The Bank of Japan said Friday that it will make two-, four-, five- and six-year government notes subject to its regular market operations staring next month.

The central bank so far has used only short-term securities, and 10- and 20-year government bonds among state debt instruments for its regular market operations to pump liquidity into the banking system.

The BOJ also said it will increase the number of financial institutions subject to its bill-buying operations to 40 from the current 30 and extend the maximum maturity of bills subject to such operations to six months from the current three.