っけWhat was it again?
っけ marks a casual question that searches the speaker's memory or checks information they believe they once knew. It often corresponds to “again” in questions such as “What was the name again?”
A question based on prior memory
The essential idea is not simply uncertainty. The speaker has a reason to think the answer is already somewhere in their memory: it may have appeared in an earlier conversation, a schedule, a promise, an introduction, or a past experience. The question asks either the listener or the speaker's own memory to supply it again.
Recalling facts and arrangements
あの店、何時に閉まるんだっけ。
What time did that shop close again?
AnalyzeThe speaker has previously seen or heard the shop's hours.
次の会議は月曜日だっけ。
The next meeting is on Monday, right? I can't quite remember.
AnalyzeAlthough the form looks past-like, the meeting is in the future.
この辺、夜は静かだっけ。
Was this area quiet at night? I forget.
AnalyzeThe speaker is trying to recall a previous impression of the area.
The form does not necessarily refer to the past
The frequent endings たっけ and だっけ reflect the act of recalling, not necessarily the time of the event. The forgotten information can concern a present fact or a future plan. With a nonpast verb, んだっけ is especially common.
Checking with someone familiar
明日の集合、九時だっけ？
We are meeting at nine tomorrow, right? I forget.
Analyzeううん、九時半だよ。
No, nine thirty.
AnalyzeA is not asking about an unknown plan; the meeting time was already arranged.
Self-talk and polite checking
The same ending works in self-directed questions. Polite past forms are also possible when checking something previously discussed.
鍵をどこに置いたっけ。
Where did I put my keys again?
AnalyzeThis is a natural self-talk question while searching one's memory.
あの方のお名前は何でしたっけ。
What was that person's name again?
AnalyzeThe speaker was previously told the name and now asks politely for a reminder.
先生は何とおっしゃいましたっけ。
What did the teacher say again?
AnalyzeThe polite verb form respects the teacher, while the memory-searching interaction remains conversational.
Remembering versus open wondering
っけ searches prior knowledge. By contrast, かな can express open wondering even when the speaker has never known the answer.
More examples
さっき窓を閉めたっけ。
Did I close the window earlier? I can't remember.
Analyzeこの薬、食後に飲むんだっけ。
Was I supposed to take this medicine after meals?
Analyze約束したのは三時だっけ、四時だっけ。
Did we agree on three or four? I forget.
Analyze旅行の日程、もう佐藤さんに送ったっけ。
Did I already send the trip itinerary to Sato?
Analyze駅前の本屋、日曜日も開いているんだっけ。
Was the bookstore by the station open on Sundays too?
Analyze前回はどの資料を使いましたっけ。
Which materials did we use last time again?
Analyze