The kanji for mosquito has its buzz in it (蚊)

The kanji for mosquito is 蚊, read ka. It has two parts: 虫, insect, on the left, and 文, which on its own means writing. In Japanese, 文 is read ぶん (bun), so close to a mosquito’s whine, buuun, that the kanji seems to have the buzz built in. That’s a great memory aid. The real reason 文 is there is its sound in Chinese.

What the kanji say

虫 (mushi) means insect or bug. It began as a drawing of a snake, and you’ll also find it in 蛇 (hebi), snake, and 虹 (niji), rainbow. On the left of a kanji it usually marks a small creature: 蚊, mosquito, 蝶 (chou), butterfly, and 蟻 (ari), ant.

文 (bun) means writing, a sentence or culture: 文化 (bunka), culture, 作文 (sakubun), an essay, and 文字 (moji), a letter or character.

Why 文 is really there

蚊 is a phono-semantic compound: 虫 gives the meaning, and 文 gives the sound. In Chinese, the words for “writing” and “mosquito” sounded the same, and they still do (both are wén in Mandarin), so 文 was the obvious sound hint. When Japan borrowed the Chinese readings, both kanji came out as ぶん (bun). In practice, though, Japanese almost always reads 蚊 with its native word, ka.

An early Chinese dictionary tells a longer story. The Shuowen Jiezi, from around 100 CE, writes mosquito as 蟁, “a flying insect that bites people”, with 民 as its sound part. It gives a variant built with 昏, dusk, “because it comes out at dusk”, and calls 蚊 the popular way of writing it. The popular form won.

So 文 wasn’t chosen to imitate a buzz: it was chosen to spell a sound the word already had. But the Japanese reading bun really does sound like one, and Japanese writes a hum or buzz as ブーン (buun). That’s why the memory aid works so well.

And where does the word ka come from? Nobody knows. It may be related to 噛む (kamu), to bite, or 痒い (kayui), itchy.

How to use it

• 蚊に刺された。

  Ka ni sasareta.

  I got bitten by a mosquito.

• 蚊がうるさくて眠れない。

  Ka ga urusakute nemurenai.

  The mosquitoes are so annoying I can't sleep.

• 蚊取り線香をつけようか。

  Katorisenkou o tsukeyou ka.

  Shall I light a mosquito coil?

• 虫除けを塗った？

  Mushiyoke o nutta?

  Did you put on bug repellent?

• Mosquitoes sting in Japanese. The standard phrase is 蚊に刺される (ka ni sasareru), “to be stung by a mosquito”. In casual speech you’ll also hear 蚊に食われる (ka ni kuwareru), “to be eaten”. The itchy bump is a 虫刺され (mushisasare), a bug bite.
• 蚊帳の外 (kaya no soto), “outside the mosquito net”, means being left out: everyone else knows what’s going on, and you don’t.
• 蚊の鳴くような声 (ka no naku you na koe), “a voice like a mosquito’s whine”, is a tiny, faint voice.
• 蚊取り線香 (katorisenkou), the green spiral coil people light on summer evenings, is a classic sight of a Japanese summer.

Words with the same kanji

Remember it

An insect (虫) that hums “buuun” (文): 蚊, the mosquito at your ear at two in the morning. The buzz is a memory aid, not the history, but it’s one you won’t forget.

The kanji in this lesson

Tap Draw it to watch the stroke order. Numbers show where each stroke starts.

Draw it

Draw it

Draw it

Sources

• Multi-function Chinese Character Database (CUHK): 蚊
• Wiktionary: 蚊

Written by the Chirami team with the help of AI, then checked against JMdict and KANJIDIC2. How we write lessons. Spotted a mistake? Email support@brightsmilesolutions.org.