The yen keeps dropping/collapsing as the Bank of Japan keeps their interest rates extremely low (made possible by the government of Japan buying their banks bonds, now owner of over 50%, which is insane, but anyway) they need foreign demand for their currency. So they print yen for their corporations, who go on international buying sprees. The profits from these companies are generally settled in USD, but really any foreign currency will do.
The effect is that they are printing yen at no charge, their global corps pay virtually no interest, but even the most boneheaded executive can generate a foreign currency profit for head office that requires converting foreign currency into yen. Of course they destroy these companies through incompetence, so they keep buying more.
These companies are ridiculously complex with hundreds (possibly thousands) of commercial entities globally so they are probably impossible for anyone to understand, but my gut tells me this is a massive ponzi scheme that will explode the moment the Japanese central bank raises their interest rate.
Anyway, it is a lot of work sorting out what is going on, and I now think the poor financial & business governance is a feature that helps keep the masquerade going.