After a two-day meeting on Friday, the BoJ left its benchmark interest rate unchanged at-0.1 per cent and its 10-year yield target around 0 per cent, in line with market expectations.
The BoJ cut its growth forecast for the current fiscal year to 3.8 per cent from 4.0 per cent in April.
Japanese President Toshihiko Kuroda is expected to hold a press conference at 3:30 local time.