How to say "promise" in Japanese

Choosing the right word
  • 約束やくそくJLPT N4approx.Common
    noun, suru verb, transitive verbThe word for a promise in the commitment sense: an agreement between people to do or not do something, or one's word. Use it for making, keeping and breaking promises.
    自分じぶんが約束やくそくしたことはちゃんと実行じっこうするように最善さいぜんを尽つくすべきだ。↗
    You should do your best to carry out your promises.
  • 見込みみこみJLPT N1approx.Common
    nounNot a promise between people: it covers 'promise' as likelihood or potential — the hope, possibility or chance that something will happen or succeed.
    そんな計画けいかくはほとんど成功せいこうする見込みこみはありません。↗
    Such a plan can hardly succeed.
  • 言質げんちCommon
    nounA promise in the sense of a pledge: words given that one is then held to. Typical when you get a commitment out of someone or hold them to what they said.
    彼かれは言質げんちをとられた。↗
    He got himself committed to it.
  • 将来性しょうらいせいCommon
    nounCovers 'promise' only as future potential: how promising a person or thing is, its prospects of developing well. It is not a word for a commitment made to someone.
    この仕事しごとには将来性しょうらいせいがない。↗
    There is no future in this job.
  • 行く末ゆくすえCommon
    nounMeans one's future, fate or prospects — how a person's life or something's course turns out. Its 'promise' sense is marginal; for a promise between people this is not the word you want.
    会社かいしゃの行く末ゆくすえは彼かれの肩かたに掛かかっていた。↗
    He bore the future of the company on his shoulders.

Choose 約束 for a promise made to someone and 言質 for a pledge you hold them to; when 'promise' means potential or likely success rather than a commitment, pick 「見込み」, 将来性 or 「行く末」.

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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