When I was in Japan back in the 80's there were car "boutiques" everywhere. Wheels, body kits, accessories, electronics, you name it and it was available.
I remember the little tiny cars (made a Mini look like a Cadillac) that had 2 stroke motorcycle engines...you could hear them coming a mile away!
Bart did you guys hit any of the big shopping areas? In Hiroshima there was a store called Diechi's (sp?) that was like wallmart on steroids...think wallyworld but 8 stories, each one specializing in a certain thing (stereo, video, cloothes, appliances...) but all high end stuff! The floor for stereo had a sound room with $50,000 dollar speaker systems, Krell amps, Nachamichi cassette players (which I own one of) and other high dollar toys (remember these prices were in the 80's). Also in Hiroshima was the A dome...ground zero for the bomb. There is some pretty somber stuff there!