How to say "immediately" in Japanese

Choosing the right word
  • すぐJLPT N5approx.Common
    adverb, nounThe all-purpose everyday word for 'immediately' or 'right away': something happens or is done without delay, in ordinary speech and writing alike.
    彼かれは警官けいかんを見みるとすぐ、逃にげた。↗
    As soon as he saw a policeman, he ran away.
  • 早速さっそくJLPT N2approx.Common
    adverbFor the 'without delay' sense of getting on with something: it fits when you start a task, follow up, or reply promptly instead of waiting.
    さっそく仕事しごとにとりかかりましょう。↗
    I will set about my task at once.
  • さっさとJLPT N2approx.Common
    adverbAs an onomatopoeic word it paints quick, brisk action rather than mere timing; it is also used to tell someone to hurry up and get on with it.
    さっさと宿題しゅくだいをしなさい。↗
    Do your homework without delay.
  • 直ちにただちにJLPT N3approx.Common
    adverbA stiff, formal word for 'at once', typical of official announcements, warnings and instructions, where an immediate response or action is demanded.
    我々われわれは直ただちにこの問題もんだいに対処たいしょしなければならない。↗
    We should deal with this matter without delay.
  • たちまちJLPT N2approx.Common
    adverbBest for the 'in an instant' sense: something comes about or changes within a moment, describing how fast a situation develops rather than how promptly a person acts.
    The tickets were sold out in a moment.

Use 「すぐ」 for the everyday 'right away', 早速 for starting something without delay, 「さっさと」 for brisk quick action, 「直ちに」 in formal instructions, and 「たちまち」 when something happens in an instant.

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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