"It is unlikely we will see any further increase in the asset purchase program this year, as policymakers are in wait-and-see mode to determine the effects of past policy changes," David Rea, Japan economist at Capital Economics, wrote.
The Nikkei 225 Stock Average stepped 0.12 per cent down, or 10.56 points, to 9,142.64. The broader Topix Index lost 0.02 per cent, or 0.12 points, to 762.04.