How to say "quickly" in Japanese

• さっさとJLPT N2approx.Common
  adverbCovers 'quickly' as brisk promptness: getting something done at once, without dawdling. As a mimetic adverb it often carries a get-on-with-it tone, urging that a task be finished right away.
  さっさと宿題しゅくだいをしなさい。↗

  Do your homework without delay.
• 早々はやばやCommon
  adverb (with と)Here 'quickly' leans toward 'early': doing something sooner than expected or sooner than usual — leaving a gathering early, retiring sooner than planned — with the emphasis on earliness rather than speed of the action.
  彼かれは戦争せんそうが早々はやばやと終おわるとあてこんでいた。↗

  He gambled on the war coming to an early end.
• あっさりJLPT N1approx.Common
  adverb (with と), suru verbSeldom the word for actual speed: it really means doing something easily and readily, without effort or fuss, and can even describe refusing flatly. Use it only when 'quickly' means 'with no trouble'.
  彼かれはあっさり罪つみを白状はくじょうした。↗

  He confessed his crime frankly.
• パッとCommon
  adverbCovers 'quickly' when something happens in a flash — a single swift, sudden movement or disappearance. As a mimetic adverb it paints the action as an instantaneous, eye-catching snap.
  レース中ちゅうにその車くるまはぱっと燃え上もえあがった。↗

  The car burned up in the race.
• いち早くいちはやくCommon
  adverbCovers 'quickly' as promptness with an edge of being first: acting or responding without delay, often before others do — typical when rushing to a scene or picking up news early.
  ねずみはいち早はやく沈しずみそうな船ふねを見捨みすてる。↗

  Rats leave a sinking ship.

Choose 「さっさと」 for brisk, no-delay promptness, 早々 for acting sooner than expected, 「パッと」 for a flash-like instant, 「いち早く」 for being quickest to act or respond, and 「あっさり」 only when 'quickly' really means easily.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• さっさとquickly
• 早々はやばやearly
• あっさりeasily
• パッとsuddenly
• いち早くいちはやくpromptly
• さっとquickly (esp. actions)
• すっとstraight
• 急にきゅうにswiftly
• 急いでいそいでhurriedly
• とっさにat once
• つとquickly
• はよearly
• ちょろりquickly
• 早いことはやいことquickly
• とうquickly
• 疾くとくquickly
• つっとquickly
• ぱっぱとquickly
• ちょろっとquickly
• ぱらっとquickly (turning pages, opening a letter, etc.)
• ささっとquickly
• シュッとquickly
• ぱぱぱっとquickly
• もろくもquickly (succumb, collapse, etc.)
• くいっquickly (e.g. pushing up one's glasses)
• ずんずんrapidly
• てきぱきbriskly
• すたすた(walk) briskly
• ついとsuddenly
• 早いとこはやいとこpromptly
• がばっとsuddenly
• ちゃっちゃとlickety-split
• しゅんっwith a whoosh
• お早めにおはやめにsooner rather than later
• とっととat once
• すくすく(growing) quickly (esp. children, plants)
• ぺろり(eating up) quickly
• ぺろっと(eating up) quickly
• すたこらさっさhurriedly (escaping)
• どんどんrapidly
• 早くはやくquickly
• 早々そうそうhurriedly
• ざっとcursorily
• ぱたぱたquickly (making progress)
• くるりcompletely (wrapped in something)
• さくっquickly
• くっとquickly
• のびのび(growing) quickly
• ぺろぺろ(eating up) quickly
• ちゃんとquickly
• ばたばたquickly
• きりきりbriskly