100% depends on the model of car. Both American (Camaro, Corvette, Charger, Challenger etc..) and the Japanese (BR-Z, GTR, MX-5, STI, EVO etc..) make great cars; but they also make absolutely terrible cars (Japanese - Civic, Camry, Prius, Altima, other boring *** cars for old people, American - Cavalier, other ugly pieces of crap). But the Japanese do make worse terrible cars like the Camry (especially those older POS ones), but they also make better good cars (like the GTR)
Also I may be a bit biased since I have an Acura.