Recent open market operations by the Bank of Japan have prompted analysts to speculate the central bank is set to lift its ultraloose monetary policy on April 11.

The BOJ set the maturity date of bill-buying operations offered at its head office Monday at April 5. It also offered bill-purchasing operations Wednesday at all of its offices with the maturity date set at April 4.

This suggests the BOJ could be planning to scrap the five-year-old cash-flooding stance on April 11 when nine BOJ policymakers wrap up a two-day meeting, according to Masuhisa Kobayashi, chief Japanese government bond strategist at Barclays Capital Japan Ltd.