No - unless your definition of a 'Japanese Domestic only" market includes Asia Pacific (Rotary exports from 1969) Europe (1970) and North America (1971).Lots of models, but no volume, and they were Japanese Domestic only.
Gosh here's an R100 on the cover of a non-Japanese magazine I bought in July 1969...
Again no - it took Mazda six years 1979~1985 to sell 470,000 Series 1/2 RX7 (combined).The Rx-7 outsold all of these combined by a long shot, yet, it's still a low volume product.
Yet Mazda sold 300,000 Rotors in only 30 months from 1971. Btw how is Cadillac doing these days?
More than one in every three Mazda cars built in 1971 had a rotary engine and similar in 1972~1973.
All in all, not a bad production average from a Company that - according to you - was in pre-'73 times "not that into rotaries"