I've got 11 of these, and it makes me curious. I think they found their way to me via my grandparents, but they are dead, so I have absolutely no clue about how they got them. I have found that the logo on the back is looking much like the Fukagawa logo, and they have been making pretty things since the 1800's.
Is it worth the bother of putting these on eBay, that's really what I'm asking. They need a better home than I can provide =)