Japan's Nikkei Stock Average made the biggest one-day advance in 5 months on Tuesday lifted by weaker Yen and Fed's Chairman announcement. Nikkei 225 index rallied 2.36% or 236.91 points and closed at 10,255.15. Sumitomo Metal Mining jumped 5.9% on news its gold mine in Alaska has discovered a gold deposit. Japanese leading exporters added to gains with Toyota Motors soaring 3.6% and Sony Corp advancing 3.1%. Honda Motor surged 3.5% on Nikkei report the auto manufacturer may build a new plant in Thailand.