How to say "feces" in Japanese

• 大便だいべんJLPT N1approx.Common
  nounThe neutral, matter-of-fact word for feces, including the clinical sense of 'stool'; a safe default when you need neither a childish nor a crude term.
• ふんCommon
  nounFeces with special reference to animals, matching 'dung'; the natural choice for talking about animal droppings, though not limited to them. Usually written in kana alone.
  俺おれは犬いぬのフンなんてかたづけたくない。↗

  I don't wanna clean up dog shit.
• うんこCommon
  noun, suru verb, intransitive verbChildish language for feces, equivalent to 'poop' or 'poo'; natural when speaking with or about children, but out of place in polite or formal contexts.
  生き物いきものなんだからウンコするに決きまってんだろ。↗

  It's a living being, so of course it shits.
• くそCommon
  nounColloquial word for feces, usually written in kana alone; crude and derogatory in tone, it also serves as an expletive, so it is seldom the neutral choice.
  お前まえの鼻はなをクソに擦すりつけてやった。↗

  I sure rubbed your nose in shit.

Use 大便 for neutral or clinical reference to feces, 「ふん」 especially for animals, 「うんこ」 as childish 'poop', and 「くそ」 only when a crude, colloquial tone is intended.

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

• 大便だいべんfeces
• ふんfeces (esp. animal)
• うんこpoop
• 糞便ふんべんfeces
• あっぽfeces
• 大のほうだいのほうfeces
• くそfeces
• 下しもlower half (of the body, esp. the privates)
• 大だいfeces