Since coming to Japan, I've been feeling kind of like that every day. I never quite appreciated just how realistically anime portrays some things. Living right next to a school especially, I keep noticing little things like the school bell (they really do
all use the Big Ben chimes), and the general attitude to clubs and the like (the building where the school band and the school choir practise is close enough that I can hear them practising quite clearly, so I can tell just how much time they spend on it). It's really quite interesting. I had to go to my local ward office today too, and it was
just like the office Servant x Service is set in. And the ridiculously short skirts everyone in anime seems to wear, and which I thought were purely for fanservice and nothing else, are actually not all that uncommon, to my surprise.
It works the other way round, too. Watching the first episode of Golden Time the other day, things like the subway station they were in, and the amount of paperwork they'd been given by the university, were eerily similar to my own experiences here.
I haven't experienced any of the weirder things in anime really though, that I can think of (beyond Japan's usual level of weirdness, anyway). Which I guess is what you were actually asking about - sorry
