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Humanity Has Declined 

Jinrui wa Suitai Shimashita (original title)
1:33 | Trailer
An unnamed girl acts as a mediator between humans and "fairies" after they have become the most prosperous species following the decline of the human population.







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Series cast summary:
Mai Nakahara Mai Nakahara ...  I / ... 12 episodes, 2012
Unshô Ishizuka ...  Grandpa 8 episodes, 2012
Satomi Akesaka Satomi Akesaka ...  Fairy / ... 7 episodes, 2012
Hisako Kanemoto Hisako Kanemoto ...  Fairy / ... 7 episodes, 2012
Nozomi Sasaki Nozomi Sasaki ...  Fairy / ... 5 episodes, 2012


After years of declining birth rates that has forced the human race to cede more and more territory to beings known as "Fairies," only a handful of humans remain among what's left over from human civilization while the rest of the world is dominated by these new highly intelligent creatures. However, despite humanity's diminishing importance, our young unnamed heroine (aka 'I' or 'Watashi') decides to take over her grandfather's position as a mediator between the races. She expected it to be an effortless job, but it turns out that it is nowhere near as straightforward as she had imagined, much to her dismay. Nevertheless, she will persist by maintaining good relations with the fairies while putting up with their strange, and sometimes irritating, habits.

Plot Summary | Add Synopsis


TV-14 | See all certifications »

Parents Guide:

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Official Sites:

Official site [Japan]





Release Date:

1 July 2012 (Japan) See more »

Also Known As:

Humanity Has Declined See more »

Company Credits

Show more on IMDbPro »

Technical Specs



Aspect Ratio:

16:9 HD
See full technical specs »

Did You Know?


During the beginning of Episode 10, when Watashi is reading from her predecessor's fairy contact journal, the on-screen display and font is extremely similar to the video game series "Resident Evil." Also, the content of the journal mimics the infamous "Keeper's Diary" from the original Resident Evil. See more »


Me (aka 'Sweets girl'): Yes! One small candy for man, one giant candy for new mankind.
See more »

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User Reviews

A good approach on society
22 September 2017 | by chalkwaniSee all my reviews

Humanity has Declined is one of the most interesting series released during its year and has every right to be praised.

The story puts the viewer on the daily life of a snarky unnamed female protagonist who must deal with diverse problems that the remaining humans on the place have to treat while also approaching little creatures called fairies, which the protagonist describes as the "new humanity". The show takes bites on many topics about our modern society like consumerism, public relations, evolution, etc, however it doesn't go in a "in your face" exposition, instead, such information is delivered in subtle scenes and dialogues where the viewer must connect the dots in order to understand the full picture. Something that can be off-putting is how the show was broadcasted. In a similar fashion as the Melancholy of Haruhi Suzumiya, Humanity has Declined aired in no chronological order. While this can confuse some people, the viewer might also end enjoying the show even more due to the stories presented and how those connect to previous episodes.

Humanity Has Declined is a really interesting show and can be re-watched due to its high entertainment value or just to have a better grasp of some bits of story.

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