As the U.S. keeps up pressure on Japan not to intervene over the yen, experts will be watching what Group of Seven finance chiefs have to say about Tokyo's readiness to sell the currency in the event that it continues rising.
Finance ministers and central bankers begin a two-day meeting in Sendai on Friday at which they will discuss the world economy, sustainable development and cross-border financial flows.
Experts warned of possible reaction by the yen to whatever the ministers have to say about the foreign exchange market.