How to say "whenever" in Japanese

• 都度つどCommon
  nounCovers 'each (every) time; whenever' in the event-repeated sense, with a formal, written flavor typical of notices and business documents. Rarely the casual spoken choice; たびに usually fits conversation better.
• たびにCommon
  adverbThe everyday word for 'whenever (something happens)': every time a recurring event occurs, something follows. Use it for habitual ties between events, as in feeling nervous each time an occasion arises.
  そこに行いくたびに彼女かのじょに会あう。↗

  Every time I go there, I meet her.
• いつでもJLPT N3approx.Common
  adverbMeans 'whenever (you like)', i.e. 'at any time' — free choice of timing rather than repetition of events. Use it when offering or stating that something may be done any time the listener wishes.
  あなたはいつでも歓迎かんげいされています。↗

  You will be welcome at any time.

Use 「たびに」 for 'whenever something happens' (each time an event occurs), 「いつでも」 for 'whenever you like' (any time freely), and 都度 for the formal written 'each/every time'.

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

• 都度つどeach (every) time
• たびにeach time
• につけevery time
• につけてevery time
• いつでも(at) any time