It's NOT Japanese Music
I really loved the movie...but please realize that there is NO Japanese music in the movie. I mean, look at the title! It doesn't say anything like "Akira Kurosawa." It reads, "Hoy te amo!" And the credits clearly state "Musica: Belanova - Tus Hojos." (Literally: your eyes) Even if you don't know any Spanish it should be really really easy to see that this isn't Japanese! So no, you're not racist, just ignorant.
At any rate, I loved the animation. I'd love to see more in the future...and don't mind people who can't even recognize major language differences.