Heartbeat Fuzz (ハートビートファズ Hātobīto Fazu?)[1] is a move performed by Kyoka Jiro using the Earphone Jack Quirk.


Kyoka plugs her jacks into an amplifier, which uses the amplified sound of her heartbeat to release a destructive force strong enough to shatter rock.[2]

During the Hero License Exam, she wears two bracelets on her wrists that double as amplifiers to increase her destructive output.[1]


  1. 1.0 1.1 My Hero Academia Manga: Chapter 104 (p. 4).
  2. My Hero Academia Manga: Chapter 16 (p. 7-8).