Police in Japan also go door-to-door introducing themselves to residents, gathering basic info (what is your job, how many people living here, etc), sharing details about recent crime in the neighborhood, etc. [1] While it is supposedly voluntary, I think just about everyone complies.

I personally have always played along as the police are always very friendly when making rounds, and wish to maintain that friendly relationship. I also consider myself a beneficiary of the low crime rates here, and consider participation to be a civic responsibility.

http://www.accessj.com/2013/02/police-home-visits.html

You need to carry a passport if you're a tourist in Japan. Although I did forget once and nobody cared, it isn't guaranteed.