Translation guide
In Japanese, questions are primarily marked by the sentence-final particle か (ka) in formal/polite speech, while casual speech often uses rising intonation or the particle の (no). This guide covers how to form questions naturally.
Specifically for questions with nouns or na-adjectives in polite form.
お元気ですか。
How are you? (lit. Are you well?)
The speaker wants to ask a question in a casual conversation.
Add の to the end of a casual sentence to ask a question, often with rising intonation. Common in informal speech.
In very casual speech, simply raising the intonation at the end of a statement can turn it into a question. Often used among close friends.
Without context, this can sound blunt. Use with close friends or in informal situations.
明日、来る？
Coming tomorrow?
A casual, somewhat masculine question particle. Softer than plain rising intonation but still informal.
元気かい？
You doing okay?
The speaker wants to embed a question within a larger sentence, such as 'I don't know what it is.'
Use か after the embedded question clause. No question mark is used in writing.
それが何か分かりません。
I don't know what that is.
彼が来るかどうか知っていますか。
Do you know whether he will come?
Used for yes/no embedded questions, meaning 'whether or not'.
行くかどうかまだ決めていません。
I haven't decided whether I'll go or not.
The speaker uses a question form to make a statement, not to seek an answer.
Used to seek agreement or soften a statement, similar to 'isn't it?' or 'right?'.
これ、美味しいじゃない？
This is delicious, isn't it?
Formal/written equivalent of じゃない, used for rhetorical emphasis.
それは問題ではないか。
Isn't that a problem?
Using か in casual speech can sound overly blunt or masculine. Instead, use の or rising intonation.
Question words like 何 (what), 誰 (who), どこ (where) are often used with か to form questions. In polite speech, ですか follows; in casual speech, なの？ or just the question word with rising intonation.