i don't know it completly, but i know a few words en such that could help <D
kawaii-cute
baka-idiot, fool, moron, etc
watashi- i(formal)
hai-yes
sayornara- good bye
iie- no
dame- bad
ohio- good morning
onee-chan- big sister
onii-chan- big brother
bento- luch box
__________________
these are formal ways of adressing people. kind of like miss, mrs, mister. in japan, they call people by their last name, unless they're close to them.
san- this is the main formal way of adressing somebody. mainly people you arn't really freinds with.
kun- this is a way people adress guy freinds. although i have seen it used for girls before. like thoru in fruits basket
chan- this is a term used for people one is close with with. like freinds or family. calling someone you don't know very well this is can be concidered an insult.
boku- i don't know much about this one. but i think it's a mean way to adress boys or something. almost like baka.
there other ones and other jap. words i knnow. but i can't think of any right now...