You can’t spend 30 seconds in Tokyo and not realize that large North American-style vehicles will not work there. There is no space. The very few Tokyoites who are fortunate enough to be able afford a house with a parking spot will still have just enough space to park a Kei car in it with only a few centimetres to spare.

They will not buy US cars because unless you are extremely rich you can’t afford to live with one there.