Volume 4 covers chapters 26 – 34 in the manga.
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Synopsis:
Broke young man + chainsaw dog demon = Chainsaw Man!
Devil Extermination Special Division 4 is in serious trouble as a devil has sent a whole team of assassins to take Denji’s heart. In order to survive the onslaught, Denji, Power and Aki will have to get stronger. But is Denji smart enough to learn how to control his devil powers? Can you can teach an old chainsaw-dog-devil new tricks?
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Number of pages:  192
Release date:  April 2021
Age rating:  14+
Cover character:  Aki
Number of volumes: 11 (ongoing)