Just a standard Intelligent Controller Cyberstick. It was created by both Sharp and Micomsoft working togheather.
Very easy to find in Japan. I'd assume all you need is a converter cable to go from X68k/MSX/Towns DB9
to PCE pinout if the games do in fact support it. I have the sharp version. They are the exact same internally,
if I remember right Micomsoft was THE stick maker back then, and Sharp approached them about the idea, Micomsoft agreed but wanted to sell it under their own brand as well.
Edit, looking closely at the flyer, it's certainly a standard cyberstick with a cable adapter. I'll have to rig one up and try. Though ironically enough I don't any of the compatible games on PCE LOL.