- 2020/12 - 現在 The Japan Academy
- 2015/04 - 現在 The Graduate University for Advanced Studies
- 2015/04 - 現在 National Astronomical Observatory of Japan
- 2018/07 - 2020/03 National Institutes of Natural Sciences Designated Professor for TMTJ
- 2015/04 - 2018/06 Research Corporation University Hawaii Japan Representative of TMT
- 1993 - 2015/03 National Astronomical Observatory Professor
- 2002 - 2004 総合研究大学院大学*物科学研究科長(併任)
- 2002 - Dean, Graduate University for Aduanced Studies
- 1988 - 1993 Associate Professor, National Astron.Obs.
- 1993 - Professor, National Astronomical Observatory
- 1986 - 1988 Associate Professor, Univ. Tokyo
- 1988 - Assoc. Professor, Univ. of Tokyo,
- 1982 - 1986 Research Associate, Tokyo Astron. Obs.
- 1986 - Associate Professor, Univ. of Tokyo,
- 1983 - 1984 Visiting Researcher, European Southern Obs.
- 1983 - 1984 Research Associate,
- 1982 - 1983 Guest Researcher, Cambridge Univ.
- 1982 - 1983 Guest Researcher,
- 1978 - 1982 Tenure Research Associate, Univ.Tokyo
- 1982 - Research Associate, Univ. of Tokyo,
- 1978 - Research Associate, Univ. of Tokyo,
- European Southern Observatory
- Institute of Astronomy Cambridge Univ., UK
- Tokyo Astronomical Observatory
- Faculty of Science