| Public Prosecutor, Tokyo District Public Prosecutors' Office (1970-1971; 1973-1975; 1978; 1980; 1986-1992) |
| Public Prosecutor, Matsuyama District Public Prosecutors' Office (1971-1973) |
| Public Prosecutor, Utsunomiya District Public Prosecutors' Office (1975-1978) |
| Foreign Nationals' Affairs Division, Counselor Affairs Bureau, Ministry of Foreign Affairs (1978-1980) |
| Head of the Public Security Department of Sapporo District Public Prosecutors' Office (1983-1986) |
| Professor, Legal Training and Research Institute of the Supreme Court of Japan (1992-1995) |
| Deputy-General of the Immigration Bureau, Minister's Secretariat, Ministry of Justice (1995-1997) |
| Public Prosecutor, the Supreme Public Prosecutors' Office (1997) |
| Chief Public Prosecutor, Oita District Public Prosecutors' Office (1997-1999) |
| Deputy Director-General of the Minister's Secretariat, Ministry of Justice (1999) |
| Cabinet Councilor; Director-General of Council on Reform of the Judicial System (1999-2001) |
| Director of the Preparatory Office of the Task Force on Judicial Reform (2001) |
| Director of the General Affairs Bureau of the Supreme Public Prosecutors' Office (2001-2002) |
| Detective Superintendent, Ministry of Justice (2002-2004) |
| Administrative Vice-Minister of the Ministry of Justice (2004-2006) |
| Superintending Prosecutor, Hiroshima High Public Prosecutors' Office (2006) |
| Superintending Prosecutor, Tokyo High Public Prosecutors' Office (2006-2008) |
| Prosecutor General (2008-2010) |
| TMI Associates (Advisor Attorney, 2010-Present) |
