Japanese study guide
Japanese Onomatopoeia: The Giongo and Gitaigo Words Textbooks Skip
Japanese onomatopoeia explained — giongo (sound words) and gitaigo (mimetic words) that native speakers use constantly and textbooks barely touch.
Japanese uses far more onomatopoeia than English does, and not just for sounds — a huge category describes textures, emotions, and manners with no literal sound at all. Native speakers use these constantly in casual speech; most textbooks barely mention them. Here's an introduction.
Two categories worth knowing, and a third you'll see mentioned
- 擬音語 (ぎおんご, giongo) — sound words: what something sounds like. Closer to English "bang" or "clatter."
- 擬態語 (ぎたいご, gitaigo) — mimetic words: what something feels like or looks like, with no literal sound involved. English has far fewer of these — "wishy-washy" is one of the rare equivalents.
Some references split out a third category, 擬声語 (ぎせいご, giseigo), for sounds made by living things specifically — animal cries and human voices — as distinct from giongo's inanimate/nature sounds. Others fold giseigo into giongo as a subtype, which is the two-way split this post uses for simplicity. Either way, the underlying words are the same; only the label changes.
Onomatopoeia words are usually written in katakana or hiragana, often reduplicated (the same syllable pattern repeated), and function as adverbs — describing how an action happens rather than naming a thing.
Giongo (and giseigo): sound words
| Word | Reading | Meaning |
|---|---|---|
| ワンワン | ワンワン | woof woof (dog bark) |
| ニャー | ニャー | meow |
| ガタガタ | ガタガタ | rattling, clattering |
| ザーザー | ザーザー | heavy rain sound |
| ゴロゴロ | ゴロゴロ | rumbling (thunder), also lazing around |
| パチパチ | パチパチ | clapping, crackling |
| コンコン | コンコン | knock knock, also a dry cough |
Gitaigo: how something feels or happens
| Word | Reading | Meaning |
|---|---|---|
| キラキラ | キラキラ | sparkling, glittering |
| ドキドキ | ドキドキ | heart pounding (nervous/excited) |
| ワクワク | ワクワク | excited, thrilled with anticipation |
| イライラ | イライラ | irritated, on edge |
| ニコニコ | ニコニコ | smiling warmly |
| ゆっくり | ゆっくり | slowly, at ease |
| ぐっすり | ぐっすり | soundly (sleeping) |
| ふわふわ | ふわふわ | soft and fluffy |
| べたべた | べたべた | sticky |
| つるつる | つるつる | smooth, slippery |
How they actually get used
Onomatopoeia usually pairs with a verb, often with する or a manner marker: 頭がガンガンする (my head is pounding), ゆっくり話してください (please speak slowly), ドキドキした (my heart was pounding/I was nervous). Learning the word alone without a sentence to anchor it is especially unhelpful here — キラキラ means little until you've seen 星がキラキラ光っている (the stars are twinkling) or a similar example.
Worth learning even though it's not on exam vocab lists
Onomatopoeia is underrepresented on JLPT vocabulary lists relative to how often it shows up in real speech, manga, and casual conversation — which makes it a good example of a gap that a frequency-only or exam-only study plan leaves open. If your listening comprehension of native content feels weaker than your reading, this category is a common reason why.
For structured, exam-aligned vocabulary to build alongside this, see essential JLPT N4 vocabulary or essential JLPT N3 vocabulary.
Frequently asked questions
What's the difference between giongo and gitaigo? Giongo (擬音語) are words for actual sounds — what something sounds like, such as ザーザー for heavy rain. Gitaigo (擬態語) describe a state, texture, or manner with no literal sound involved, such as キラキラ for sparkling. Some sources also split out giseigo (擬声語) for animal and human sounds specifically.
Is Japanese onomatopoeia only for children's books? No — that's a common misconception. Giongo and gitaigo appear constantly in adult conversation, news, and writing, not just manga or children's stories. Skipping them leaves a real gap in listening comprehension of native content.
Are onomatopoeia words on the JLPT? Some appear, but they're underrepresented relative to how often they show up in real speech, since JLPT vocabulary lists lean toward content words. They're worth learning as a supplement to exam-aligned lists, not a replacement for them.