Kemono Jihen is a Japanese dark fantasy and occult suspense manga series written and illustrated by Sho Aimoto, serialized in Shueisha’s Jump Square since December 2016.
Kemono Jihen follows children who are part human and part supernatural creature as they investigate strange incidents involving hidden beings known as kemono.
The series blends mystery, folklore, action, and coming-of-age drama.
Its tone can shift quickly from playful found-family comedy to grim supernatural horror.
The manga began in the January 2017 issue of Jump Square, released on December 2, 2016.
As of December 2025, it has 24 collected volumes and more than 8 million copies in circulation worldwide.
A television anime adaptation by Ajia-do Animation Works aired from January to March 2021.
A stage adaptation titled Kemono Jihen: Tokyo Arc is scheduled for September 2026.
Kabane Kusaka is a 13-year-old boy living at a countryside inn run by his aunt.
Because of his strange body and emotionless manner, locals cruelly call him “Dorotabo” and treat him like an unwanted monster.
One day, animals in the area begin dying under mysterious circumstances.
Kohachi Inugami, a detective from Tokyo who specializes in supernatural cases, arrives to investigate.
Inugami soon discovers that Kabane is not fully human.
He is a half-kemono child born between a human woman and a ghoul-like being called a Curer, a creature with an undying body.
Rather than leave Kabane in his miserable life, Inugami brings him to Tokyo.
There, Kabane joins the Inugami Detective Agency, a small but lively workplace full of unusual residents.
Kabane begins working alongside Shiki Tademaru, a spider-human hybrid, and Akira, the Fifty-sixth Child of Iwakiyama Yukisato Shirona, a snow boy.
In the back room also lives Mihai Florescu, a brilliant but lazy vampire who prefers online games to fieldwork.
Kabane possesses a mysterious stone called the Life Calculus.
Inugami believes it may be the key to finding Kabane’s missing parents.
However, Yoko Inari, a powerful fox kemono embedded within the police, also wants the stone.
Her schemes gradually pull Kabane and his friends into a wider conflict over ancient stones, hidden villages, and the old war between humans and kemono.
Kemono
Kemono are supernatural beings who have lived alongside humans since ancient times.
They include creatures such as foxes, tanuki, vampires, oni, snow people, spiders, and ghouls.
Most kemono hide from ordinary society.
However, as their contact with humans increases, mixed children known as half-kemono have become more common.
Inugami Detective Agency
The Inugami Detective Agency appears to be a normal private investigation office.
In truth, it is a specialist agency that handles supernatural incidents caused by kemono.
It is also called the Kemono Consultation Office or simply the “Kemono-ya.”
For Kabane, it becomes less like a workplace and more like the first real home he has ever known.
The Kemono Jihen
The title refers to an ancient conflict that took place around a thousand years before the main story.
Humans and kemono once coexisted more openly, but the war forced the two worlds apart.
The Calculus Stones
The Calculus Stones are powerful crystallized objects created from the flesh of an undying Curer.
Each stone contains a different ability and is often guarded by leaders of kemono communities.
The Life Calculus quenches thirst and helps stabilize Kabane’s body.
The Demon Calculus can manipulate human hearts and minds.
The Null Calculus brings death, while the Illusion Calculus allows transformation and deception.
Other stones govern water, weather, purification, earth, prosperity, divinity, shadow, and light.
These stones are central to the power struggle between Inugami’s group and Yoko Inari.
Whoever gathers them gains influence not only over kemono society but potentially over Japan itself.
Kabane Kusaka
Kabane Kusaka is the protagonist of the series.
In the anime, he is voiced by Natsumi Fujiwara.
Kabane is a half-human, half-Curer boy with extraordinary strength and regeneration.
As long as his head remains intact, his body can recover from severe damage.
Because of his lonely upbringing, Kabane begins the story with little understanding of fear, anger, or affection.
His emotional growth is one of the series’ most important threads.
He is innocent, blunt, and easy to trick, but he is also terrifyingly strong in battle.
The Life Calculus suppresses his Curer instincts and helps maintain his regenerative power.
Kohachi Inugami
Kohachi Inugami is a tanuki kemono and the head of the detective agency.
He is voiced by Junichi Suwabe.
Inugami is relaxed, sly, and often unserious on the surface.
Underneath that lazy charm, he is a capable guardian figure who gives abandoned kemono children a place to belong.
He can transform himself and create objects through his tanuki abilities.
Despite his supernatural talent, he is famously bad with machines and digital technology.
Shiki Tademaru
Shiki Tademaru is a half-spider boy who works at the agency.
He is voiced by Natsuki Hanae, while his younger self is voiced by Motoko Kumai.
Shiki inherited spider abilities from his mother and can produce threads with different uses.
