So the bank of japan ran a communism (textbook) style economy, but lied and said it was capitalist.
Then in the 80s, they believed their own sauce and hit a wall in the 90s.This brought about the changes into true US capitalist economics.
This is really a thread onto itself.
It's much more nefarious than that really. Neoliberal ideology started taking over in the US starting in the 70s and was in full effect in the 80s. The younger generation of Japanese economists who were educated in the US were brainwashed to believe that neoliberal greed is good and that it's possible to take all of a country's wealth for themselves.
They deliberately drew up plans and executed them to create a financial crisis in order to change the political mechanisms of running their economy so that they could implement neoliberal policies to benefit the elite. They circumvented democracy to change the economic and political landscape.
They basically started a war against their own people without the people realizing (at first) and they won. It was a takeover. This has been happening all around the world for the last 40 years, it's just that in Japan the shift seemed extra dramatic because they were doing so miraculously well before the takeover.
The documentary is based on the book by the same name. I recommend watching all of the interviews by its author Richard Werner (available on youtube). The guy's one of the best and realest economists you'll ever hear. It'll open your eyes to what is really going on with the economy and society.
He basically predicted a couple years ago (pre-corona) that central banks were going to manufacture or take advantage of another global crisis in order to further increase their powers.