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Question words in Japanese

Question words in Japanese
By mastering these question words, your conversational skills will be much stronger.

Kanji Hiragana Romaji Meaning
いくら ikura how much (money)
いつ itsu when
だれ  dare who
どう  dou how
どうして  doushite why
どうやって  dou yatte how
どこ  doko where
どの dono which
どのくらい donokurai how much (quantity); how long
どれ  dore which one; which (of three or more)
どんな donna what kind of
なに  nani what
何色 なにいろ nani iro what colour
いかが ikaga how (about)
なぜ naze why; how
何 with a measure word なん with a measure word
何月 なんがつ nangatsu which month; what month
何時 なんじ nanji what time; which hour
何日 なんにち nan nichi what date; what day; how many days
何曜日 なんようび nan youbi what day?; what day of the week?

い つ (itsu) : when

いつ きました か?
itsu kimashita ka?
When did you come?

ど こ (doko) : where

どこ から きました か?
doko kara kimashita ka?
Where did you come from?

どうして (doushite) : why

どうして きました か?
doushite kimashita ka?
Why did you come?

な ぜ (naze) : why


だ れ (dare) : who

だれが きました か。
dare ga kimashita ka?
Who came?

何 (nani) : what

nani wo kaimashita ka.
What did you buy?

Main points:
Even with the question word a ka is used. (Except in casual spoken Japanese.)
The question word is at the beginning, but after the topic particle wa if there is one.

あなた は だれ です か?
anata wa dare desu ka?
Who are you? (the question word dare is after the wa)