Prime Minister Naoto Kan's moves to weaken Japan's currency and shake up his administration have made him more popular as he seeks broader support for his economic agenda after surviving a leadership challenge. Kan's approval rating surged 18 percentage points to 64 percent in a recent survey and other polls are showing that he now holds his highest level of support since he took office in June. Kan "looks a lot more like a leader now," said Jeff Kingston, head of Asian Studies at Temple University, Japan Campus. "It's amazing how successful he's been at re-inventing himself."