This of course fundamentally does nothing of consequence for aggregate demand or the level of the currency. The extra deficit spending due to start in April is what will help a bit.
BOJ Adopts Abes 2% Target in Commitment to Ending Deflation
By Toru Fujioka and Masahiro Hidaka
January 22 (Bloomberg) — The Bank of Japan set a 2 percent inflation target and shifted to Federal Reserve-style open-ended asset purchases in its strongest commitment yet to ending two decades of deflation.