Apr. 1983
Worked as public prosecutor of Tokyo, Naha and Niigata District Public Prosecutors Offices, of Criminal Affairs Bureau of the Ministry of Justice, and as First Secretary of Embassy of Japan in the United States of America

Sep. 1999
Appointed as Chief of Investigations, Human Rights Bureau of the Ministry of Justice

Jan. 2003
Appointed as Chief of Public Security Division, Criminal Affairs Bureau of the Ministry of Justice

Jun. 2004
Appointed as Chief of Criminal Affairs Division, Criminal Affairs Bureau of the Ministry of Justice

Dec. 2005
Appointed Deputy Head of special investigation task force of the Tokyo District Public Prosecutors Office

Jan. 2007
Appointed Head of General Affairs Department of the Tokyo District Public Prosecutors Office

Jul. 2008
Appointed Head of special investigation task force of the Tokyo District Public Prosecutors Office

Jul. 2010
Appointed Chief Public Prosecutor of Otsu, Maebashi and Chiba District Public Prosecutors Offices, Director of United Nations Asia and Far East Institute, and Director-General of the Research and Training Institute of the Minister of Justice

Jan. 2019
Retired from the position

Mar. 2019
Appointed Outside Director of bitFlyer, Inc.

Jun. 2019
Appointed Outside Director of the Company (current position)

Nov. 2019
Registered as an attorney-at-law（Dai-ichi Tokyo Bar Association）

Mar. 2022
Appointed Outside Director of PowerX, Inc. (current position)

Jun. 2023
Appointed Outside Director of Riken Corporation

Oct. 2023
Appointed Outside Director of NPR-RIKEN CORPORATION
(current position)