Riv is buying bikes or the parts to build the bikes from Japan and putting their head badge. Riv has the market and they are sweet bikes. Love to own one one day.

That is exactly the same thing that was happening in the 70's and 80's till japans economy went to crap and the exchange rate got hosed. Miyata does all their own fabrications including Lugs. Miyata spec built a lot of other brands including Univega. Nothing wrong with that.

I suspect Miyata sells a lot of loose parts like lugs to other manufactures like Tsunoda that built my Lotus. I say that because I owed a Miyata and the head and BB lugs are identical and in fact that is a major reason why I bought that Lotus. Sheldon also confirms some of this. http://www.sheldonbrown.com/japan.html#miyata
The Seat stay lug and head lugs on the Atlantis look like those on my old six ten Miyata.