Gyo Review: Dead Fish With Mechanical Legs Are Coming Out of the Ocean and Nobody Knows Why

Quick Take

• Junji Ito's most deliberately revolting work — Gyo commits fully to biological disgust as its primary horror register
• The walking dead fish are absurd, and Ito knows it; the work operates in the space between the absurdity of the premise and the genuine horror of what bodily corruption represents
• 2 volumes complete; one of Ito's most divisive works but also one of his most focused on a single, consistent horror mechanism

Who Is This Manga For?

• Readers who can engage with biological disgust as a horror mechanism rather than just atmosphere
• Anyone who has read other Junji Ito and wants to experience his most viscerally committed work
• Fans of body horror who want it sustained across a complete narrative
• Readers who understand that absurdist premises can generate genuine dread

Content Warnings & Age Rating

Age Rating: M (Mature) Content Warnings: Body horror involving death and decomposition is central and graphic; the biological imagery is deliberately revolting; some sexual content in the later stages of the horror's progression

The M rating is accurate. This is Ito's most physically disgusting work.

Yu's Rating

Category	Score
Story Depth	★★★☆☆
Art Style	★★★★★
Character Development	★★★☆☆
Accessibility for Non-Japanese Readers	★★★★★
Reread Value	★★★☆☆

Story Overview

Tadashi and Kaori are on vacation in Okinawa. Kaori notices a smell. A fish with mechanical legs walks into their room. This is the beginning. What follows is an escalation from a single impossible fish to a full-scale invasion of sea life with mechanical walking apparatus, spreading onto land with the stench of death preceding them.

The mechanism is eventually partly explained — a relic of wartime biological experimentation, a bacterium that animates dead flesh and powers the machines. The explanation is less important than what the invasion produces in the human characters who are exposed to it.

Characters

Tadashi and Kaori — Their relationship, already under pressure, deteriorates under the horror's specific demands. Kaori's phobia of unpleasant smells means she is maximally affected by the invasion's most consistent property. Their dynamic is the human frame through which the biological horror is experienced.

Art Style

Ito's art is at its most technically detailed in rendering the mechanical-biological hybrid creatures — the fish, the legs, the increasingly elaborate walking dead creatures. His linework conveys both the mechanical precision and the organic corruption simultaneously.

Cultural Context

Gyo engages with Japan's specific coastal and ocean-adjacent mythology — the sea as a source of horror, the creatures that emerge from water as threatening rather than nourishing. The wartime origin of the machines references real Japanese imperial biological experimentation programs, giving the horror historical grounding.

What I Love About It

The scene where the smell is first described — Ito's wordless demonstration of what the characters are experiencing through their physical reactions — is the series' most effective deployment of an unshowable horror quality. The smell is the dominant experience of Gyo, and Ito finds visual equivalents for it throughout.

What English-Speaking Fans Say

Western readers who have read multiple Junji Ito works describe Gyo as his most divisive — readers who can engage with biological disgust as a horror register consider it among his most effectively sustained work; readers who prefer his atmospheric or psychological horror often find it excessive. It is consistently described as the work that tests whether you can handle Ito at his most viscerally committed.

Memorable Scene ⚠️ Spoiler Warning

The escalation in volume 2 — when the biological mechanism spreads from sea creatures to humans, and what the death-walking apparatus does to human bodies — is Gyo's most disturbing sequence and the fullest development of its central horror logic.

Similar Manga

• Uzumaki — Ito's most acclaimed complete work
• Tomie — Ito's most sustained single-character horror
• The Drifting Classroom — Japanese horror with biological/survival elements
• Emerging — Biological horror with procedural realism

Reading Order / Where to Start

Volume 1 — the first fish, the escalation, and the beginning of the invasion.

Official English Translation Status

VIZ Media published both volumes in an omnibus deluxe edition. Complete and available.

Pros & Cons

Pros

• The most focused and sustained deployment of a single horror mechanism in Ito's catalog
• Ito's art renders the biological-mechanical hybrid with extraordinary detail
• The premise's absurdity is used productively rather than undermining the horror
• Two volumes is exactly the right length

Cons

• The M content is genuinely revolting — this is not ambient horror
• Character development is secondary to the horror mechanism
• Readers who can't engage with biological disgust as a horror register will find it tedious

Format Comparison

Format	Notes
Deluxe Edition (Omnibus)	VIZ Media; recommended
Digital	Available

Where to Buy

Get Gyo Deluxe Edition on Amazon →

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