shimasen
gyakusatsu if your talking about Japanese war crimes they wont listen
to say grandpa in Japanese say "ojii-san" (pronounced : o-ge-san)
'(O)tanjoubi.'
ma o
oite, o, uchini, okeru, in
O genkidesu ka?
You can say "piasu o motteimasu" which means "I have an earring" in Japanese.
"werewolf" in japanese: okamiotko (with a straight line over the first "o")
鬼 /o ni/ is a good Japanese equivalent for what you are looking for.
Yoi yume o
ko o yadoshite iru
Anata o ketsujō shimasu