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Japanese dictionary

How to say "when" in Japanese

いつ · itsu

"When?" as a question is いつ (itsu). "When I was a child" uses 〜とき (toki): 子どものとき.

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Ways to say "when" in Japanese

JapaneseWhen to use it
いつ · itsuWhen (question).
〜とき · tokiWhen (a time something happens).
〜たら · taraWhen; if (after something happens).

How to use it

"When you arrive, call me" uses 〜たら: 着いたら電話してください.

"Since when?" is いつから (itsu kara).

Example sentences

Questions

What is the difference between いつ and とき?

いつ (itsu) asks "when?" とき (toki) describes the time something happens: 暇なとき (when I'm free).

How do you say "Call me when you arrive" in Japanese?

Say 着いたら電話してください (tsuitara denwa shite kudasai).

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