Yamato Koki Rippaflex
This has a lot of the looks of an early Tougodo model, but McKeown identifies it with Yamato, who produced a wide range of copies of Western cameras in the 'fifties and early 'sixties. Certainly there are some detail differences from the Tougodo contemporaries, but a lot of seemingly common parts too.
Unusually, this camera only appears in McKeown and not Sugiyama or other Japanese reference works.
Taking lens is Tri-Lausar 80mm f3.5
Shutter unnamed 1 to 1/300