Translation guide
The English question word 'where' is used to ask about location, direction, or origin. In Japanese, the equivalent question word is どこ (doko), but its usage differs depending on whether you are asking about a place of existence, a destination, a source, or using it in indirect questions. Japanese also uses different particles and politeness levels, and often omits the subject when clear from context.
To ask where something or someone is located.
The standard polite pattern for asking where a noun (N) is. どこ means 'where', and ですか is the polite question ending. Replace N with the thing or person you are asking about.
トイレはどこですか。
Where is the restroom?
駅はどこですか。
Where is the station?
More specific pattern for inanimate objects, using the verb ある (to exist). に marks the location. Polite form.
本はどこにありますか。
Where is the book?
Pattern for living things (people, animals), using the verb いる (to exist). Polite form.
先生はどこにいますか。
Where is the teacher?
Very casual, used among close friends or family. Drops the topic and copula. Can sound blunt if used inappropriately.
ねえ、どこ？
Hey, where are you?
To ask where someone is going or where something is being sent.
Polite pattern using the particle へ (e) to indicate direction/destination. 行きます is the polite form of 'go'. Can also use に instead of へ with similar meaning.
夏休みはどこへ行きますか。
Where will you go for summer vacation?
Using に instead of へ. Slightly more concrete destination nuance, but often interchangeable.
To ask where someone or something comes from.
Polite pattern using から (from). 来ました is the polite past of 来る (to come).
どこから来ましたか。
Where are you from? (Where did you come from?)
Specifically asks about one's hometown or origin (出身). More natural for 'Where are you from?' in the sense of nationality or hometown.
To embed 'where' in a larger sentence, such as 'I know where it is' or 'Tell me where to go'.
Pattern for 'Do you know where...?' どこか means 'somewhere' or 'where' in an indirect question. The verb わかる (to understand/know) is used.
駅がどこかわかりますか。
Do you know where the station is?
More explicit pattern using 知っている (to know). The embedded question ends with か.
To ask 'where' when choosing from known locations.
Used when asking 'which place is good?' or 'where would you like to go?'. が marks the subject.
レストランはどこがいいですか。
Which restaurant would you like? (Where is good for a restaurant?)
The correct pattern is Nはどこですか, not Nにどこですか. The particle に is not used with です in this pattern.
In Japanese, if the subject is clear from context, you can simply ask どこですか？ (Where is it?) or どこへ？ (Where to?). This is very natural.
一番近いコンビニはどこですか。
Where is the nearest convenience store?
明日どこに行きますか。
Where are you going tomorrow?
Casual spoken form. の adds explanatory or softening tone. Used among friends.
今からどこ行くの？
Where are you going now?
出身はどこですか。
Where are you from? (What is your hometown?)
鍵がどこにあるか知っていますか。
Do you know where the keys are?