Space Brothers UCHU KYOUDAI vol.1-43

Space Brothers (Japanese: 宇宙兄弟, Hepburn: Uchū Kyōdai) is a Japanese manga series written and illustrated by Chūya Koyama. It has been serialized in Kodansha's seinen 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.

In 2011, Space Brothers won the general category at both, the 56th Shogakukan Manga Award and the 35th Kodansha Manga Award. By March 2022, the manga had 28 million copies in circulation, making it one of the best-selling manga series.

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.