A diet of rice and tofu, plenty of regular, gentle exercise and excellent hospitals: the Japanese have nailed the formula for getting old prolifically. With a little less than 30% of the population over 65, Japanese society is now officially termed as “super-aged.” Meanwhile, thanks to a low birth rate and an ingrained opposition to immigration, the total number of people is falling dramatically. Each year, there are fewer younger people to look after more older ones. It’s a slow-burn economic crisis.