First taking the BAM brands out of the equation, how are things shaping up in Japan? From 2010 to 2016, premium sales for these makes were up 68%. Now individually: JLR +224% (LR +335% Jag +153%) Porsche +106% Volvo +87% Lexus +56% Alfa Romeo -3% Cadillac -7%. Infiniti and Acura are not sold here, which I think is a missed opportunity.
Summary: Land Rover and Jaguar but neither of those marques are that big even now. Over three times the number of Land Rovers are sold in Korea, that being a much smaller market as well. Lexus has 63% of the sales for those listed here which the least of what you would expect.
Now adding the other brands to the BAM marques, how do things stack up? Total sales growth goes to 80%, due to the BAM brands increasing 87%. The 'Others' took 35% in 2010 and 32% in 2016. The BAM marques took 68% of all premium sales in 2016.
Summary: The BAM trio do well here with Mercedes and MINI growing the most in recent years. Audi is a much smaller here than other countries with just 11% of premium sales. MINI almost outsells it! The three biggest in 2016 were 1) BMW & Mini, 2) Mercedes 3) Lexus.
Text source: RayCee.