Quote from benwm:
Amazingly, despite what some describe as a twenty year 'deflationary spiral' the yen is stronger now than where it was at the 1989-90 bubble peak.
FX reflects, over long periods of time, relative inflation levels between the currencies being traded. It is, therefore, axiomatic that after a long period of deflation, the yen would be higher than it was at the start.
It also shows that regardless of how hard the BOJ tried, they never did succeed in easing credit in Japan, else there would have been inflation, and debtors would indeed have been somewhat relieved of their debt by it, rather than committing suicide in the tens of thousands every year.