How to say "casual" in Japanese

Choosing the right word
  • na-adjectiveThe direct equivalent for relaxed, informal style. Typical context: choosing what to wear — a casual outfit rather than formal dress — or describing an informal atmosphere.
  • 何気ないなにげないJLPT N1approx.Common
    i-adjectiveCovers 'casual' in the sense of offhand and unselfconscious — a casual remark, glance, or gesture made without deliberate intent. The nuance is unconcern, not relaxed style or dress.
    何なん気げなく言いった言葉ことばも誰だれかを傷きずつけることがある。↗
    A casual remark can hurt someone.
  • 思いがけないおもいがけないJLPT N2approx.Common
    i-adjectiveReally means 'unexpected' or 'by chance'. Its 'casual' sense is marginal, confined to unplanned happenings such as a chance meeting; seldom the word you want for casual dress or manner.
    彼かれは全まったく思おもいがけなく着ついた。↗
    He arrived quite out of the blue.
  • ラフCommon
    na-adjectiveUsed of casual clothing specifically: relaxed, informal dress. The natural choice when describing how someone is dressed; it does not cover casual remarks or manner.
  • 身軽みがるCommon
    na-adjectiveMeans light and unencumbered, as with light luggage. For clothing it suggests being dressed lightly so as to move freely; a marginal way to say 'casual', stressing lightness rather than style.

For informal style, especially in dress, use 「カジュアル」 or 「ラフ」; for an offhand, unselfconscious manner use 「何気ない」; 「思いがけない」 really means 'unexpected', while 身軽 stresses being lightly dressed and unencumbered.

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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