Japan's yen may have fallen into uncharted territory nL1N2XW0GU

After a dramatic plunge between 1970 and 2011 USD/JPY remains very weak

The target for a minor correction of that decline is 183.61

Target for a minor correction of losses since Plaza Accord is 147.08

This is problem if BOJ hope to involve U.S. in any plan to curb yen's drop

A plan to curb yen is problem for BOJ it pursues super-easy policy

If U.S. Treasury approved intervention, Fed would have a problem

U.S. intervention with Fed just starting tighten seems unlikely

Even more unlikely given dollar is so weak vs JPY