The Manga
I Am a Hero began as a manga. Written and illustrated by Kengo Hanazawa, it ran for eight years, sold over 8.3 million copies, won a Shogakukan Award, and redefined the zombie genre in Japan — before it became one of the most acclaimed Japanese horror films of the decade.
Kengo Hanazawa
花沢健吾 — Kengo Hanazawa was born in 1974 in Sapporo, Hokkaido. He is a manga artist known for psychological depth, detailed urban environments, and an unusual willingness to sit with uncomfortable, unheroic protagonists.
His debut series I Am a Hero (アイアムアヒーロー) ran from April 2009 to February 2017 in Shogakukan's Weekly Big Comic Spirits — a seinen magazine aimed at young adult men. Over 22 volumes, Hanazawa built one of the most emotionally complex and visually arresting zombie stories in the history of the genre.
In 2013 the series won the 58th Shogakukan Manga Award in the general category — one of Japan's most prestigious manga prizes. Critical praise focused on Hanazawa's ability to use the zombie genre as a vehicle for social commentary and psychological character study, rather than simple horror entertainment.
Volume Guide
22 volumes across 8 years. The film adapts roughly volumes 1–10.
Hideo's mundane life collapses. Tekko turns. Tokyo falls. The ZQN are introduced.
Hideo flees the city. He meets Hiromi. Her half-ZQN state is established.
The outlet mall refuge. Nurse Yabu. Iura's community and its fractures.
The mall falls. The ZQN evolve. Survivors scatter.
Hideo and Hiromi move deeper into rural Japan. New survivor groups. The scale of collapse becomes clear.
The manga's conclusion — longer, more expansive than the film. Hanazawa takes the story in directions the adaptation did not follow.
From Page to Screen
What the Film Kept
- • Hideo's psychological fragility and ordinariness
- • The shotgun as both practical tool and character symbol
- • Hiromi's half-ZQN state and its implications
- • The mall survivor arc and its social collapse
- • Nurse Yabu's antibody research thread
- • The ZQN's compulsive, human-echo behaviour
What the Film Changed
- • The manga's full 22-volume scope compressed to 126 minutes
- • Post-mall arcs (volumes 11–22) not adapted
- • Some character fates altered for pacing
- • The film's tone is somewhat less bleak than the manga's later volumes
- • Certain supporting characters reduced or merged