How to say "enough" in Japanese

Choosing the right word
  • 十分じゅうぶんJLPT N4approx.Common
    na-adjectiveThe default word for 'enough; sufficient; adequate'. Use it when saying a quantity, time, or quality is sufficient for a purpose, as in having enough money or enough preparation.
    私はこの本ほんを買かうのに十分じゅうぶんなお金かねを持もっている。↗
    I have enough money to buy this book.
  • たくさんJLPT N5approx.Common
    no-adjective, na-adjective, adverbCovers 'enough' in the sense of plenty or a large amount. It emphasizes abundance rather than sufficiency, so it suits contexts like having enough food or plenty of time, and is usually written in kana.
  • 良いよいJLPT N5approx.Common
    i-adjectiveMatches 'enough' mainly through the sense 'sufficient; ready; prepared'. It is really the ordinary word for 'good', so for 'enough' it appears chiefly in expressions meaning 'that will do' or 'that is fine'.
  • 結構けっこうJLPT N5approx.Common
    na-adjectiveCovers 'enough' in the sense 'sufficient; satisfactory; fine'. It is especially the word for politely declining an offer — 'I've had enough, thank you' — and for saying something is fine as it is.
    どちらの日ひでも結構けっこうです。↗
    Either day is OK.
  • 分ぶんJLPT N3approx.Common
    noun (suffix)Matches 'enough' only via the gloss 'enough (for)'. Its core meaning is 'amount; worth', as in two days' worth, so it is the word for an amount sufficient for someone or something, not 'enough' in general.
    あなたは家賃やちんの三さんヶ月かげつ分ぶんを資金しきんとして払はらわなければならない。↗
    You are required to provide three months' rent in deposit.

Use 十分 for the general sense of 'enough/sufficient', 「たくさん」 for a large quantity, 結構 when politely declining as 'I've had enough', 「良い」 mainly in set responses meaning 'that's fine', and 分 for 'enough for' a stated amount.

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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