How to say "stomach" in Japanese

• お腹おなかJLPT N5approx.Common
  nounThe everyday, polite word for the belly or the stomach as felt — hunger, fullness, pain. This is usually the word you want in ordinary conversation about how your stomach feels.
  いいえ、結構けっこうです。お腹なかが一杯いっぱいですから。↗

  No, thank you. I've had enough.
• 腹はらJLPT N3approx.Common
  nounAlso the abdomen or belly, but blunter and less soft than お腹; it carries shades of the belly as the seat of feeling or resolve. Fine in plain talk, but for a sore stomach お腹 is the more natural everyday choice.
  カンガルーの雌めすは子供こどもを腹はらの袋ふくろに入いれて動うごく。↗

  A female kangaroo carries its young in the pouch.
• 胃いJLPT N3approx.Common
  nounThe stomach as the digestive organ proper — organ-related medical talk, indigestion, stomach aches. When English 'stomach' means the actual organ rather than the belly, this is the word you want.
  食物しょくもつは胃いの中なかで消化しょうかされる。↗

  Food is digested in the stomach.
• 胃袋いぶくろCommon
  nounLiterally the 'stomach bag': the stomach viewed as a receptacle that receives and holds food. It is the anatomical or vividly figurative choice, not the everyday word for a stomach ache or hunger.
  彼かれは胃袋いぶくろに食べ物たべものを詰め込つめこんだ。↗

  He loaded his stomach with food.
• 下っ腹したっぱらCommon
  nounThe lower abdomen or lower belly, the part below the navel. Use it only when 'stomach' refers to that lower region; it is not a general word for the stomach and is really about the under-belly area.

Use 「お腹」 for the everyday belly/tummy, 腹 for a blunter abdominal sense, 胃 for the digestive organ, 胃袋 for that organ as an anatomical or metaphorical receptacle, and 「下っ腹」 for the lower belly.

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

• お腹おなかbelly
• 腹はらabdomen
• 胃いstomach
• 胃袋いぶくろstomach
• 下っ腹したっぱらabdomen
• 下腹したはらabdomen
• ガツstomach (esp. a pig's stomach or a cow's rumen)
• 胃の腑いのふstomach
• ストマックstomach
• 糞腸くそわたstomach
• 胸むねstomach