How to say "gradually" in Japanese

Choosing the right word
  • だんだんJLPT N1approx.Common
    adverb (with と)The everyday spoken word for a change that becomes more and more noticeable as it goes on, such as weather turning colder or someone getting better at something; usually written in kana alone.
    だんだん暖あたたかくなります。↗
    It will get warmer and warmer.
  • adverb (with と)An onomatopoeic word for something advancing slowly but steadily, often with a sense of creeping pressure, as when an opponent closes in little by little or discomfort slowly builds.
  • 漸次ぜんじCommon
    adverb, no-adjectiveA formal, written-style word for gradual, incremental change; it fits documents, announcements, and careful explanations, and is seldom what you want in ordinary conversation, where だんだん or 徐々に sounds natural.
  • 徐々にじょじょにJLPT N3approx.Common
    adverbThe neutral, all-purpose word for steady, measured change, such as a pace picking up, prices rising, or a patient improving little by little; at home in both writing and speech.
    単語たんごは徐々じょじょに増ふえますので、こまめにチェックしてください。↗
    The words covered are steadily increasing, so check frequently.
  • 次第にしだいにCommon
    adverbGradual change that unfolds naturally as time passes or as a situation develops, like the sky darkening toward evening or something becoming clear bit by bit.
    日ひが経たつにつれて、天気てんきは次第しだいに悪化あっかしつつあった。↗
    The weather was getting worse and worse as the day went on.

Use 「だんだん」 in everyday speech for change that keeps building, 「徐々に」 or 「次第に」 for steadier, more measured change, 漸次 in formal writing, and 「ジワジワ」 for something creeping ahead slowly but steadily.

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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