He uses them for combat, restraint, tracking, and protection.
He acts rough and irritable, especially toward Kabane at first.
Still, he is caring at heart and gradually becomes one of Kabane’s closest companions.
Akira, the Fifty-sixth Child of Iwakiyama Yukisato Shirona
Akira, the Fifty-sixth Child of Iwakiyama Yukisato Shirona is a snow boy from a secluded mountain village.
He is voiced by Ayumu Murase.
Akira can freeze moisture, create ice, and cause blizzards when his emotions run high.
Despite that dangerous power, he is gentle, cheerful, and easily frightened.
He loves cute things and often dresses in feminine clothing, but he strongly wants to be recognized as a boy.
He came to the agency while searching for his missing twin brother, Yui.
Mihai Florescu
Mihai Florescu is a vampire from Romania who lives in the agency’s back room.
He is voiced by Daisuke Ono.
Mihai is a genius hacker, engineer, and all-purpose intellectual with a very long life behind him.
He usually refuses to work in person because he would rather play online games in a tracksuit.
He is arrogant, mischievous, and fond of teasing others.
Even so, he sometimes shows unexpected kindness, especially when helping the younger agency members in his own strange way.
Kon
Kon is a young fox kemono who originally serves Yoko Inari.
She is voiced by Yumiri Hanamori.
Kon is loyal, earnest, and somewhat naive.
After failing a mission involving Kabane, she is cast aside by Inari and gradually becomes tied to Kabane’s group.
Her relationship with Kabane is awkward, funny, and emotionally important.
She begins as an enemy but slowly searches for her own will and identity.
Yoko Inari
Yoko Inari is a powerful fox kemono who holds authority within Japan’s police system.
She is voiced by Kana Hanazawa.
Elegant and playful on the outside, Inari is ruthless, manipulative, and deeply feared by many of her own subordinates.
She seeks the Calculus Stones in order to expand her control over Japan.
Her ability to influence hearts makes her especially dangerous.
Later in the story, she rises to the position of prime minister and announces a plan to transform humanity.
Nobimaru
Nobimaru is one of Yoko Inari’s fox subordinates and a member of the police special investigation unit.
He is voiced by Hiro Shimono.
Although he serves Inari, Nobimaru often acts in mysterious ways.
He gives advice to Kabane’s group, helps certain allies escape Inari’s control, and keeps his true motives hidden.
He usually appears as a younger boy because he believes looking cute is useful.
Behind that charming face is a cunning strategist who rarely shows all his cards.
Aya Tademaru
Aya Tademaru is Shiki’s younger half-sister.
She is voiced by Kaede Hondo.
Like Shiki, she inherited spider abilities, but her threads specialize in healing and bodily repair.
She is not a fighter, yet her power is rare and valuable.
Kumi, Child of the Mountain Spider
Kumi, Child of the Mountain Spider is Shiki and Aya’s mother.
She is voiced by Aya Hisakawa.
Kumi is a gentle spider kemono who loved her children deeply.
Her tragic past becomes central to Shiki’s character arc.
Akio Tademaru
Akio Tademaru is Shiki’s uncle and a folklorist.
He is voiced by Akira Ishida.
At first, he appears polite and scholarly.
His true nature, however, is cruel and obsessed with creating a legendary spider creature for his own fame.
Grandma Ohana
Grandma Ohana is an elderly doctor who treats kemono.
She is voiced by Ikuko Tani.
Originally a veterinarian, she began healing supernatural beings after caring for stray animals without discrimination.
She supports Inugami’s work and treats kemono as lives worthy of equal care.
Yui, the Fifty-fifth Child of Iwakiyama Yukisato Shirona
Yui, the Fifty-fifth Child of Iwakiyama Yukisato Shirona is Akira’s twin brother.
He is voiced by Kaito Ishikawa.
Unlike Akira, Yui has a more forceful and masculine personality.
His separation from Akira and the tragedy of their snow village become a major emotional storyline.
Fox Kemono
Fox kemono are among the most influential supernatural beings in Japan.
They are skilled in illusion, transformation, fire techniques, and manipulation.
Yoko Inari commands several powerful fox agents.
These include Nobimaru, Akagi, Kaede, Hinata, Robara, Sakura, Tsubaki, and Umetaro.
The Kyoto fox village is highly hierarchical.
Its culture is shaped by class divisions, old doctrine, and reverence for a legendary fox named Mikuzu.
Tanuki Kemono
Tanuki are another major force in Japanese kemono society.
They are known for transformation, trickery, and spiritual techniques.
Yashima Temple in Kagawa is the main home of the tanuki.
It is also Inugami’s birthplace and the former home of the Illusion Calculus.
