Japan has stagnated and had debt problems over those 40 years. May I ask you if you saw these as they began to accrue and if you think there is a long term strategy to address them?
Seems to me as an alien to the culture, that Japan is uniquely happy to continue on conservatively (culturally) without giving in to medium term fixes(e.g. immigration) but with no long term plan for the economics or population. Is this because of a different cultural view on those things and whether they are successes, or failures?