SENDAI, May 20: Divisions over reigniting global growth were set to surface at the G7 in Japan Friday, with US Treasury Secretary Jacob Lew expected to stand firm over any action threatening a currency war. Two days of talks will see host Japan keen to win an endorsement for its position that fiscal stimulus is the way to kickstart the world economy, after a rally in the yen hit exporters and worsened a slowdown at home.    ?AFP