The Sound of Something Not Quite Right
ザワザワ (zawazawa) is the sound of restless murmuring — a crowd whispering anxiously, leaves rustling in the wind, or the vague, unsettled feeling that something is off. As a giseigo (擬声語), it imitates actual sounds: the overlapping whispers of a nervous audience, the rustling of trees before a storm.
More Than Just a Sound
What makes ザワザワ especially interesting is that it also works as a gijougo (擬情語) — an emotion word. 「胸がザワザワする」 (mune ga zawazawa suru, “my chest feels ザワザワ”) describes an internal sense of unease or foreboding, even when there’s no actual sound involved. It’s that gut feeling that something is about to go wrong — a creeping anxiety you can’t quite put into words. This dual nature makes ザワザワ one of the more versatile onomatopoeia in Japanese.
Fun Fact
Thanks to the manga and anime Kaiji, the stylized text “ざわ…ざわ…” has become one of Japan’s most popular internet memes. Whenever something shocking or tense happens online — a surprising announcement, an unbelievable plot twist — people post “ざわ…ざわ…” to express collective stunned murmuring. The meme has spread well beyond anime fans and is now part of mainstream Japanese internet culture.
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In Anime
Kaiji (カイジ)
The audience scenes in Kaiji are defined by ザワザワ — spectators murmuring in disbelief as the stakes escalate. The word appears as a sound effect so often that it's become synonymous with the series, and "ざわ…ざわ…" is now a widely recognized internet meme in Japan.
Attack on Titan (進撃の巨人)
Before a Titan breach or a major revelation, crowds of civilians or soldiers ザワザワ — the murmuring unease spreading through the group mirrors the audience's own growing dread. The show uses this collective restlessness as a signal that something terrible is about to happen.