- 1982 - 1986 Tokyo University of Agriculture and Technology Faculty of Engineering
- 1982 - 1986 Saitama University
- 1982 - 1986 Tokyo University of Agriculture & Technology, Part-Time Instructor
- 1982 - 1986 Saitama University, Faculty of Liberal Arts, Part-Time Instructor
- 1979 - 1986 Hosei University Faculty of Economics
- 1979 - 1986 Housei University, Faculty of Economics, Part-Time Instructor
- 1977 - 1986 東京大学東京天文台 研究員
- 1977 - 1986 Tokyo Astronomical Observatory, Research Worker
- 1971 - 1972 建設省国土地理院 研究員
- 1971 - 1972 Geographical Survey Institute, Research Worker
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