BGM created for a picture book movie titled "Shin Urashima Taro" is now available as free BGM.
The music features a variety of instruments, including koto and shakuhachi, as well as electric, accordion, and orchestral instruments that show various expressions as the picture book unfolds.
I think it is quite difficult to use as BGM material, but if you cut out parts of it, you should be able to use some parts in a good way.