who (plain)
dare
who (polite)
donata
where (plain)
doko
where (polite)
dochira
which one (of two)
dochira
which one (3 or more)
dore
which (of 2 something/someone)
dochira-no
which (of 3 or more something/someone)
dono
when
itsu
how (plain)
doo
how (polite)
ikaga
how much (money, measurable qty)
ikura
how many (countables)
ikutsu
how much (qty) / to what extent
dore-gurai
dono-gurai
how (travel)
doo-yatte
how (using what) / why
nan-de
doo-shite
why
naze
what name / what kind
doo-iu (doo-yuu)
what kind / what (+ something/someone)
donna
what
nan
what time
nan-ji
which day of the week
nan-yoobi
which day of the month
nan-nichi
which month
nan-gatsu