Samoa recently changed to driving on the left in large part to gain access to cheap Japanese cars being shipped over from families in NZ and Australia.
Same for South East Asia.
To be fair, Thailand and Indonesia do drive on the wrong side of the road, but both have fairly strong automotive lobbies that try and keep the cars out. Eastern Russia is not only close to Japan, it is (a) not Korea (who love Korean cars), and (b) it is really far away form Moscow's influence in getting them to buy more expensive cars of lesser quality made much further away.