Browsing koban on the Metropolitan Police website, I found that each station has a surprising amount of personality. There is no uniform template; stations seem to invent their own approaches, and quite a few introduce local historic sites with real skill, so it never gets dull.
Incidentally, Palaceside Building in Takebashi is under Kojimachi Station, not Marunouchi Station as I noted the other day. This police station has Japan's core institutions in its area—the Diet, the Prime Minister's Office, the Supreme Court—and Palaceside Building sits at the northeast edge of the jurisdiction (the photo below is a map of the Kojimachi area, from the Kojimachi site "http://www.keishicho.metro.tokyo.jp/1/kojimachi/koban/koban.htm#koubantop").
Now, a comparison of koban web pages. One I rather like is Hikarigaoka Police Station (Nerima). What catches the eye is that each koban page carries not only current photos but old black-and-white pictures with a short timeline. The photo above is the Tagara koban page (http://www.keishicho.metro.tokyo.jp/10/hikarigaoka/), where you can see shots from the 1951 and 1973 rebuilds. Akasaka Police Station also posts sepia photos, but it does not say when they were taken—a bit of a pity.
