Soundwave on 23 May 2015
The other thing I would add is gaming seems more "mainstream" in Japan. It's not really a big deal if you're an adult using a 3DS on a subway or something, although it's not as hugely commonplace as you'd expect either (kids with 3DS' is still the primary audience you see).
But you'll see things like a Monster Hunter watch in a high end watch shop ... and that isn't some gimmicky cheap watch either, it's a high end watch maker with a Monster Hunter model for Japan. Stuff like that ... you don't really see in the US.
Anime/manga/gaming culture is just much more mainstream in Japan. Like I said with the arcade/packchino areas, there's a fair number of adults and women that frequent them, which is not common in the US.
