i got one of these sakae ringyo frames nos off ebay from jones bicycles in long beach for $150. the seatstays are interesting fastback sort of wishbone style. i tried to research but never found much. they were called "litage", "prizm", and there were other two versions i found that were essentially branded campagnolo and also 3rensho. there was also a carbon fiber version and mtn bike offering as well. late 80s i think.