Humanity Has Declined (Light Novel)

Humanity Has Declined (Light Novel) is an manga series in the Humanity Has Declined franchise
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Humanity Has Declined is written by Romeo Tanaka and illustrated by Tōru Yamasaki (2007 to 2011). Sunaho Tobe replaces Yamasaki as the current illustrator. It originally ran under Shogakugan's imprint Gagaga Bunko.


  • Shogakugan

Publishing History

With the first volume published in May 24, 2007, it's an ongoing series with a total of 7 volumes.


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General Information Edit
English Name Humanity Has Declined (Light Novel)
Japanese Name: 人類は衰退しました
Romaji: Jinrui wa Suitaishimashita
Publisher Shogakukan
Start Year 2007
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Aliases Jinrui wa Suitaishimashita
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