The Bank of Japan said Tuesday that it will purchase 200 billion yen outright in short-term government bills to provide liquidity to the Tokyo money market, effectively doubling the scale of the open-market operation.

It is the second time since Feb. 13 for the BOJ to conduct an outright purchase aimed at bringing down short-term interest rates.

A BOJ official said that since the central bank received offers totaling roughly 550 billion yen during its Feb. 13 operation, it decided to increase the scale of the operation from the previous 100 billion yen.