URGENT: Movie titolo

Oh my im going insane!! I seminare, scrofa this movie at costco last night that i really wanted to watch but my Dad wouldn't get it for me:( but now i cant remember the name! I know its about a girl who lives in Giappone after world war 1 o 2. She meets a boy an thats all i can remember. Please help! I'll fan whoever can give the right answer. They will also get props:)