How to say "proposition" in Japanese

• 提案ていあんJLPT N3approx.Common
  noun, suru verb, transitive verbThe everyday word for a proposal or suggestion put forward for consideration, and the usual choice when 'proposition' means something offered, such as a business proposition or a plan.
  私の提案ていあんを承認しょうにんしていただけますか。↗

  Could you approve my proposal?
• 命題めいだいCommon
  no-adjectiveThe word for a proposition in the logical or philosophical sense: a statement that can be true or false, as in mathematics, logic, or academic argument. Not used for offers or suggestions.
• 建議けんぎCommon
  noun, suru verbA formal proposal or suggestion submitted to an authority, such as a motion or recommendation in official deliberations. A stiffer, more bureaucratic alternative to 提案 for 'proposition'.
• 発案はつあんCommon
  noun, suru verb, transitive verbBest thought of as the act of coming up with an idea or plan; it covers 'proposition' only in the loose sense of a new proposal or idea. Seldom the word you want for a logical proposition.
  遠慮えんりょせずに先生せんせいに話はなしてね。理解りかいできなければ発案はつあんして。↗

  Don't be shy about talking to the teacher; if you don't understand, use some initiative!
• 申し入れもうしいれCommon
  nounA proposal or offer formally conveyed to another party, such as a demand or request made in negotiations. Suits 'proposition' when it means something put to the other side, not a logical statement.
  あなたの申し入もうしいれを受け入うけいれてもよい。↗

  I'm willing to accept your offer.

For a proposal or suggestion use 提案; for a logical or philosophical proposition use 命題; 建議 and 発案 also denote formal or newly conceived proposals, and 「申し入れ」 covers proposals or offers made to another party.

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

• 提案ていあんproposal
• 命題めいだいproposition
• 建議けんぎproposition
• 発案はつあんsuggestion
• 申し入れもうしいれproposal
• 定理ていりtheorem
• 建議案けんぎあんproposition
• 提説ていせつproposed theory