I expect Bill Gates will want to avoid drawing attention if he can ...
I like the area, but I'm kind of surprised that he would want a house there. I can think of nicer - but less celebrated - places. I get why Japanese people think it's special - but I don't suppose Gates cares much about the BCBG brand that comes with the imperial connection etc.
John Lennon spent some time there too, now that I think about it.