I have a Nashbar 12 speed "Sport RX" that has SunTour Arx derailleurs, Sugino cranks, double butted ChromeMoly frame & fork. It has a "made in Japan" sticker, a rising sun logo on the back of the seat tube & on one chainstay the motto "The finest Bicycle in the World". It has a good ride but I got a lot of kidding from fellow cyclists: Your bike is such a liar; How's Clinton today? Haven't you taped over that decal yet? etc.
Could it have been made by sekine? Don