At least they're interesting to me, if only for the pictures. I wonder if someone who reads Japanese can tell us more about what they say?
This sort of looks like imitations of old parts that they manufacture in house:
http://www.h2.dion.ne.jp/
Alex Singers at a recent exhibit?:
http://www1.odn.ne.jp/
A museum of bicycle gears?:
http://www1.odn.ne.jp/
Ken Stagg
Tacoma, Washington