What the stamp says.
I lived in Japan for 4 months, which isn't a really long time, but I thoroughly enjoyed it. I went to get immersed in another culture and society, and to learn more about myself. I absolutely did not go to Japan for its shallow and hardly unique aesthetic pop-culture appeal, which is unfortunately the biggest reason most people visit.
I think everybody in the entire fucking world is disgusted by these people who think Japan is made of cotton candy and rainbows and who think everybody in Japan will love them because they "observe hentai and otaku culture" via the internet, and who clog up the aisles at Little Tokyo supermarkets. You know, the people who think they can learn everything there is to know about Japanese society and culture from anime and J-drama, and who think wearing Lolita and speaking broken Japanese in public makes them "cultured". Yeah, no. Fuck you, faggot.
You're embarrassing to not only Japanese people, but you're embarrassing to anybody and everybody who has even a remote interest in Japan or Japanese culture. You're setting a horrendous example for other tourists/travelers who visit the country.
Japan is not what you see from anime, children. Get cultured and get less ignorant.