うちに vs あいだに

JLPT N3 Japanese self-study　·　~15 min　·　While you still can vs during that period

'Eat it while it's still hot.' 'While I'm still in Japan...' 'While he was sleeping, I cleaned up.' — うちに and あいだに look similar but feel very different.

What you'll learn

• うちに = while (state still holds) / before it changes — emphasizes seizing a fleeting opportunity
• ないうちに = before ~ happens (暗くならないうちに)
• あいだに = at some point within a period — no urgency, just 'during that time'

How to study “うちに vs あいだに”

“うちに vs あいだに” (While you still can vs during that period) is a JLPT N3 chapter of our free Japanese self-study course, about 15 min. You learn by doing — flashcard drills and fill-in-the-blank quizzes graded on the spot — completely free, with no sign-up and no ad wall. Once it clicks, read the matching in-depth explainer over in Grammar.