How to say "flea" in Japanese

Choosing the right word
  • 蚤のみ
    nounThe word for the insect itself: the small wingless parasite that bites people and animals. Think of an itchy bite on an ankle, or a pet scratching because it has picked up fleas.
  • nounChildren's language for tiny creepy-crawlies: it covers bugs and lice as well as fleas, so it is rarely the word you want for the insect — picture a child pointing at something small and crawly.

Use 蚤 for the insect itself — the small parasite that bites people and animals; 「ちいちい」 is children's language covering bugs and lice as well as fleas, so it fits only childish talk about tiny creepy-crawlies.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

Japanese equivalents

Say it right, write it right

Core lookup works fully offline, with cloud pronunciation and one-tap save & review. Free, no sign-up.

Free downloadWindowsFree downloadmacOSDownload on the App StoreGet it on Google Play
MobileiOS / Android

Android

QR code for the Google Play pageGet it on Google Play

Scan it with your Android phone to install, or search for “Tomoshi” on Google Play.

iOS

QR code for the App Store pageDownload on the App Store

Scan it with your iPhone camera to install, or search for “Tomoshi” in the App Store.

Install the browser extensionLook words up on any web page · Chrome / Edge / Safari

Screenshot of a Tomoshi lookup resultScreenshot of Tomoshi lookup results on a phone

Windows macOS Chrome / Edge / Safari extension iOS / Android