Knights of Sidonia

The story is set in the year 3394, a thousand years after mankind flees from Earth after it was destroyed by a race of shapeshifting aliens – the Gauna (奇居子（ガウナ）), aboard hundreds of colossal spacecraft created from the remains of the planet. One such ship is the Sidonia, which has developed its own human culture closely based on that of Japan where human cloning, asexual reproduction, and human genetic engineering, such as granting humans photosynthesis, are commonplace. It is also revealed that the top echelons of this society have secretly been granted immortality. With a population of over 500,000 people, Sidonia is possibly the last human settlement remaining as the fates of the other ships are unknown.

Little is known about the true nature of the Gauna or their motivation for attacking humanity. At any given time, a Gauna consists of a nearly impenetrable core protected by a dense layer of malleable flesh known as "placenta" (胞衣, ena). Once the ena is shed away and the core is destroyed, the Gauna's body disintegrates.[2]

Sidonia is defended by large mechanized weapons called Gardes (衛人, Morito) whose weaponry and mobility is powered by "Higgs particles" (ヘイグス粒子, Heigusu Ryūshi),[3] armed with a high-output cannon for long range assaults and a special spear known as "Kabizashi" for close combat. The tip of the kabizashi is made of a rare and little-understood material which has the unique property of being able to destroy a Gauna's core. Later the Guardians are also equipped with firearms whose ammunition have the same material of the Kabizashi after a means to artificially mass-produce it is discovered. Most people in the surviving human population are screened and drafted as Guardian pilots at a young age, if they are shown to be capable of piloting them.

The story follows the adventures of Garde pilot Nagate Tanikaze, who lived in the underground layer of Sidonia since birth and was raised by his grandfather. Never having met anyone else, he trains himself in an old Guardian pilot simulator every day, eventually mastering it. After his grandfather's death, he emerges to the surface and is selected as a Guardian pilot, just as Sidonia is once again threatened by the Gauna.

The manga is written and illustrated by Tsutomu Nihei. It debuted in Kodansha magazine Monthly Afternoon's June issue in 2009. Since then, 13 tankōbon have been released. The manga has been licensed in North America by Vertical,[4] who released all fifteen volumes in English between February 5, 2013, and April 26, 2016.[5][6] The manga ended on September 25, 2015.[7]

An anime television series adaptation, produced by Polygon Pictures, premiered on April 10, 2014 and ended its first season on June 26, 2014, on MBS and later on TBS, CBC and BS-TBS.[8][9] The series was directed by Kobun Shizuno, assisted by Hiroyuki Seshita, with scripts by Sadayuki Murai and character designs by Yuki Moriyama.[10] The series has also been localized and streamed by Netflix in all of its territories since July 4, 2014, becoming the service's first original anime,[11] as well as the first anime series on Netflix available in Dolby Vision/HDR (High Dynamic Range).[12] The first season has been licensed for home video release by Sentai Filmworks.[13] The opening song is "Sidonia" by Angela and the ending song is "Show" (掌) by Eri Kitamura. A second season aired from April 10, 2015 to June 26, 2015, with Kishi Kōshinkyoku (騎士行進曲, Knight March) by Angela as the opening song and "Requiem" by CustomiZ as the ending song.[14] The second season was released on Netflix on July 3, 2015,[15] and has been licensed by Sentai Filmworks for home video distribution.[16] In 2017, a third season for the series was confirmed to be in development by director Hiroyuki Seshita.[17] However, in July 2020, the third season was revealed to be a new film that adapts the ending of the manga series.[18]

A new anime film, titled Knights of Sidonia: Ai Tsumugu Hoshi was announced on July 3, 2020. Hiroyuki Seshita will serve as chief director, while Tadahiro Yoshihira serves as director for the new film, with Polygon Pictures returning for production. Sadayuki Murai and Tetsuya Yamada are returning to write scripts, while Shūji Katayama is composing the music. The rest of the staff and cast are returning to reprise their roles.[19] The film is set to premiere in May 14, 2021.[20]