As with the Shinko sportbike tires, these tires look like they're basically old Yokohama tires from 20 years ago.
I heard that Shinko bought the tire molds from Yokohama and are producing them under their own name.
I used the Yokohama version of these tires in the late 1980s.
Nothing extremely fantastically wonderful if compared to a top-quality Bridgestone, Dunlop, Michelin, etc., but they'll be mucho better than the stock street-biased tires off road. :)