Japan's central bank has surprised the market by announcing the introduction of a negative interest rate. Starting on the 16th of this month, the country will apply a minus 0.1% rate to current accounts held by financial institutions. It is the first time that the world's third largest economy has adopted a negative interest rate.So, what's going on in the Japanese economy? What are the implications for other major economies, including China? And how are experts analyzing the central bank's decision? PIK speaks with Yang Xiyu, Senior Research Fellow from the China Institute of International Studies, Paul Gillis, Professor of Accounting at Guanghua School of Management and Winston Wong, Managing Director of Shipstone Group Limited.