I don’t normally link to news articles until the Tokyo lunch and after when it normally is quiet (they are usually old news by the time they’re articles) – but here’s one worth reading for background:
Members of the BOJ’s elite monetary affairs department have been drawing up plans for a bolder set of policy options since late last year, people with knowledge of those discussions say.
Special Report: After a bashing, BOJ weighs “big bang” war on deflation