The BEST Episodes of Space Brothers

Every episode ever - ranked by fan votes!

Last Updated: Oct 21, 2019

Network: YTV (JP)

One night in 2006, when they were young, the two brothers Mutta (born 1993) and Hibito (born 1996) saw what appeared to be a UFO heading for the moon. They decided that night to both become astronauts and travel out into space. In 2025, Hibito has become an astronaut, and he's going to go to the moon. Mutta ended up following a more traditional career path with an auto development company. However, Mutta just ruined his career through a violent altercation with his boss. Now, not only has he lost his job, he appears to be blacklisted in the entire industry. Maybe this is a rare opportunity for Mutta to once again chase his childhood dream and become an astronaut like his little brother!

The Worst Possible Punishment

#1 - The Worst Possible Punishment

Season 1 - Episode 20

As the last day of the exam arrives, the teams are told to do what they want for the rest of the day before deciding on thier selections, so Team A decides to clean up the place. As Team A struggles to decide on a method of choosing two astronauts, Mutta recalls the advise Sharon gave him and suggests they decide via a game of rock, paper, scissors so that everyone has a fair chance. As Yasushi accepts to this, he shows off his recordings of everyone's scores, revealing he's been in a last place. Mutta reveals that he got the idea to use rock, paper, scissors from Yasushi, and he agrees to go along with it.

star 9.45
11 votes
Eleventh E-mail

#2 - Eleventh E-mail

Season 1 - Episode 38

Upon arriving at the conference building, Mutta meets with some of the unsuccessful applicants before heading to the main hall, where he is greeted by Serika, Kenji and Reiji, along with Team B's Ena Kitamura. As Hoshika gives Hibito the news of Mutta's success, Mutta manages to get through the conference without messing up. As the gang get together following the conference, Naoto joins them in celebration whilst Yasushi sends Mutta various texts congratulation him, explaining how he was always rooting for him.

star 9.31
13 votes
The Culprit is in the Room

#3 - The Culprit is in the Room

Season 1 - Episode 17

As Team A searches for the mysterious alarm, Mutta notices some strange behaviour in Yasushi. Haven't been reminded about the cameras by Naoto, Mutta believes JAXA is behind these incidents. He recalls what he learnt whilst visiting Houston, in which green cards are given to astronauts in training instructing them to create problems. Thus, Mutta correctly deduces that both Naoto and Yasushi had been given green cards ordering them to break the clock and set off the alarm. Later, Serika confesses about the food shortage to Mutta, who mistakenly believes it to be another green card order.

star 9.22
9 votes
The Day Before Goodbye

#4 - The Day Before Goodbye

Season 1 - Episode 19

As the exam approaches its final few days, Kenji gets to know his teammates better, which Hoshika musing that he didn't give Kenji a green card earlier in order to test his leadership skills. Meanwhile in Team A, as Mutta reveals they don't have any food left for tomorrow, he manages to gather some ingredients for making udon noodles. Remembering how he learnt it from Sharon along with Hibito, Mutta gets everyone to make udon together. Having not had anyone share his interest in space whilst he was in school, Mutta becomes pleasantly surprised when everyone else becomes surprised over how he knows Sharon, and they spend time talking about space together. The mood soon heavies when they are reminded they still need to choose two people to become astronauts.

star 9.18
11 votes
Brian

#5 - Brian

Season 1 - Episode 43

Hibito reminisces about Brian, who was something of a mentor to him. Checking the back of the figure, Hibito finds a picture of a young Brian with his brother, realising Brian left the figure there so both brothers would eventually stand on the moon together. The oxygen reserves in Hibito's suit soon runs out, putting Hibito through pain as he gasps for oxygen before almost losing consciousness. Just then, the oxygen producing drone named after Brian arrives on the scene, allowing Hibito to obtain some oxygen in the very nick of time.

star 9.14
14 votes
Those Who Wait for Hibito

#6 - Those Who Wait for Hibito

Season 2 - Episode 10

As Hibito, along with Damian and Linda, begin their journey back to Earth, Mutta's group give Pico their rover as a memento of their time together. The day soon comes for the space module Orion to enter the atmosphere and a collective sigh of relief is heard as the parachutes are successfully deployed and the three astronauts land safely. Arriving in Houston, Hibito greets Mutta, giving him a piece of rock from the moon as a souvenir.

star 9.14
7 votes
Sea Diver and Space Diver

#7 - Sea Diver and Space Diver

Season 2 - Episode 9

With a limited amount of time before they launch, the team search for materials they can use to keep the sponge tires dry. Visiting the hotel's utility room, Mutta borrows some silicone sealant from the janitor, which he uses to waterproof the tires. With all their elements in place, along with Mutta's addition of a toy astronaut to represent the purpose of the experiment, the rover manages to make it 200m from the target goal before its battery dies, ranking them fifth overall and second amongst the AsCans. After the contest, they are approach by the winning team, whose director turns out to be none other than Naoto, who is working hard to develop a Japanese manned rocket.

