- いかが: how (in what way)
- いくつ: how many
- いくら: how much
- いつ: when
- だれ (誰): who
- どう: how
- どうして: why (in what way, for what purpose)
- どこ: where (what place)
- どちら: which way
- どなた: who (polite)
- どの: which
- どれ: which (of three or more)
- どんな: what kind of
- なぜ: why
- なぜ (何故): why
- なに (何): what
- なん (何~): what sort of