Sanae Takaichi came out top in a male-dominated race to lead Japan's ruling party on Saturday, putting her on course to emulate her hero, former British leader Margaret Thatcher, and become her country's first female prime minister.The fiscal dove's surprise victory may jolt investor confidence in one of the world's most indebted economies, while her nationalistic positions could stoke friction with powerful neighbor China, political analysts say. She has also raised the possibility of redoing