- 2006 - 2009 :アジア太平洋学部長、アジア太平洋研究科長
- 2006 - 2009 :Dean of College of Asia Pacific Studies, Dean of Graduate School of Asia Pacific Studies
- 2009 - -:副学長
- 2009 - -:Vice President
- 2005 - 2006 :教学部長
- 2005 - 2006 :Dean, Academic Affairs
- 2003 - 2005 :学生部長
- 2003 - 2005 :Dean, Student Affairs
- 2000 - 2002 :法務省高松入国管理局長
- 2000 - 2002 :Director, Takamatsu Regional Immigration Bureau
- 2002 - -:立命館アジア太平洋大学、教授
- 2002 - -:Ritsumeikan Asia Pacific Universuty
- 1997 - 2000 :法務省入国管理局登録課長
- 1997 - 2000 :irector, Alien Registration Division, Immigration Bureau, Ministry of Justice
- 1996 - 1997 :法務省東京入国管理局次長
- 1996 - 1997 :Deputy Director, Tokyo Regional Immigration Bureau
- 1993 - 1996 :法務省入国管理局入国在留課審査指導官
- 1993 - 1996 :Senior Assitant for Immigration Examination, Entry and Status Division, Immigration Bureau, Ministry of Justice
- 1990 - 1993 :外務省アジア局入国地域政策課主任企画官(APEC担当)
- 1990 - 1993 :Senior Assistant for Asia Pacific Cooperation, Regional Policy Division, Asian Bureau, Ministry of Foreign Affairs
- 1989 - 1990 :法務省入国管理局入国審査課課長補佐(補佐官)
- 1989 - 1990 :Deputy Director, Entry Division, Immigration Bureau, Ministry of Justice
- 1986 - 1989 :法務省入国管理局総務課課長補佐(補佐官)
- 1986 - 1989 :Deputy Director, General Affairs Division, Immigration Bureau, Ministry of Justice
- 1983 - 1986 :法務省入国管理局資格審査課課長補佐(補佐官)
- 1983 - 1986 :Deputy Director, Status Division, Immigration Bureau, Ministry of Justice
- 1981 - 1983 :国連難民高等弁務官事務所(UNHCR)に出向、同国際保護部法規課 リーガルオフィサー
- 1981 - 1983 :Legal Officer, General Legal Section, International Protection Division, UNHCR
- 1979 - 1981 :法務省入国管理局総務課法規係長
- 1979 - 1981 :Chief of Legal Section, General Affairs Division, Immigration Bureau, Ministry of Justice
- 1977 - 1979 :法務局入国管理局入国審査課入国審査第1係長
- 1977 - 1979 :Chief of the First Entry Section, Entry Division, Immigration Bureau, Ministry of Justice
- 1976 - 1977 :法務省東京入国管理事務所入国審査官
- 1976 - 1977 :Immigration Inspector, Tokyo Immigration Office, Ministry of Justice
- 1973 - 1974 :法務省東京入国管理事務所入国審査官
- 1973 - 1974 :Immigration Inspector, Tokyo Immigration Office, Ministry of Justice
- 1972 - 1973 :法務省入国管理局法務事務官
- 1972 - 1973 :Officer of the Ministry of Justice, Immigartion Bureau, Ministry of Justice