Important tanuki include Iyo-hime Yashima, Zenkichi Omikuji, Tarota Yashima, Fuku-hime Yashima, and the third-generation Tasaburo Tanuki.
Oni
Oni are physically powerful kemono who traditionally eat human flesh.
Although once mighty, their numbers and influence have declined.
Some oni pursue coexistence through controlled human-meat production, while others cling to hunting and old violence.
This split creates conflict between groups such as Oga Ham and the Marukuma family.
Snow People
Snow women and snow men live in remote cold regions.
They can manipulate cold and ice, and unusually strong individuals are extremely dangerous.
Snow men are rare.
In Akira’s home village, boys are treated less like people and more like precious breeding resources, a grim custom that shapes his past.
Spider Kemono
Spider kemono, including arachne-like beings, possess thread-based abilities.
Their powers can range from combat binding to delicate healing.
Shiki and Aya show two very different expressions of spider inheritance.
Their family story is one of the darkest and most emotional arcs in the series.
Vampires
Vampires are foreign kemono who feed on human blood.
Mihai represents this group in the main cast.
They are long-lived and physically strong.
Mihai also demonstrates that centuries of boredom can turn a vampire into a gamer, hacker, tailor, cook, and professional nuisance all at once.
The manga is written and illustrated by Sho Aimoto.
It is serialized in Jump Square and published under the Jump Comics label.
The first volume was released in Japan on March 3, 2017.
The twenty-fourth volume was released on December 4, 2025.
The series remains ongoing.
Its genre mix includes shonen manga, occult fiction, fantasy, suspense, and supernatural action.
The anime adaptation aired from January 10 to March 28, 2021.
It consisted of 12 episodes.
The series was produced by Ajia-do Animation Works.
It aired on Tokyo MX and other channels, with streaming distribution on multiple services.
Director Masaya Fujimori stated that he was drawn to the contrast between the cute visual style and the dark story content.
Because some darker material was difficult to depict directly on television, the anime used framing, atmosphere, and visual suggestion to preserve the horror.
Anime Staff
The anime was directed by Masaya Fujimori.
Noboru Kimura handled series composition and wrote the scripts.
Nozomi Tachibana designed the characters and served as chief animation director.
Yuya Mori composed the music.
The animation was produced by Ajia-do Animation Works.
The production committee included Bandai Namco Arts, Shueisha, YTE, Ajia-do, and Frontier Works.
Theme Songs
The opening theme is Kemonomichi by Daisuke Ono.
The lyrics and music were by MOMIKEN.
The ending theme is Shirube by Sayaka Sasaki.
The lyrics were by Sasaki, while Tomoyuki Honda composed and arranged the song.
Episodes
The anime contains the following episodes:
Episode 1: Kabane
Kabane meets Inugami, and his ordinary misery begins to change.
Episode 2: Kemono-ya
Kabane arrives at the agency and meets his new companions.
Episode 3: Fox
The fox faction begins to move around Kabane and the Life Calculus.
Episode 4: Mission
Kabane and the others take on work as supernatural investigators.
Episode 5: Infiltration
The group enters a dangerous case involving hidden kemono.
Episode 6: Awakening
Kabane’s abilities and emotions develop under pressure.
Episode 7: Hometown
Shiki’s past becomes the focus.
Episode 8: Truth
The secrets behind Shiki’s family are revealed.
Episode 9: Family
The emotional consequences of Shiki’s arc come to the surface.
Episode 10: Twins
Akira’s missing brother becomes central to the story.
Episode 11: Memories
Akira and Yui’s past is explored.
Episode 12: Kemono Jihen
The season concludes with the growing conflict over kemono and the stones.
A stage adaptation titled Kemono Jihen: Tokyo Arc is scheduled to run at Theater H from September 17 to September 27, 2026.
The cast includes Tomoaki Tomimoto as Kabane Kusaka.
Sohei Izumi plays Kohachi Inugami.
Naoki Tanaka plays Shiki Tademaru.
Takuto Omi plays Akira, and Cecil Daigo plays Yoko Inari.
The play is based on Sho Aimoto’s manga.
It is written and directed by Kosei Jung, with Norihiro Mouri serving as general director.
Kemono Jihen stands out for its contrast between youthful characters and grim subject matter.
Its heroes may be children, but the cases they face often involve abuse, exploitation, murder, and social rejection.
The heart of the story is found family.
Kabane, Shiki, Akira, Kon, and the others are all shaped by loneliness, but the agency gives them room to grow.
The series also uses Japanese folklore in a flexible and energetic way.
Foxes manipulate politics, tanuki run hidden communities, oni operate businesses, and vampires complain about gaming schedules.
That mix of mystery, horror, humor, and emotional healing gives Kemono Jihen its distinctive flavor.
💬 Community Discussion
Talk about this anime with people who actually care.