The country of Japan, but portrayed as a world that works like what exported Japanese media have taught us.
In Western works, it might serve as a parody of the anime fandom in general, or Western perceptions of Japan.. In Japanese works, it might be a jab at Occidental Otaku who seem to actually believe in this, or lampshaded to emphasize that this particular work is more realistic than that.
The [...] [tvtropes.org]