012
The final exam is set to take place in two months. Mutta heads to Houston, ahead of the other candidates to look after Apo and tour the Johnson Space Center. Meanwhile, Hibito is training hard for his lunar mission.
S1 · E25
24m
▶
Sonic Little Brother Training Big Brother✓
Sep 22, 2012
With the final astronaut selection exam coming up, Mutta heads to Houston. However, Jennifer has some ominous news.
S1 · E26
24m
▶
Painful Interview✓
Sep 29, 2012
Seven days remain before Hibito takes off on a journey to become the first Japanese person to walk on the moon. Meanwhile, Mutta prepares for the final astronaut selection exam at Johnson Space Center.
S1 · E27
24m
▶
One Question✓
Oct 6, 2012
The final NASA interview was a decoy to trick the candidates into relaxing, so the astronauts could evaluate them. However, the candidates have yet to realize this.
S1 · E28
24m
▶
Miracle of Doha✓
Oct 13, 2012
With four days before the launch, Mutta and his family arrive at Kennedy Space Center for one last meal with Hibito before he heads into space. Mutta uses this opportunity to hand Hibito a very special DVD-R.
S1 · E29
24m
▶
Night Before Launch✓
Oct 20, 2012
Two days are left before launch. First, the lunar lander Artemis goes into space on Mars V. Afterwards, Hibito and the rest of the crew will head into space on Mars I.
S1 · E30
24m
▶
Dog, Old Man, and Alexander✓
Oct 27, 2012
It's finally the day of the launch, but the weather doesn't look good. On top of that, Apo's run off, so Mutta has to go find him. While searching for Apo, Mutta comes across a suspicious old man.
S1 · E31
24m
▶
Rocket Road✓
Nov 3, 2012
Mutta, Apo, and the strange old man watch as Hibito launches off into space. Afterwards, Mutta reminisces about the road taken by Hibito to reach this point.
S1 · E32
24m
▶
A Private Place✓
Nov 10, 2012
Hibito has made it safely into space, and he's on his way to the moon. Meanwhile, Mutta runs into Azuma and his family, and he decides to approach them.
S1 · E33
24m
▶
Moon Rabbit✓
Nov 17, 2012
Hibito and the CES-51 crew finally land on the moon. However, Mutta is worried that Hibito will embarrass their country when he takes his first step.
S1 · E34
24m
▶
Pug and Hug on a Moonlit Night✓
Nov 24, 2012
Hibito and the CES-51 crew have landed on the moon. Meanwhile, Mutta has returned to Japan to await his final exam results. He's especially concerned about using up his luck before the results are announced.
S1 · E35
24m
▶
From the Little Corner of a Big Facility✓
Dec 1, 2012
JAXA has begun announcing the results of the final astronaut selection exam. Makabe Kenji receives the first phone call. As Kenji waits to learn his fate, he reflects on his motivation for wanting to be an astronaut.
S1 · E36
24m
▶
Dancing Astronaut✓
Dec 8, 2012
While Mutta waits to hear if he will become an astronaut, Kenji has received good news. The next candidate to get a call is Serika.
S1 · E37
24m
▶
Two Men in the Park✓
Dec 15, 2012
Two hours have passed since JAXA was supposed to notify the candidates, and Mutta hasn't received a call. When the phone finally rings, he's told to go to a nearby park. What will his fate be?
S1 · E38
24m
▶
Eleventh E-mail✓
Dec 22, 2012
After a long wait, Mutta learns that he passed the final exam. With no time to enjoy the moment, he is immediately whisked to the press conference, where the other new astronauts wait.
S1 · E39
24m
▶
Lunar Illusions✓
Jan 5, 2013
Mutta has begun his life as an astronaut. First, he must undergo a month of JAXA training and orientation. Meanwhile, Hibito and Damian head out in a lunar rover to track down a missing probe.
