I was watching an anime, and they use repetitions of "ブツ" everytime a character is mumbling. Is this the rule for japanese or it's just something made up for a particular anime/manga?


2 Answers 2


For mumbling, there are 「ブツブツ」、「ボソボソ」、「ブツクサ」, etc. Those three are commonly used.

If you did not know, we have an onomatopoeia for "everything" including things that do not even make any actual sound.

  • That's interesting, can you give me an example of an onomatopoeia for something that doesnt make a sound?
    – Pablo
    Jun 10, 2018 at 14:05
  • 11
    シーン is an onomatopoeia for silence!
    – mamster
    Jun 10, 2018 at 14:07
  • 5
    or ジー which is is for staring. Jun 10, 2018 at 19:34
  • Chinese sometimes does the same, like 咿唔, which is ‘the sound of reading’. Jun 11, 2018 at 11:30

Besides ブツブツ, another onomatopoeia of mumbling in Japanese is ゴニョゴニョ (reference).

Example in the wild:


Another one:


Beware that it can also have other meanings, though, or can have a nuance of "blablabla".

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