I have a bicycle named YAHICHI.
It is an all wheel drive bicycle. This is a 4WD equivalent of a bicycle with one legged fork and some clever mechanics transferring the pedal power to the front wheel. It has 20" wheels with Dunlop valves on the inner tubes.
Seems that it needs some maintenance as the chain - there are 4-5 of them- keeps falling off.
Has anyone come acorss these bikes? Seems like too heavy to ride. They don't seem to be too popular elsewhere except in Japan as a search ends up in Japanese sites. The price was JY 54800 for a similar model, about $500.
Here is a link to an image. Mine is yellow like the one in the middle.