Hello! I just wanted to let you know that the Eastern letters are Japanese, of which I speak a little of, although I'm not the best. Luckily, the words on the music book are very easy and basic for my level, so I'd like to let you know they are 女の子 (onna no co), meaning "little girl" "daughter" or "young woman". Let me know if you ever need more Japanese translated, I should be able to do even the hard bits given enough time to look up the bits I don't know.