No, 2600 unofficial distibution COMBINED with 2800 sales is the best selling "console" in japan, but combining to things, one that is not even ofiicial, should probably not count.
Also, Jaguar never came out in japan. There were unofficial distibutors.
Also M2 is not the 3DO, so I am not sure what your point is with Panasonic buying out M2 plans, M2 never came out, and 3DO no longer had the rights to it when they sold it which is the exact opposite of the 3DO, which was region free btw.. Also it wasn't a brief period of time, it was pretty much until they pulled out. It happened pretty much everywhere.