S1 · E40
24m
▶
Heaven and Hell✓
Jan 12, 2013
Damian and Hibito leave Moonbase in search of a missing unmanned probe. However, an accident occurs, stranding them inside a ravine.
S1 · E41
24m
▶
Eighty Minutes to Live✓
Jan 19, 2013
After a buggy accident, Hibito and Damian are stuck at the bottom of a ravine. Damian's spacesuit is damaged, and he's losing body heat quickly. The odds are against them, but Hibito decides that the unmanned drone Gibson is their key out.
S1 · E42
24m
▶
Hibito's Choice✓
Jan 26, 2013
Hibito manages to bring Damian back to the surface by using Gibson, but he's running out of time, as his oxygen supply dwindles. Will Freddy and Buddy find him in time?
S1 · E43
24m
▶
Brian✓
Feb 2, 2013
Hibito is able to save Damian, but he's running out of oxygen. Freddy and Buddy are trying to catch him, but they won't arrive before his oxygen depletes. Is this the end?
S1 · E44
24m
▶
Three Astronauts✓
Feb 9, 2013
Oxygen generation system Brian arrives just in time to save Hibito. Once he and Damian are rescued and back at Moonbase, he reflects on the astronauts who saved him.
S1 · E45
24m
▶
Five Blue Rangers✓
Feb 16, 2013
Mutta and the other astronaut candidates have finally finished their Japanese training. Before they head to Houston, they receive a gift from Director Nasuda.
S1 · E46
24m
▶
Number One Restless Guy✓
Feb 23, 2013
The JAXA astronaut candidates head to Houston, to begin training at NASA. However, Murakami-san appears to have a surprise in store for Mutta.
S1 · E47
24m
▶
The First Promise✓
Mar 2, 2013
Mutta and the other astronaut candidates have arrived in Houston to begin training at NASA. First up is a social event to meet the other astronaut candidates from around the world.
S1 · E48
24m
▶
Always Have a Pedometer in Your Heart✓
Mar 9, 2013
The first astronaut candidate task is undergoing a survival training course consisting of a six-day trek through the desert. Meanwhile, Mutta is still worried about Amanti's reaction after she read his fortune.
S1 · E49
24m
▶
Nitta the Leader✓
Mar 16, 2013
The astronaut candidates continue their survival training in the desert. Team E has fallen behind the others, but after Nitta takes the lead, they try to pick up the pace.
S1 · E50
24m
▶
Nitta and Mutta✓
Mar 23, 2013
As the survival training draws to a close, Nitta suddenly tells the team he needs to backtrack due to losing his cell phone, but Mutta stops him. However, Mutta appears to have an idea in mind.
S1 · E51
24m
▶
Living Stone✓
Mar 30, 2013
Mutta and Nitta backtrack through the desert, looking for Nitta's cell phone. But Nitta cannot find it in time to answer his little brother's call. Has he lost another chance to reach him?

Frequently asked

How many seasons does Space Brothers have?

Space Brothers has 2 seasons with 99 episodes in total.

Is Space Brothers still on the air?

Space Brothers has ended and is no longer in production.

What network airs Space Brothers?

Space Brothers airs on Nippon TV, YTV.

When did Space Brothers first air?

Space Brothers first aired on March 31, 2012.

Hiroaki Hirata
Hiroaki Hirata
Mutta Nanba (voice)
KENN
KENN
Hibito Nanba (voice)
Masayuki Katou
Masayuki Katou
Kenji Makabe (voice)
Miyuki Sawashiro
Miyuki Sawashiro
Serika Itou / Mutta Nanba as a Boy (voice)
Masako Ikeda
Masako Ikeda
Sharon Kaneko (voice)
Yuko Sanpei
Yuko Sanpei
Hibito Nanba as a Boy (voice)
Shô Ryûzanji
Shô Ryûzanji
Tadashi Hoshika (voice)
Ryou Naitou
Ryou Naitou
Yasushi Furuya (voice)

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