The central bank, under its new governor Haruhiko Kuroda, has vowed to double the monetary base through purchases of government bonds to meet a 2 percent inflation target within the next two years.
He's won more than double the number of delegates than Romney, the former Massachusetts governor, and more than three times those earned by former Arkansas Gov. Huckabee.
Its governor Sir Mervyn King said he expected the economy to avoid a double-dip recession and that some businesses had indicated things had picked up at the start of the year.