There was a Japanese five speed crankset once; I've seen pictures of a Miyata-branded one on a Miyata bicycle. Someone posted it on the Folding Bike forum a year or two ago.

This may or may not be a useful item; depends on the gear range and the price, among other things all not mentioned on that totally lame web page.

Edit:
Sorry, got the details wrong. It was a Miyata 5-speed internally geared crank mounted on a Strida, which would make a totally cool commuter. Here's the thread.