Since this thread has been resurrected, I thought I'd take the opportunity to clear up some misconceptions. The Mikado brand seen in the USA is not a Miyata brand, though there was an association. That Mikado brand was created circa 1978 by Toyoda, a Japanese trading company who imported and distributed Miyata during the 1970s. Consequently, there is a family resemblance and a good chance that many of the Mikado models were also manufactured by Miyata. However, Toyoda was free to source the bicycles from other companies.
The Canadian Mikado brand with which I familiar, was owned and manufactured by Procycle of Quebec, who manufactured Peugeot under license along with their own Velo Sport brand, prior to obtaining CCM and several other Canadian brands.