Japan's monetary base rose 52.5 percent in November from a year earlier to a record 189.72 trillion yen (about 1.84 trillion US dollars) due to the central bank's ultra loose monetary policy aimed at beating Japan's prolonged deflation, according to local media Tuesday.

It is the ninth straight month of increase of the monetary base, Japan's Kyodo News quoted the central bank, the Bank of Japan ( BOJ), as saying, adding the average daily balance of liquidity provided by the BOJ rose for the 19th consecutive month.

The central bank said that the country's monetary base stood at 191.62 trillion yen (about 1.86 trillion dollars) at the end of November, the highest level ever.

The BOJ said it has set monetary base as the main target for its monetary policy and it will double the monetary base within two years in a move to combat the country's deflation.

BOJ chief Haruhiko Kuroda suggested Monday that the central bank may not end its ultra loose monetary policy before fiscal year 2015, vowing the BOJ will continue with its the policy "as long as it is necessary for maintaining the target in a stable manner," and might adopt further measures if the situation does not improve as expected.