Japan's Top Inventions S2023E02 - Automatic Door Sensors / Banknote Printing Machines

The fascinating stories and secrets behind hit Japanese products, plus parts and machines that boast the top share of niche markets. In the first half: the story behind automatic door sensors which detect people using the far-infrared radiation they emit. In the second half: banknote printing machines used in Japan and around the world, in places like the UK and India.