Prior to joining Promontory, Yoshio served as a personal adviser to former Japanese Prime Minister Yasuo Fukuda, and he continues to serve as a Special Analyst to the Prime Minister's Office. Yoshio previously was a Senior Deputy Director in the Japanese Ministry of Finance and held several senior policy and supervisory roles in Japan's Financial Services Agency, the regulatory body that oversees banking, securities and exchange, and insurance. Before joining the FSA at its inception in 2000, he served as adviser to the Executive Director of the World Bank in Washington, D.C., where he played an important role in formulating the institution's response to the Asian financial crisis in the late 1990s.