Final Fantasy Crystal Chronicles has a couple of nice songs, my pick is the title theme: Kaze No Ne
I don't speak Japanese, so I'm just judging it on a musical basis. I really like Yae's voice and the harmonies and arrangement are lovely. The English release of the game 'dubbed' these songs and the American singer uses far too much vibrato and doesn't pull off the harmonies nearly as well, I'd rather listen to beautiful singing that I don't understand.
As a bonus, here's the credits theme from the Japanese version: Starry Moonlit Night
It`s not important if it has vocals or not.
Can't have a song without vocals...