Moon River Pearls What Book Am I Thinking Of?

What book am i thinking of? - moon river pearls

is the title of the word moon in it pretty sure. and its relations with these two girls in the U.S. Army in the 2nd To live World War II. The two girls are friends, is a Japanese, and they were driven out, or something of the attack on Pearl Harbor. I read in 6th Class, so it is probably a lower level in reading, but id really want to know the title if you have read. The cover was a picture of a Japanese-style bridge over a river in the night .... Thank you!