A librarian is subject to a scientific experiment which goes wrong and transforms him into 'The Human Vapour'. He uses his new ability to rob banks to fund the career of his girlfriend, a beautiful dancer. The Human Vapour is ruthless in his quest for money and kills anyone who stands in his way, especially police. He soon becomes Tokyo's most wanted criminal. Can he be stopped before he kills again?
as Mr. Mizuno
as Fujichiyo Kasuga
as Detective Okamoto
as Reporter Kyoko
as Jiya
as Detective Inspector
as Police Scientist
as Editor Ikeda
as Dr. Sano
as Mean Detective
as Detective Fujita
as Police Chief
as Kyoko's Fellow Reporter
as Fujichiyo's Teacher
as Nomura the Robber
as Kajimoto
as Policeman Ozaki
as Bank Manager (uncredited)
as Burly Guard (uncredited)
as Journalist (uncredited)
as Official (uncredited)
as Cop (uncredited)
as Shooting Guard (uncredited)
as Cop (uncredited)
as Member of crime laboratory (uncredited)
as Audience member (uncredited)
as Bystander (uncredited)
as Transitional Vapor Man (uncredited)
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as Audience Member (uncredited)
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as Wife (uncredited)
as Narrator / Mizuno