Either way, it works out to help keep the environment welcoming through culture conservation.
One of the reasons for the Japanese economy’s stagnation over the last 20+ years is a lot of government spending on things that are not contributing to a healthy economy. I’m thinking about huge infrastructure projects but I’m sure this extends too many other aspects of how the economy is run.
That comes to mind anyways as "Big Infrastructure".
Wasteful Big Infrastructure would more be doubling down on the seawalls that did not work in 2011 in Tohoku; in some cases those seawalls actively made things worse.
Seems economically inefficient though that’s not really the goal.
Coresidence of parents and children have fallen in half over two decades from 50% to 24%: https://academic.oup.com/psychsocgerontology/article/62/5/S3...
Here's the wikipedia article about elderly dying in Japan and being undiscovered due to being lonely and forgotten: https://en.wikipedia.org/wiki/Kodokushi
It is close to 50 years after the fall of fertility rate below replacement in Japan; so soon there will be increasing numbers of elders that not only do not have grandchildren, but don't have children either.