The Bank of Japan offered its most optimistic view of the country's regional economies in more than a decade on solid exports and private consumption. 

But Bank of Japan Governor Haruhiko Kuroda reiterated his resolve to maintain ultra-loose monetary policy until inflation is stably above its 2% target.

This is a sign the Japanese central bank will not join its US and European counterparts in dialling back stimulus any time soon. 

"Japan's economy is expected to continue expanding moderately ahead," Kuroda told a quarterly meeting of the central bank's regional branch managers today. 

In a quarterly report on regional areas of Japan, the Bank of Japan revised up its assessment for five of nine regions and maintained its upbeat view for the remaining four areas. 

The report described six regional economies as "expanding moderately" or "moving toward a moderate expansion." 

It was the first time the Bank of Japan used such strong language for so many regions since it began compiling the report in April 2005. 

"Exports are increasing as a trend as overseas economies grow moderately. The job market continues to tighten steadily and is helping consumption gather momentum," the bank said. 

The upbeat assessment came despite data released earlier today that showed core machinery orders unexpectedly tumbled in May, raising doubts about the economy's strength. 

The report will be among factors the Bank of Japan will scrutinise at next week's rate review, when it will release fresh quarterly growth and inflation projections. 

In the past two weeks, the European Central Bank, the Bank of England and the Bank of Canada have all switched gears to a more hawkish policy stance, suggesting the era of cheap money is nearing an end. 

The US Federal Reserve has already raised interest rates twice this year and is seen tightening again before the of the year. 

But for Japan, an exit from stimulus is far off the radar. 

All the same, with the economy gaining momentum, Kuroda has a communication challenge on his hands as he tries to convince markets the Bank of Japan has a credible plan to exit ultra-loose policy - without spooking investors that such a move is imminent.

The Bank of Japan will cut its inflation forecasts but hold off expanding stimulus at the July 19-20 meeting, people familiar with the matter say, in another sign the bank is retreating from Kuroda's initial pledge to do whatever it takes to achieve his ambitious inflation target. 

After three years of heavy asset buying failed to drive up inflation, the bank revamped its policy framework last year to one capping long-term interest rates from that targeting the pace of money printing.