*G20 may agree need to take all measures to boost growth
*Foreign exchange unlikely to be major topic at meeting
By Leika Kihara
TOKYO, March 10 (Reuters) - Group of 20 finance leaders are expected to agree on the need for each nation to take all available steps to support the global economy at a weekend meeting, a senior Japanese finance ministry official said on Tuesday.
Asked if foreign exchange would be a topic at the meeting, the official told reporters: "Some nations may talk about the currency market but I don't see that becoming a big topic at the meeting."
Finance leaders from the G20 group of rich nations and major emerging powers will meet at the weekend in London to lay the groundwork for a summit of G20 leaders in early April.
In response to the global downturn, which grew out of a U.S. housing market slump and spread through the rich world to emerging economies, central banks and governments have slashed interest rates and unveiled stimulus packages.
Japan pledged on Tuesday to do whatever it takes to drag its ailing economy out of recession as a rift emerged between the United States and Europe over whether governments have done enough to fight the financial crisis.
"We'd like to act based on an agreement of countries across the globe that each nation will take whatever steps are necessary to achieve an economic recovery," Finance Minister Kaoru Yosano told reporters on Tuesday.
Yosano's comments appeared to put Japan in step with the United States, which seemed to suggest other major nations should step up their efforts to battle the crisis.
Top U.S. officials urged other countries on Monday to step up spending to combat recession but Europe dismissed the call, exposing a rift before a summit of the world's largest rich and developing economies. (Editing by Michael Watson)