If you look closely to the window sticker on the Lexus when you go car shopping, you will see a white sticker mostly on the rear passenger side window behind the driver's sit and it states as follows:
"This vehicle's parts are 55% USA/Canadian and 35% Japanese".
I dont know where the other 10% is lost, however 55% of the car is equipped with crappy American parts made for Lexus. And only 35% of it is actually Japanese which is, The Engine. The transmission, and probably the ECM, BCM, and TCM.
* ECM = Engine Control Module
** BCM = Body Control Module
*** TCM = Transmiddion Control module