Human Vapor

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Human Vapor
Human Vapor in The Human Vapor
Mizuno in The Human Vapor
Alternate names Human Vapour, Vapor Man, Gas Man, Gas Man Mizuno
Subtitle(s) Gas Kaijin (気体怪人,   Kitai Kaijin)[1]
Species Genetically-altered human
Height 1.7 meters[2]
Weight 60 kilograms[2]
Forms Humanoid, gaseous
Relations Fujichiyo Kasuga (love interest)
Allies Fujichiyo Kasuga
Played by Yoshio Tsuchiya
First appearance Latest appearance
The Human Vapor Gas Man
Sound effects
This page is for the kaijin. For the film or stage production, see The Human Vapor. For the television series, see Gas Man.
I am no longer a human being. Therefore I am no longer subject to human law.

— Mizuno (The Human Vapor)

The Human Vapor (ガス人間水野,   Gasu Ningen Mizuno, lit. "Gas Man Mizuno") is a gaseous kaijin who first appeared in the 1960 Toho tokusatsu film The Human Vapor. The character returned in a 2009 stage adaptation of the film and will do so again in an upcoming Netflix television adaptation.


The Human Vapor in his humanoid form simply resembles a Japanese man, enveloped in a blue glow.


The Human Vapor

Mizuno was a former test pilot for the JASDF, but retired after he was diagnosed with cancer, and was then confined to a sanatorium for an extended period of time as a result. After his discharge, he gained employment as a school librarian, until a man by the name of Dr. Sano offered Mizuno to become a "test subject" for a scientist's projects. However, the tests backfired and Mizuno became an indestructible vapor man. He then began a life of crime in an attempt to support his girlfriend, Fujichiyo Kasuga.



The Human Vapor is able to convert his entire body to a gaseous state by concentrating, typically placing his hand over his heart to focus on his heartbeat.[3]


When in his vapor form, Mizuno can wrap himself around people's heads, causing them to die of asphyxiation.


The Human Vapor is able to disappear into thin air.


The Human Vapor is invulnerable to any physical damage (including bullets).


Mizuno finally met his end when his lover Fujichiyo killed them both in an explosion, dying as he crawled out of the destroyed theater.


Main article: Human Vapor/Gallery.


  • The Ultraman Gaia monster Wolf Gas is a partial homage to the Human Vapor, combining that character's gaseous transforming abilities with a more obvious werewolf motif.[4]


This is a list of references for Human Vapor. These citations are used to identify the reliable sources on which this article is based. These references appear inside articles in the form of superscript numbers, which look like this: [1]

  1. Definitive Edition of Toho Monster Movies!! Godzilla Special Effects Complete Works. Natsumesha. 21 December 1994. p. 71. ISBN 978-4816317750.
  2. 2.0 2.1 Godzilla Giant Monsters Super Encyclopedia (4th ed.). Kodansha. 15 March 1994. p. 65. ISBN 978-4063042702.
  3. The Godzilla Chronicles. Takeshobo. p. 77. ISBN 4-88475-267-8.
  4. "ウルトラマンガイアの登場怪獣". Retrieved 17 February 2022.


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