“Bank of Japan Gov. Haruhiko Kuroda’s plan — branded ‘quantitative and qualitative monetary easing,’ or QQE, is radical not just for the quantity, but also for the ‘quality’ of the assets it’s soaking up in a bold campaign to end deflation. The BOJ, like the world’s other major central banks, buys assets from private holders as the primary mechanism for injecting money into the economy, because the traditional lever — cutting interest rates — has been neutered by the fact that rates are at or near zero in most advanced economies. But some — including Mr. Kuroda’s cautious predecessor, Masaaki Shirakawa, who avoided the purchase of longer-term debt — feel that’s a dangerous path.”
http://blogs.wsj.com/economics/2014/10/31/bank-of-japan-sails-further-into-uncharted-territory/