Japanese Robot Guards to Patrol Shops And Offices
Clarinase writes "Robots will be patrolling Japan's streets, offices, shopping malls and other public places for the safety of the people. Guardrobo D1 is equipped with a camera and sensors to detect any signs of trouble. It will then alert the human guards via radio with camera footage of possible troubles. This is one of the technological advancement vital to the aging population of Japan, where 1 in 5 Japanese are over 65 years old."
First, yes they are longer lived than Americans. Second, the birth rate has been much lower than in the U.S. Additionally, immigratin is slower to Japan so there are fewer foreigners upsetting the averages.
Read Heinlein's 1953 Revolt in 2100, now more than ever.
http://www.robotcombat.com/oldglory1.html