Fresh Prince, hope your doing well.
Sorry about my taste in idioms. I'm not an expert, you can do some googling on how economys collapse, but to answer, I'd say not really. Also, Japanese culture is different than the US.
In short, what will happen is the banks close, bonds collapse, much wealth is lost, followed by hyperinflation, rendering the currency useless. This has happend in many smaller countries in the last 20 years, and it didn't result in famine, but it is bad.(Argintina) Remember though, the statis quo will be maintained at all costs. People have been betting on Japan collapsing for over 20 years, yet it goes on.
Knowing these things don't bother me, journeys come to an end, and new journeys begin. "Disturbance and rest", it is natural. I wish you well in your soul searching. It's wise to be prepared, but don't get hung up on doom, think positive and hang tough.
I live in the Southeast US, pm me if you like.
HBH