Kemono Jihen (怪物事変, meaning “Monster Incidents”) is a Japanese supernatural manga written and illustrated by Sho Aimoto. It has been serialized in Shueisha’s Jump Square magazine since December 2016 and has grown steadily in popularity, surpassing 8 million copies in circulation by early 2026.
In 2021, the series received an anime adaptation produced by Ajiado, airing from January to March 2021. The anime introduced a wider audience to its unique blend of dark folklore, emotional trauma, and urban fantasy detective work.
At first glance, Kemono Jihen may look like another action-heavy supernatural series. However, beneath its battles and creature lore lies something much heavier: a story about abandonment, identity, exploitation, and the fragile possibility of coexistence between humans and monsters.
Kemono Jihen – Official Trailer
What Is Kemono Jihen About?
Kemono Jihen begins in a rural Japanese village where livestock are found brutally mutilated during each full moon. The case draws the attention of Kohachi Inugami, a mysterious occult detective known as a “Kemonoist,” someone who mediates conflicts between humans and supernatural beings called Kemono.
In the village, Inugami meets Kabane Kusaka, a perpetually dirty and ostracized boy nicknamed “Dorotabo.” Kabane is treated as an outcast and forced into hard labor, but Inugami quickly recognizes that the boy is not fully human. Kabane is a hanyo, a half-human, half-ghoul hybrid with immense regenerative abilities and unnatural strength.
Rather than killing Kabane as originally intended, Inugami brings him to Tokyo and introduces him to the Inugami Strangeness Consultancy Office. There, Kabane joins two other young Kemono hybrids, Shiki and Akira, and begins solving cases involving hidden supernatural incidents across the city.
As the story progresses, what starts as monster-of-the-week investigations slowly reveals a larger conflict involving mystical artifacts known as Calculi, powerful Kemono factions, and dangerous individuals who seek to control both human society and the Kemono world.
The World of Kemono – Humans and Monsters Coexisting
In Kemono Jihen, Kemono are supernatural beings drawn from Japanese folklore, including tanuki, kitsune, yukionna, vampires, and other mythological creatures. Unlike many fantasy stories, Kemono are not hidden in distant worlds. They live among humans, often disguised, and tensions between the two groups are constant.
Inugami’s philosophy centers on coexistence. He believes humans and Kemono can share the same world peacefully. However, not everyone agrees. Certain factions, especially the manipulative kitsune leader Yoko Inari, view humanity as something to control rather than coexist with.
The series uses these tensions as a metaphor for prejudice, exploitation, and political manipulation. It does not present coexistence as simple or idealistic. Instead, it portrays it as fragile and constantly threatened by greed and ambition.
Main Characters
Kabane Kusaka
Kabane is the emotional center of Kemono Jihen. As a half-ghoul hybrid, he is immortal as long as his head remains intact and can regenerate severe injuries. He possesses immense strength but begins the story emotionally stunted due to years of abuse and isolation.
What makes Kabane compelling is not just his power, but his innocence. He struggles to understand emotions, family bonds, and affection because he was denied those experiences. His search for his parents and the truth behind his origins becomes one of the series’ central motivations.
Kabane also carries a powerful stone known as the Life Calculus, which suppresses his ghoul hunger. As the story develops, he begins collecting other Calculi, setting up a larger narrative about ultimate power and identity.
Kohachi Inugami
Kohachi Inugami is a tanuki Kemono who runs the detective agency. Calm, perceptive, and often playful, Inugami hides immense power beneath his relaxed personality. He can cast illusions, harden his body to steel, and summon weapons.
More importantly, he serves as a moral anchor in the story. His belief in coexistence shapes how the agency operates. Unlike many mentors in shōnen series, Inugami is not blindly optimistic. He understands the darkness within both humans and Kemono but chooses to work toward balance anyway.
Shiki Tademaru
Shiki is a half-human, half-Arachne hybrid capable of producing spider threads from his body. He is brash, sarcastic, and outwardly rude, but deeply protective of those he cares about. His backstory explores trauma, family separation, and exploitation by someone he should have been able to trust.
Shiki’s arc adds emotional weight to the series, especially when confronting painful truths about his mother and uncle. His character growth highlights one of Kemono Jihen’s recurring themes: confronting buried trauma is necessary for moving forward.
