Beyond just his name, Japan’s central bank and monitory policy In the 1980s was ‘very easy’, they printed WAY too much money.. 
The grounds of the imperial palace were worth more than the entire real estate value of California and their Nikkei stock market one of the most valuable in the world.
The following decade ‘lost decade’ and really 30 years after that, everything crashed and remained stagnant.
A great book that explains this better is called ‘ Princes of the Yen’. There is also a YouTube documentary on it.

https://youtu.be/p5Ac7ap_MAY?si=P0Y_AyOPqYf-aZ3F