From Steven Englander (Citibank), “Currency war, BoJ Style” (4/7, not online):
Japan is likely to be labeled as a currency warrior by major Asian trading partners. However, the new BoJ policy has been endorsed by the Fed and IMF and is very G7 compliant, so the BoJ has cover for its policy agenda, despite the aggressiveness of its balance sheet expansion and negative implications for JPY.