Translation guide
The English word "insect" generally translates to 虫 (mushi) in Japanese, but 虫 can also refer to worms, bugs, and other small creatures. This guide covers how to talk about insects in Japanese, including common words, phrases, and cultural notes.
The most common, everyday word for insect, bug, or any small creepy-crawly.
The default word for insect, bug, worm, or any small creature. It is used broadly and can refer to anything from beetles to caterpillars. In compound words, it often becomes ちゅう (chuu) in on'yomi readings.
庭に虫がたくさんいます。
There are a lot of insects in the garden.
虫が苦手です。
I don't like bugs.
The scientific or formal term for insect. Used in biology, textbooks, or when specifically referring to the class Insecta. Not typically used in casual conversation.
昆虫採集が趣味です。
Insect collecting is my hobby.
Common insect names in Japanese.
Butterfly.
蝶が花にとまっている。
A butterfly is resting on the flower.
Mosquito.
蚊に刺された。
I got bitten by a mosquito.
Bee or wasp. Context usually clarifies which one.
蜂が飛んでいる。
A bee is flying.
Ant.
蟻の行列ができている。
There is a line of ants.
Cicada. Very common in Japanese summer.
蝉がうるさい。
The cicadas are noisy.
Common phrases using 虫 that are not literal insects.
Selfish, having a nerve. Literally "the bug is good." Used to criticize someone for being presumptuous or self-centered.
そんなこと言うなんて虫がいいよ。
You've got a nerve saying that.
Premonition, gut feeling. Literally "a bug's notice." Refers to an intuitive sense that something is going to happen.
虫の知らせで、悪いことが起こる気がした。
I had a premonition that something bad would happen.
To be unable to contain one's anger. Literally "the bug in one's stomach won't settle."
彼の態度に腹の虫が治まらない。
I can't stand his attitude.
Using 虫 to describe a person with negative traits.
Coward, weakling. Literally "weak bug." Commonly used to tease someone who is scared or timid.
弱虫！
You coward!
Crybaby. Literally "crying bug." Used for someone who cries easily.
Bookworm. Literally "book bug." A person who loves reading.
彼女は本の虫で、一日中読んでいる。
She's a bookworm and reads all day.
While 昆虫 (konchuu) is the precise scientific term for insect, it is not used in everyday conversation. Using 昆虫 in casual speech can sound overly formal or technical. Stick to 虫 (mushi) for most situations.
In Japan, the sounds of insects like cicadas and crickets are considered a part of the seasonal atmosphere, especially in summer and autumn. There are many poetic words and expressions related to insect sounds.
彼は泣き虫だ。
He's a crybaby.