As widely expected, the BOJ maintained its short-term interest rate target at -0.1% and a pledge to guide 10-year government bond yields around 0%, by a 7-2 vote.

It also maintained guidance that commits it to keeping rates at current low levels, or even cut them, until risks keeping it from achieving its 2% inflation goal subside.

In a quarterly review of its forecasts, the BOJ revised up its growth projection for the fiscal year beginning in April to 0.9% from an estimate of 0.7% growth made in October, helped by a boost from the government's fiscal stimulus package.

BOJ Governor Haruhiko Kuroda will hold a news conference at 3:30 p.m. (0630 GMT) to explain the decision.

(Reporting by Leika Kihara, Daniel Leussink, Tetsushi Kajimoto, Kaori Kaneko, Hiroko Hamada and David Dolan; Editing by Chris Gallagher)