star 9.13
8 votes
A Long-Awaited Glimpse of the Sky

#8 - A Long-Awaited Glimpse of the Sky

Season 1 - Episode 21

After Team A decide their selections after one round, the third exam comes to its end and Team A is met with applause from the staff. Upon venturing out into the open sky again, the applicants discover they had been at JAXA the entire time. As Mutta and Keiji discuss how those who weren't selected may still have a chance, Yasushi, who lost out in the match, visits a much-admired professor, Hiroto Baba, who shows him his newly designed spacesuit. Whilst heading for a celebratory meal with the rest of Team A, Yasushi recalls how he got interested in space, but was troubled that he was too short to become an astronaut. This led him to admire Baba when he invented a smaller spacesuit which lowered the minimum height requirement to become an astronaut.

star 9.10
10 votes
A Private Place

#9 - A Private Place

Season 1 - Episode 32

As the candidates celebrate Hibito's launch, they are informed they will return to Japan and will hear of the results a week after Hibito lands on the moon, though Mutta opts to stay in Houston until Hibito lands on the moon. Later on, Hibito gives an interview aboard the Orion as it makes his journey to the moon, which is broadcast across Japan. As Mutta spends time with Jennifer, she shows him Azuma with his family. As Mutta goes to greet them, Azuma shakes his hand and invites him to join them, where he learns more about him from his wife. Later that night, Azuma recalls the pressures her faced from the press after orbiting the moon and how it was Brian Jay who reccomended Hibito be the first to walk on the moon.

star 9.10
10 votes
Trapped Rivals

#10 - Trapped Rivals

Season 1 - Episode 11

Arriving at an undisclosed location, the applicants are shown footage of the last moments of a group of astronauts before they died due to a chute failure upon reentry, in order to determine their willingness to continue with the exam. After everyone agrees to continue with the exam, the group is split up into three teams with each team spending two weeks together in a sealed environment before determining which two of them would make the best astronauts. Mutta is placed in a team with Serika, Reiji Nitta, Naoto Fukuda and Yasushi Furuya. The first assignment involves figuring out what the current time is, where Mutta comes up with a surprisingly precise answer.

star 9.09
11 votes
Running Bus

#11 - Running Bus

Season 1 - Episode 10

Before heading off to JAXA for the third exam, Mutta visits Sharon who tells him not to worry about not having a reason to go into space like Serika and Kenji has. As the exam begins, the applicants board a strange bus supposedly heading towards a top secret facility, with only Kenji noticing there are cameras onboard. An hour into the journey, they begin an exercise in which each applicant spends ten minutes talking to each other. Afterwards, they are asked to fill in a survey ranking everyone's potential to be an astronaut, followed by a meal and a rest before the bus arrives somewhere.

star 9.08
12 votes
Two Men in the Park

#12 - Two Men in the Park

Season 1 - Episode 37

As Mutta becomes anxious about whether he has enough luck to pass, Hoshika decides to share the load of revealing the results. The first person he calls is Mizoguchi, who is shocked to learn he has failed as he was always the top in everything he did. When asked why he failed, Hoshika explains it is his lack of depending on others that caused him to fail. Afterwards, Hoshika asks Mutta to meet him at the park, where he personally reveals that Mutta has passed his exam. Hoshika then takes Mutta straight to the press conference.

star 9.08
12 votes
Painful Interview

#13 - Painful Interview

Season 1 - Episode 26

As the day of the final exam arrives, Nanba is hindered by aching leg muscles due to all the squats he did the other day. After entering the interview room and meeting the examiners, including Azuma and Soichi Noguchi, Mutta sits down only for his chair to break due to a combination of a screw loosened by one of the examiners and Mutta's tenseness in hiding his cramps. After the interviews end, the candidates have a celebratory meal with the examiners. Unbeknownst to the candidates, the interview was a decoy intended to drop their guard as the examiners make observations outside of an exam environment. As Mutta is secretly probed for his observations on the other candidates, he comes face to face with Azuma.

star 9.00
10 votes
Piece of Cake

#14 - Piece of Cake

Season 2 - Episode 13

Mutta, Hibito and Serika accompany Sharon to a neurologist, where Serika fears she may be suffering from amyotrophic lateral sclerosis just like her father. As Sharon is admitted for more tests, Serika explains the details of ALS to Mutta, who is shocked to learn that it may one day kill her. As such, Mutta finds himself unable to concentrate on his written test and scores terribly. Following her examinations, in which she is properly diagnosed with ALS, Sharon is visited by Serika, who tells her about her father and motivates her to work hard on her research despite her illness. As Sharon heads back towards Japan, Mutta reaffirms his promise to help build her telescope. Later, Serika tells Mutta about a similar promise she made to get up to the ISS and develop a treatment for ALS.

