Kemono Jihen

怪物事変

7.3(189,405)

MAL Score

Ranked #2875

Popularity #643

Action
Mystery
Supernatural
Detective
Mythology

Episodes: 12
Duration: 23 min per ep
Aired: Jan 10, 2021 to Mar 28, 2021
Status: Finished Airing

Synopsis

Kohachi Inugami, a detective with a specialty in the occult, travels to a secluded rural village after an inn hostess asks him to look into a troubling pattern: livestock turning up as rotting, mutilated corpses with no clear explanation. As he investigates, Inugami’s attention is drawn to an odd farmhand shunned by the other children and nicknamed “Dorotabou” for his smell—someone who’s long since stopped expecting kindness from anyone.

Curious, Inugami brings the boy along despite the villagers’ disdain. The case becomes a doorway into a hidden reality where mysterious, beastlike beings known as Kemono exist alongside humans, offering Dorotabou a first glimpse of purpose beyond the life he’s been forced to endure.

Otaku Consensus

Kemono Jihen earns its “hidden gem” reputation through brisk supernatural casework, punchy fights, and Masaya Fujimori’s clean handling of a 12-episode shounen mystery that never drifts far from its occult-detective hook. Viewers and reviewers consistently praise its intrigue and monster-world texture, while the most repeated criticism is that its strong opening premise gradually settles into more familiar shounen rhythms rather than becoming something stranger.

Why You Should Watch

Watch Kemono Jihen if you want a supernatural detective shounen with youkai lore, child-protagonist found-family dynamics, and flashes of body horror without the long-arc sprawl of bigger battle series. It scratches a similar itch to early Jujutsu Kaisen in its monster investigations, but its emotional center is quieter and more damaged, closer to a misfit-household story than a school-club setup. The 12-episode length works in its favor: Ajia-do keeps the cases moving, the fights arrive without drowning out the mystery angle, and the urban-fantasy world feels built for more without making the season feel like a commercial for the manga. If you like occult problem-solving with gore at the edges and a mostly male child cast carrying heavier material than expected, this is the lane.

Key Characters

K
Kohachi Inugami
Inugami stands out as the rare shounen mentor whose calm detective professionalism makes the supernatural world feel procedural rather than purely chaotic.
D
Dorotabou
Dorotabou is compelling because his monster-boy identity is played through emotional bluntness and social rejection rather than loud underdog theatrics.

What Makes It Stand Out

1
Ajia-do’s production packages the series as a compact Winter 2021 cour: 12 episodes airing from January 10 to March 28, 2021, with no second-cour padding or tournament-style detours.
2
The show’s identity is more specific than “supernatural action”: AniList tags it at 95% Monster Boy, 93% Youkai, 93% Primarily Child Cast, and 76% Detective, which captures its unusual mix of folklore, casework, and young leads.
3
Its darker edge is not just marketing language; AniList also tags it with Body Horror at 67% and Gore at 61%, reflecting the series’ willingness to put grotesque imagery inside a shounen framework.
4
The production credits separate character design, prop design, art direction, art design, color design, photography, and editing across different named staff, including Nozomi Tachibana, Ryou Hirata, Sachiko Nishiguchi, Seiji Oohara, Naomi Nakano, Teppei Satou, and Rie Matsubara.
5
Reception data shows a series with more reach than its “hidden gem” label suggests: it holds a 7.35 MAL score from 188,668 votes, MAL popularity rank #641, AniList score 72/100, and 2,370 AniList favourites.

Fun Facts & Trivia

Fun fact 1: Kemono Jihen is adapted from Shou Aimoto’s original manga, with Noboru Kimura handling series composition for the anime version.
Fun fact 2: Masaya Fujimori directed the anime at Ajia-do, a studio better known for character-focused TV animation than for glossy high-volume action franchises.
Fun fact 3: Online reception repeatedly frames the anime as a “hidden gem” of its season, especially among viewers looking for mystery and supernatural material rather than a pure battle-shounen showcase.
Fun fact 4: The Otaku Exhibition’s review praised the strength of the premise while noting the common reservation: by the end of the second episode, the series can feel more like standard shounen than its eerie opening initially promises.
Fun fact 5: AniList’s tag spread is unusually concentrated around identity and cast makeup: Monster Boy, Primarily Child Cast, Youkai, Kemonomimi, Femboy, and Primarily Male Cast all rank at 77% or higher.