What the world can learn from Japan’s robots www.bbc.com

Japan is changing: a rapidly ageing society, a record-breaking influx of visitors from overseas, and more robots than ever.
As they walk through the glass doors, they pass two security guards, each dutifully flanking the passage in stern silence.
It all seems pretty unremarkable, until you realise one of those security guards is a robot.
Right now, the police bot – whose built-in camera allows guards downstairs to see things from the robot’s point of view – is one of only two prototypes in the country.
But Matsui says companies in China and South Korea are interested in his company's work, which also includes cleaning robots for use in houses and schools.