Canadian article from last year:
Whew! All this, and I've still managed to save the best bit for last -- the RX 330 is set to be built at Toyota Motor Manufacturing Canada (TMMC) in Cambridge, Ont., making it the first Lexus ever to be built outside of Japan. The models you're seeing in showrooms now were built at Lexus's Kyushu plant, but come September, production moves to the little plant that could. This award-winning manufacturing facility has been updated with separate weld and assembly facilities, and a brand-new 300,000-sq.-ft. paint shop dedicated exclusively to Lexus. By the time production begins, there will be more than three million sq. ft. under one roof. The Lexus move represents a $650 million investment and the creation of 700 new jobs. The plant will be able to produce 60,000 units of the RX 330, an important criteria given that the marque accounts for about 40% of Lexus's total sales.
The base RX330 is still built in Japan.