Akira
Akira is a yukionoko, descended from a snow spirit. Despite being physically male, he is extremely feminine and loves cute fashion and social media. His ice-based powers make him formidable in battle, but emotionally he is sensitive and easily frightened.
Akira’s storyline focuses on his search for his twin brother and his struggle with self-worth. Beneath his gentle demeanor lies immense potential, and his development reinforces the idea that strength does not always look aggressive or masculine.
Yoko Inari and the Kitsune Faction
Yoko Inari is one of the primary antagonists. A powerful kitsune who operates as a police superintendent in human society, she seeks control rather than coexistence. Her goal involves collecting the Calculi and consolidating power.
Inari is manipulative, intelligent, and ruthless. Through her faction, the series explores political ambition, betrayal, and the darker side of Kemono society.
Anime Adaptation (2021)
The anime adaptation of Kemono Jihen aired from January 10 to March 28, 2021, spanning 12 episodes. It was directed by Masaya Fujimori, with series composition by Noboru Kimura.
The adaptation covers early arcs of the manga, focusing on Kabane’s introduction, Shiki’s family storyline, Akira’s development, and the growing tension with Inari. The anime balances action and emotional storytelling well, though it only scratches the surface of the manga’s longer narrative.
The opening theme, “Kemono Michi” by Daisuke Ono, sets an intense and dramatic tone, while the ending theme provides a softer emotional counterbalance.
Following licensing changes, the anime became available on platforms including Crunchyroll, expanding its international reach.
Is Kemono Jihen Worth Watching?
Yes, especially if you enjoy darker supernatural stories with emotional depth. Kemono Jihen is not purely action-driven. While it contains strong fight sequences and interesting powers, its strength lies in character trauma, identity exploration, and moral ambiguity.
Kabane’s journey alone is worth watching. His gradual understanding of human emotion, friendship, and belonging gives the series heart. The world-building, rooted in Japanese folklore, adds uniqueness compared to more generic urban fantasy titles.
However, viewers should be prepared for heavier themes involving abuse, manipulation, and psychological distress. The tone can shift from light banter to deeply unsettling moments.
Why Should You Watch Kemono Jihen?
You should watch Kemono Jihen if you enjoy supernatural detective stories that slowly evolve into larger mythological conflicts. The blend of folklore, modern Tokyo settings, and morally complex antagonists creates a layered experience.
The show also stands out because it does not romanticize its darker elements. Trauma has consequences. Power has a cost. Characters must confront painful truths rather than escape them.
Additionally, the manga continues far beyond the anime, meaning there is much more story to explore for those who want to continue reading. With over 24 volumes released as of December 2025 and English publication by Seven Seas Entertainment, the series remains active and evolving.
Reception and Popularity
Kemono Jihen ranked 13th in the print category of the Next Manga Awards in 2018 and surpassed 4.2 million copies in circulation by March 2021. By January 2026, circulation exceeded 8 million copies, reflecting steady growth rather than sudden hype.
Its appeal lies in its combination of shōnen action structure with darker, more introspective themes.
FAQ
What is Kemono Jihen about?
Kemono Jihen is a supernatural series about half-human monsters solving mysterious incidents in Tokyo while uncovering a larger conflict involving powerful artifacts and competing Kemono factions.
How many episodes does the anime have?
The anime adaptation has 12 episodes and aired from January to March 2021.
Is Kemono Jihen finished?
The anime covers early arcs, but the manga is ongoing and has released 24 volumes as of December 2025.
Is Kemono Jihen dark?
Yes, it contains dark themes including abuse, trauma, manipulation, and moral conflict, although it balances those elements with humor and character bonding.
Where can you watch Kemono Jihen?
The anime is available on streaming platforms such as Crunchyroll, depending on region.
Final Thoughts
Kemono Jihen succeeds because it understands that monsters are not the only dangerous beings in the world. Sometimes the real horror lies in exploitation, ambition, and the refusal to accept others as equals.
Through Kabane’s journey from isolated outcast to valued partner, the series explores what it means to belong. It combines folklore, action, and emotional storytelling in a way that feels fresh without abandoning classic shōnen foundations.
For viewers looking for a supernatural anime that is both entertaining and thematically meaningful, Kemono Jihen is absolutely worth experiencing.
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