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Mushroom (マッシュルーム, Masshurūmu) is an B-Class Rank 93 professional hero for the Hero Association and in charge of H-City, together with Horse-Bone.


Mushroom has black hair styled in bowl-cut. Mushroom sports a black mask, covering the eyes and a black shirt with shoulder padding shaped as mushrooms along with a white cape.


Hero Association SagaEdit

Rumored Monster ArcEdit

As the higher-ups of the Hero Association discuss the status on the cities, Mushroom was mentioned as a hero in charge of H-City. Their report on the city was "all quiet here".[1]

Appearances in Other MediaEdit


Volume 8 OmakeEdit

A monster that was being transported to prison mentioned it was defeated by Mushroom.[2]

Abilities and PowersEdit

Mushroom's abilities have yet to be revealed. Though considering he is co-in charge of H-City means the Hero Association trust in his strength to a decent degree.


  1. One-Punch Man Manga; Chapter 20, page 8
  2. One-Punch Man Manga; Omake


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