It wa only there for a few weeks, we were lucky to see it, but, yes, being a geek in Japan is an accepted lifestyle and not an oddity.
I am certain that there is no equivelant area to Akihabara in Tokyo or Den Den Town in Osaka anywhere else in the world........
Five storey model shops opposite each other........
Manga in every convenience store.......
Five storey video game emporiums....
Pachinko parlours.....
and the kind of Internet Cafe which is miles away from anything seen in the UK.