I respectfully disagree, while they could not stop the 50% drop they did prevent it from turning into a depression and they did know what they were doing and what would happen IMO.
I say no big crash until everyone is feeling really over confident and inflation brings local municipalities back above water (not going BK left and right) we are not there yet (IMHO anyway).
Also until this year Japan was cratering more to their older population that was transitioning to fixed income and would not tolerate ANY inflation.
That seems to have changed in a big way.
The move to $10.00 minimum wage is just the start, I think we will be at $15 dollars before 2020.