Japan and Korean Stock markets incredibly/dangerous growth

https://www.cnbc.com/quotes/.KS11 from 2900 to 9000 in one Year (3x profit) https://www.cnbc.com/quotes/.N225 from 38000 to 71000 in one year (2x profit)

Isn´t this suppose to grow in relation/ratio to National GDP? Are they growing so much for really or they are trying to keep up with money printing? There is no correlation markets/inflation the last year so what the heck is happening, are they doomed or they know smth we don´t?

Imagine that for the pension funds, they just got a boost of 200-300% of their entire lifetime savings, where is this money coming from, who is paying the bill? Who is throwing trillions to that market?