star 9.00
10 votes
Wheelchair Pilot

#15 - Wheelchair Pilot

Season 2 - Episode 14

After Mutta takes a make-up exam, this time managing to concentrate properly, he once again meets Deneil Young. With the top scoring AsCans being assigned to the best flight instructors for their T-38 training, Mutta, as the only one who had to take a make-up, is assigned to Deneil.

star 9.00
10 votes
My Shining Star

#16 - My Shining Star

Season 1 - Episode 2

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.

star 9.00
20 votes
Next to Hibito

#17 - Next to Hibito

Season 1 - Episode 4

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.

star 9.00
10 votes
Et Cetera in My Head

#18 - Et Cetera in My Head

Season 1 - Episode 6

As Mutta arrives at the Johnson Space Center to observe Hibito's training, one of the JAXA judges brings up the reason Mutta was fired from his previous job. As Hibito appears on a television show that night, Mutta is surprised when Hibito starts praising him. Just then, Mutta receives a call from his former workmates informing them of what his former boss had told JAXA. As Mutta becomes convinced he has lost his chance of becoming an astronaut, one of the other JAXA judges, who had been observing Mutta and Hibito's constant visits to JAXA, meets up with Mutta's former workmates to get the whole story.

star 9.00
12 votes
Let's Talk About Space

#19 - Let's Talk About Space

Season 1 - Episode 15

As the JAXA staff decide to order Naoto new glasses as per Yasushi's request, Hoshika steps in to observe the exam. The next day, as Team B is put on edge when an alarm starts going off in the middle of the night, Team A discovers their clock has gone missing, later finding it smashed. The applicants are soon tasked with completing a blank puzzle within three hours. As the situation in Team A becomes tense as Yasushi accuses Serika of breaking the clock, Mutta tries to calm the situation by having everyone talk about space, getting them to consider JAXA broke the clock so they could learn to depend on their own sense of time whilst hiding the fact he saw Naoto break the clock.

star 9.00
10 votes
Ka-pe! Kenji!

#20 - Ka-pe! Kenji!

Season 1 - Episode 18

After a few more green card related incidents, Mutta is given his own green card, prompting him to make random noises throughout the day. Meanwhile, as Team B continues facing issues, Kenji is put under pressure when he is told to withdraw from the selections, feeling he has done nothing to improve teamwork. As Kenji seriously contemplates withdrawing, he recalls what his daughter said to him, realising she was telling him to do his best and regaining his confidence.

star 9.00
10 votes
The Worst Possible Interviewer

#21 - The Worst Possible Interviewer

Season 1 - Episode 24

As Hibito trains to use a space vechile for his moon mission, Mutta does some lawn mowing for Ozzy. Later, Mutta has dinner with Jennifer and Lowry, Hibito's backup, where he learns the examiner for the final exams will be Takio Azuma, who allegedly holds a grudge against Hibito for being selected to go on the moon instead of him, putting Mutta at a disadvantage.

star 9.00
8 votes
Miracle of Doha

#22 - Miracle of Doha

Season 1 - Episode 28

Hibito recalls how Mutta was bullied by those who didn't believe him about the UFO. Wanting to find proof of UFOs existing in order to stop the bullying without resorting to violence himself, he decided to make his own UFO, giving the footage he filmed to Mutta for his 13th birthday. Despite obviously telling it was a fake, Mutta appreciated the thought and treasured the DVD. When the bullies started turning on Hibito instead, Mutta fought against them with his headbutt.

star 9.00
9 votes
Night Before Launch

#23 - Night Before Launch

Season 1 - Episode 29

The Mars V rocket containing parts for the construction of a moonbase is successfully launched into space. On the night before Hibito's launch, Mutta is visited by his mother, who expresses her concerns about the launch. On the morning of the launch, NASA reports a 60% chance of the launch being postponed due to the weather, but Hibito remains optimistic that the launch will go ahead. As Mutta and Kenji visit the news center for updates on the weather, a kid with a punk hairstyle sets Apo loose.

star 9.00
10 votes
My Name Is Itou Serika

#24 - My Name Is Itou Serika

Season 1 - Episode 12

Mutta comes up with a method for his prediction, hiding the fact he had simply noticed what time it was when he left the bus. As Serika's hunger keeps her up, she recalls when she asked her father what the meaning behind her name was. The next morning, as the teams have to decide how to handle the food supply, they also discuss how to go about deciding which two candidates to pick to be astronauts. After everyone on Team A introduces themselves, Serika decides to let Mutta call her by her first name.

star 9.00
11 votes
Broken Glasses and the Sole of the Foot

#25 - Broken Glasses and the Sole of the Foot

Season 1 - Episode 14

As Naoto recalls how his work in developed a manned spacecraft alienated him from his family, his glasses get broken when they are accidentally stepped on by Yasushi. Despite his reduced visibility, Naoto becomes determined to not let it stop him. After Yasushi hears from Serika about how Naoto quit his job in order to get a chance for astronaut selection, he swallows his pride and asks mission control to order new glasses for him.

star 9.00
11 votes