Humanity Has Declined

Humanity Has Declined is a franchise comprised of 1 anime series, 2 manga series
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Humanity Has Declined originally began as a light novel that had an anime adaptation in summer of 2012.


Humanity Has Declined (Jinrui wa Suitaishimashita) is originally created by Romeo Tanaka as a light novel series that has a manga and anime adaptation.



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Light Novel

Written by Romeo Tanaka, the first six volumes was illustrated by Tōru Yamasaki and then, he was replaced by Sunaho Tobe in 2011. The series first began publishing on May 24, 2007 by Shogakukan and is still on going and as of July 2012.


This Series has produced three manga adaptions all written by Romeo Tanaka.

MangaWritten and Directed
Jinrui wa Suitaishimashita: Nonbirishita Hōkoku the first manga adaption was written by Romeo Tanaka and illustrated by Takuya Mitomi. It consists of only one volume and was published by Shogakukan in the Monthly Ikki on January 2012 and ran until July 2012.
Jinrui wa Suitaishimashita: Yōsei, Shimasu ka? the second manga adaption also written by Romeo Tanaka and illustrated by Terae Kichijō. The series is published by Media Factory in the Monthly Comic Alive. It was first published in March 2012 and is still ongoing.
Jinrui wa Suitaishimashita: Nonbirishita Hōkoku 4-koma the third manga adaption sldo written by Romeo Tanaka and illusrated by Takuya Mitomi who illustrated the first manga adaption this adaption was also published by the same publishing company as the first adaption, Shogakukan and was published in the Monthly Ikki in August 2012 and is still ongoing.


Directed by Seiji Kishi, the anime has 12 episodes which ran from July 2, 2012 to September 17, 2012.

General Information Edit
Name: Humanity Has Declined
Name: 人類は衰退しました
Romaji: Jinrui wa Suitaishimashita
Aliases: Jinrui wa Suitaishimashita
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