By Clare Hutchison and Lidia Kelly
LONDON/MOSCOW (Reuters) - A Group of Seven statement designed to cool international currency tensions should be taken at face value and anonymous officials should not try to reinterpret it, the Bank of England's chief said on Wednesday.
Currency markets were thrown in to turmoil on Tuesday after a day of mixed messages about exchange rates, prompted by Japan's new government pressing for an aggressive expansion of monetary policy, which has seen the yen weaken sharply.
G7 nations - Britain, the United States, Japan, Germany, France, Italy and Canada - said fiscal and monetary policies must be directed at domestic economies and not at targeting exchange rates.
Japan quickly said the statement - released by Britain which chairs the G8 grouping (G7 plus Russia) this year - gave it a green light to continue efforts to reflate its economy.
But a G7 official responded by saying it was aimed squarely at Tokyo, a comment that prompt the yen to surge on a volatile foreign exchange market.
Bank of England Governor Mervyn King said the statement should be taken at face value.
"When countries take measures to use monetary stimulus to support growth in their economies, then there will be exchange rate consequences and they should be allowed to flow through," King told a news conference.
"In the short run if you want to allow countries to stimulate growth, you have to allow them to take the measures of a monetary or other kind which will have consequences on the exchange rate, and we should let floating exchange rates take them where they will.
"When I put my name to that statement yesterday, I didn't expect that other so-called officials will be out there giving unattributable briefings ... trying to claim that the statement said what it didn't say."
Russia, chair of the Group of 20 nations, said it was important that Japan had not intervened on currency markets to weaken the yen.
"The Japanese yen was definitely overvalued," Deputy Finance Minister Sergei Storchak told reporters, ahead of the G20 meeting in Moscow on Friday and Saturday.
Germany said the statement should draw a line under debate for now.
"I'm very glad that we have hopefully concluded the question of exchange rates for now ... which all G7 members accepted and I hope the G20 will also accept," a German government official told reporters.
A source familiar with the discussions that led to the release of the G7's first statement on exchange rates since 2011 said the off-record intervention may have been prompted by irritation that Japan had responded so quickly to say it had been given a clean bill of health.
ALL EYES ON G20
As a result, discussion at a G20 meeting of finance ministers and central bankers in Moscow at the end of the week may be more heated than previously expected with some concern about the pace at which the yen has fallen.
But officials said it was unlikely that Tokyo would face any sanction.
"To me the statement says - as long as price action is smooth (G7 officials) are not going to do anything. So I stand by my point that we are going to have more yen weakness in the medium-term," said Vasileios Gkionakis, head of global FX strategy at UniCredit in London.
Japan's top financial diplomat said his government will tell the G20 that its push to revive the economy with aggressive monetary expansion will benefit other nations and outweigh any possible negative effects.
"We share the view that each country should put their house in order by pursuing appropriate monetary, fiscal and structural policies and that would be the best contribution to the global economy," Takehiko Nakao, vice finance minister for international affairs, told Reuters in an interview.
U.S. and European officials have been concerned about comments from some Japanese officials that suggested Tokyo was targeting a specific level for the yen.
"You don't depreciate your way to growth whatever country you are," British Prime Minister David Cameron told parliament.
But U.S. Treasury official Lael Brainard said on Monday that while competitive devaluations should be avoided, Washington supported Tokyo's efforts to reinvigorate growth and end deflation.
The U.S. Federal Reserve, like the Bank of Japan, has created vast amounts of new money to bolster its economy.
(Additional reporting by Annika Breidthardt, Tomasz Janowski, Tetsushi Kajimoto, Katya Golubkova and Nia Williams. Writing by Mike Peacock. Editing by Jeremy Gaunt.)