Translation guide
The English word 'whenever' is used to mean 'at any time that' or 'every time that'. In Japanese, the most natural way to express this depends on the structure of the sentence. Common patterns include using 〜ときはいつでも, 〜たびに, or conditional forms like 〜と/〜ば/〜たら combined with いつも. For questions meaning 'at whatever time', いつ〜ても is used.
Expressing that something happens on every occasion that something else occurs.
A straightforward pattern meaning 'whenever'. Place a verb or adjective in plain form before とき.
彼女に会うときはいつでも、嬉しくなる。
Whenever I see her, I feel happy.
Attaches to the dictionary form of a verb or noun+の. Emphasizes that each occurrence triggers the result.
彼は会議のたびに遅刻する。
He is late whenever there is a meeting.
Uses the conditional と with 必ず (without fail) to mean 'whenever A happens, B always occurs'. Often used for habitual or natural consequences.
春になると必ず花粉症になる。
Whenever spring comes, I get hay fever.
Conditional ば form + いつも. Similar to 〜と必ず but slightly more hypothetical.
彼がいればいつも楽しい。
Whenever he is here, it's fun.
Conditional たら + いつも. More colloquial and often used for specific past habits.
子供の頃、雨が降ったらいつも外で遊べなかった。
When I was a child, whenever it rained, I couldn't play outside.
Expressing that something can happen at any time, regardless of when.
A single word meaning 'anytime' or 'whenever'. Can be used alone or in a clause.
いつでも電話してください。
Please call me whenever.
Pattern meaning 'no matter when'. Insert a verb or adjective in て-form.
いつ来ても、歓迎します。
Whenever you come, you are welcome.
A formal/literary pattern meaning 'no matter when/even if'. Used with volitional form.
いつ彼が来ようが、準備はできている。
Whenever he may come, we are ready.
Used in questions to ask about an unspecified time.
Simply 'when'. In questions, 'whenever' can often be translated as いつ, with context implying 'at any time'.
いつが都合いいですか？
Whenever is convenient for you?
Both mean 'whenever', but 〜たびに emphasizes each individual occurrence, often with a nuance of 'every single time'. 〜ときはいつでも is more neutral and simply states that whenever the condition is met, the result follows.
彼は会うたびに違う帽子をかぶっている。
He wears a different hat every time I see him.
彼に会うときはいつでも、帽子をかぶっている。
Whenever I see him, he is wearing a hat.
Avoid directly translating 'whenever' as a single Japanese word. Japanese uses various grammatical structures depending on the meaning. Using いつも alone without a conditional or temporal clause often fails to convey 'whenever' correctly.