The Bank of Japan said Tuesday it will expand the range of eligible collateral that lenders can put up for BOJ loans in an effort to help financial institutions obtain ample liquidity.

Wrapping up its two-day Policy Board meeting, the BOJ also said the key interest rate would remain at 0.1 percent.

"Financial conditions have remained tight on the whole, despite improvements in issuing conditions for commercial paper and corporate bonds," the central bank said in a statement.