Graduated from Tokyo University in 1980. Studied at Defense Language Institute (USA), Russian Research Center of Harvard University and Moscow State University (USSR). Received M. A. from Diplomatic Academy (Russia) and Waseda University (International relations). Worked in the Foreign Ministry for 40 years, including as Minister for public diplomacy in PRC, DCM in Russia, Ambassador to Croatia and chief negotiator of FTA. Visiting-lecturer of Higher School of Economics (Russia).
Published books and articles on public diplomacy, China-Russia border negotiations, Arctic cooperation, etc.