Further weakening the yen, Japan's government pension fund announced it would increase its holdings of foreign and domestic shares.
"The dramatic new increase in quantitative easing was utterly unexpected by the market," Boris Schlossberg, managing director of foreign exchange strategy at BK Asset Management in New York, said in a note. "Taken altogether, this was a massive infusion of fresh liquidity into the Japanese capital markets and it highlights the BoJ determination to wipe out deflationary forces."
Today, Japanese banks will be closed in observance of Culture Day.
The New Zealand dollar slipped to 88.74 Australian cents from 88.83 cents on Friday. In Australia today, reports are scheduled for release on manufacturing, inflation, building approvals and commodity prices.
Traders will also be eyeing data in China today with the non-manufacturing Purchasing Managers Index and the HSBC final manufacturing PMI scheduled for release this afternoon. A report at the weekend showed China's PMI fell to a lower-than-expected 50.8 in October, from 51.1 the previous month and 51.2 expected by economists in a Bloomberg survey. A reading above 50 indicates growth.
China's economy expanded at a 7.3 percent annual pace in the third quarter, lagging the country's 7.5 percent target. China is New Zealand's largest trading partner and the world's second-largest economy.
The kiwi weakened to 62.06 euro cents from 62.21 cents on Friday. An initial report of Eurozone inflation showed consumer prices edged up 0.4 percent in October, from 0.3 percent in September, the 13th month Eurozone inflation of below 1 percent.
The local currency slipped to 48.58 British pence from 49.02 pence on Friday. The trade-weighted index weakened to 76.48 from 76.56 on Friday.