You can't see much from that one picture of music boxes (no. 5), but there's a large store in Otaru, Hokkaido called Otaru Orgel (apparently an "orgel" is オルゴール orugōru, the japanese word for a music box, thanks Wikipedia). There that I discovered a tune that was once lost to my memory - Sakura, Sakura, which I first heard from a keychain that we bought in Tokyo more than a decade ago. Beautiful shop, beautiful tunes in each octagonal jewel.