How to say "fat" in Japanese

Choosing the right word
  • 太いふといJLPT N5approx.Common
    i-adjectiveThe adjective for physical thickness or girth: a fat person, thick arms, legs, or a thick rope. It describes what is wide or bulky, not fat as a substance.
    彼かれは太ふとい首くびをしている。↗
    He has a thick neck.
  • 脂肪しぼうJLPT N1approx.Common
    nounFat as a substance — the fat in food or stored in the body. Use it in talk about diet, health, and nutrition, not to describe a fat person.
    脂肪しぼう分ぶんは減へらしたほうがいいですね。↗
    You had better cut out the fat.
  • 脂あぶらJLPT N2approx.Common
    nounFat or grease as a substance, especially animal fat such as tallow or lard. It suggests rich, fatty grease rather than fat as a body or nutrient concept.
    I have greasy skin.
  • デブCommon
    no-adjective, na-adjectiveA colloquial noun for a fat person. It is blunt and usually insulting, so it is not the word to use when describing someone politely.
  • 脂身あぶらみCommon
    nounFat of meat: the fatty part of a cut, which some diners leave or enjoy. It applies only to meat, not to body fat or grease in general.
    肉にくから脂身あぶらみを取とりなさい。↗
    Trim the fat off the meat.

Choose 「太い」 for the adjective 'fat/thick' of bodies and objects, 脂肪 for fat as a substance in food or the body, 脂 for grease or animal fat, 「デブ」 for a fat person colloquially, and 脂身 for fat on meat.

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

Japanese equivalents
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JLPT vocabulary levels are community estimates, not official (no official lists have been published since the 2010 revision).

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