BOJ "keep rates near zero" policy battered the JPY! So much so, that despite the massive weakening of the EUR vs the USD, EUR/JPY has still climbed to 'nose-bleed' highs! Some argue that the BOJ will entertain higher inflation for an extended period of time in order to make sure that economic growth, dormant for decades, finally launches. But others argue that despite the few industries (like autos) that benefit from weak-Yen induced demand for Japanese exports, most of the country is very heavily import-dependent and stands to be hurt by this low-rates/weak-JPY policy. I'm in the latter camp and continue to build a short in EUR/JPY.
My friends tell me that just like "don't fight the Fed" is the rule on this side of the Pacific, "don't fight the BOJ" is the rule on the other side.
I think we're at levels, though, where I'm willing to take on the fight. (Famous last words???)