is a Japanese manga series written and illustrated by Chà «ya Koyama. It has been serialized in Kodansha's manga magazine Morning since December 2007. A 99-episode anime television series adaptation by A-1 Pictures aired from April 2012 to March 2014. The manga was also adapted into a live-action film that premiered in May 2012. An anime film, Space Brothers #0, premiered in August 2014.
By November 2025, the manga had over 34 million copies in circulation. In 2011, Space Brothers won the general category at both the 56th Shogakukan Manga Award and the 35th Kodansha Manga Award.
In the summer of 2006, Mutta Nanba and his younger brother, Hibito, witness what they believe to be a UFO, which flies off towards the Moon. Hibito decides he will go onto the Moon whilst Mutta decides he will aim for Mars. Nineteen years later, in the year 2025, Hibito has become a fully fledged JAXA astronaut assigned to go on a mission towards the moon. Mutta, on the other hand, has not been so successful in achieving his dreams. As Mutta eventually recalls his past ambitions, he receives a letter stating he has been accepted to join a JAXA training program for new astronauts. The series follows Mutta as he seeks to become an astronaut and achieve his longtime dream just like his brother did.
Space Brothers, written and illustrated by Chà «ya Koyama, has been serialized in Kodansha's manga magazine Morning since December 6, 2007. In March 2026, it was announced that the manga would end in three chapters. Kodansha has collected its chapters into individual volumes. The first volume was released on March 21, 2008. As of July 23, 2025, 45 volumes have been released. The series is set to end with its 46th volume.
The manga is available in digital form in North America and Europe from ComiXology and Amazon in both volume and SimulPub chapter format. It was previously also available in English as part of a read-only subscription from Crunchyroll and Kodansha USA.
A 99-episode anime television series adaptation by A-1 Pictures aired on Yomiuri TV from April 1, 2012, to March 22, 2014. It was simulcast by Crunchyroll. The series is licensed by Sentai Filmworks in North America. The 31st episode, which aired on November 4, 2012, features the first piece of voice acting to be recorded in space, performed by astronaut Akihiko Hoshide aboard the International Space Station. A special episode titled was screened in planetariums during Summer 2012 and was released on DVD with the 20th manga volume on February 22, 2013. In January 2024, Chà «ya Koyama stated that the anime is planned to continue after the manga ends.
A live-action film adaptation of Space Brothers was produced by Toho and released in Japanese theatres on May 5, 2012, later being screened at the Japanese Film Festival in Australia later that year. The adaptation was written by Chuya Koyama and directed by Yoshitaka Mori, with Shun Oguri and Masaki Okada playing the roles of Mutta and Hibito respectively. Real life astronaut Buzz Aldrin plays a cameo in the film as himself. The theme song for the film is British alternative rock band Coldplay's "Every Teardrop Is a Waterfall" from their album Mylo Xyloto. The film won the "Best of Puchon" and "NH Nonghyup Citizen's Choice" awards at the 16th Puchon International Fantastic Film Festival.
A prequel anime film titled Space Brothers #0 (Uchà « Kyà Âdai #0 in Japanese) was released in Japanese theaters on August 9, 2014. Manga creator Chà «ya Koyama wrote the script for the film.
Space Brothers has been nominated twice for the Manga Taishà Â, in 2009 and 2010. In 2011, it won the award for best general manga at the 56th Shogakukan Manga Awards and at the Kodansha Manga Award (shared with Chica Umino's March Comes In Like a Lion). In 2014, it won the Reader Prize of the 18th Tezuka Osamu Cultural Prize.
By November 2025, the manga had over 34 million copies in circulation. In 2024, alongside Case Closed, Space Brothers won the grand prize of Rakuten Kobo's second E-book Award in the "Long Seller Comic" category.