Uchuu Kyoudai
Space Brothers
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Uchuu Kyoudai
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Alternative Titles

Synonyms: Uchu Kyodai
Japanese: 宇宙兄弟
English: Space Brothers
French: Space Brothers
More titles

Information

Type: Manga
Volumes: 46
Chapters: 432
Status: Finished
Published: Dec 6, 2007 to Jun 11, 2026
Genres: Award Winning Award Winning, Drama Drama, Sci-Fi Sci-Fi
Themes: Adult Cast Adult Cast, Space Space, Workplace Workplace
Demographic: Seinen Seinen
Serialization: Morning
Authors: Koyama, Chuuya (Story & Art)

Statistics

Score: 8.771 (scored by 93519,351 users)
1 indicates a weighted score.
Ranked: #532
2 based on the top manga page. Please note that 'R18+' titles are excluded.
Popularity: #479
Members: 43,372
Favorites: 1,568

Available At

Kodansha
Kodansha USA
Official Site

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Uchuu Kyoudai
8.77
Ranked #53Popularity #479Members 43,372
MangaMorningKoyama, Chuuya (Story & Art)
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Volumes: /46
Chapters: /432
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Synopsis

"A big brother must always stay ahead of his younger brother. That is my responsibility as the older sibling"—these are the words that have always motivated Mutta Nanba to try his best when it came to his younger brother, Hibito. So naturally, in the summer of 2006 when the Nanba brothers witness something strange in the night sky, Hibito declared that he would become an astronaut and travel to the Moon, while Mutta countered with the affirmation that he would go to Mars. That was the promise they made to each other.

Now in 2025, while Hibito is working with NASA and preparing to become the first Japanese to land on the moon, Mutta has been fired from his job in an automotive development company. Having difficulty finding another job, Mutta is given a lifetime opportunity when he receives a letter from JAXA—the Japan Aerospace Exploration Agency—telling him that he has been accepted to participate in the next astronaut selection. As if fate has given him a chance to fulfill the promise he made all those years ago, Mutta undertakes the difficult challenge of going to space.

[Written by MAL Rewrite]

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Background

Uchuu Kyoudai was nominated for the second and third Manga Taisho Awards in 2009 and 2010. In 2011, the series won the 56th Shogakukan Manga Award, along with Yamikin Ushijima-kun. In the same year, it also won the 35th Kodansha Manga Award in the General category, along with 3-gatsu no Lion. The series also won the Reader Award of the 18th Tezuka Osamu Cultural Prize in 2014.

The series has been simulpub digitally in English as Space Brothers through K Manga. Kodansha USA has been releasing the series digitally since November 3, 2015.
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Uchuu Kyoudai
Adaptation (TV)
Uchuu Kyoudai
Uchuu Kyoudai: Itten no Hikari
Adaptation (Movie)
Uchuu Kyoudai: Itten no Hikari

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More characters
Characters

Nanba, Mutta
Nanba, Mutta
Main
Nanba, Hibito
Nanba, Hibito
Main
Apo
Apo
Supporting
Itou, Serika
Itou, Serika
Supporting
Makabe, Kenji
Makabe, Kenji
Supporting
Young, Deneil
Young, Deneil
Supporting
Bold, Vincent
Bold, Vincent
Supporting
Kaneko, Sharon
Kaneko, Sharon
Supporting
Jay, Brian
Jay, Brian
Supporting
Norton, Pico
Norton, Pico
Supporting

Reviews

Write review
9 Recommended
1 Mixed Feelings
0 Not Recommended
All reviews (10)
Sep 2, 2026
carnilino
Recommended
Only few stories managed to pull me in like this one. Going through challenges, victories and traumas with all the wonderful characters combined with the honesty and realism the story is told with was one of a kind experience. Last chapters had me bawling just from the fact that the story was going to end.

Must read if you like space or mature stories with realistic characters. Each has their motivations, quirks and strenghts which are not portrayed in your typical over-the-top anime style. Mind that this is not a sci-fi story, but very well researched and science based space exploration.

Ultimately, this story inspired me to ...
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Jan 8, 2015
Kesser
Recommended
Preliminary (242/432 eps)
This is one of the few mangas that I can describe as perfect. It's realistic with little touch of very hard SF. There are no idiotic ideas about astronaut recruitment. There is hard work, brutality of life, death, and yet it's still light and funny.

This manga is must read for everyone for everyone who likes topics of space and space exploration.
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Sep 4, 2026
fp264
Mixed Feelings
I read this manga as part of the Manga Reading Challenge, which had an item requiring a manga set in space. 46 volumes — it's long, but I finished it.
The drawings are good and the characters are easy to recognize.
Story-wise, there are some interesting twists that keep you on the edge of your seat.
But overall, I found myself bored at times, particularly when things became too technical. I didn't enjoy the incessant flashbacks, and the cliché of the two brothers doing incredible things together took away some of the realism.
The "everyone is kind to each other" aspect between the various nationalities can feel ...
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Poll: Uchuu Kyoudai Chapter 432 Discussion
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