Professional and Academic Associations
・Professional employment: Ministry of Finance (April 1966 - June 1969, 1973-1977, 1980-1981, July 1986 - May 1988; September 1990 - June 1992); Ministry of International Trade and Industry (currently the Ministry of Economy, Trade and Industry) (July 1969 - June 1971); Tomakomai Tax Office (Director, July 1971 - June 1972); Musashi-Fuchu Tax Office (Director, July 1972 - 1973); Consulate-General of Japan in Los Angeles (May 1977 - 1980); National Tax Agency (June 1988 - June 1989); Cabinet Legislative Bureau (July 1981 - June 1986, December 1992 - July 2004, Director-General, August 2004 - September 2006).
・Dai-ichi Tokyo Bar Association
・Special Visiting Professor, Meiji University, Graduate School of Governance Studies (April 2007 -)