The Bank of Japan on Thursday further boosted the balance of deposits at current accounts held at the BOJ by commercial financial institutions to a record 14.9 trillion yen.
The balance is bigger than the previous high set in late November, when the central bank injected liquidity into the money market to contain possible turmoil in the wake of the financial woes of U.S. energy giant Enron Corp.
In March, the BOJ shifted its money-market policy tool to the current-account balance from the key unsecured call money rate under its so-called quantitative relaxation of monetary policy.
The balance is also at the upper end of the BOJ's target range of 10 trillion yen to 15 trillion yen.
On Dec. 19, the BOJ decided to raise the target from the previous "more than 6 trillion yen."