population~sir david attenborough, page-52

Geiger Counter

Japan is generally anti-immigration, although has encouraged immigration of ethnic Japanese from Peru, Brazil etc

You are right that an ageing population causes problems with the economy due to the need for younger people to support an ageing population, although retirement in Japan is often only once people are unable to do the job anymore. The Japanese population is falling now, so the country is already adjusting to the economic impacts.

Buy Japanese real estate - I think not