Professor,Graduate School of Information Sciences Tohoku University ,Professor
- 2002 - 2004 Japan Broadcasting Corporation
- 2002 - 2004 Executive Research Engineer, Science & Technical Research Labs.,Japan Broadcasting Corp.
- 2004 - - 東北大学電気通信研究所 教授
- 2004 - - Professor, Research Institute of Electrical Communication,Tohoku University
- 1999 - 2002 Japan Broadcasting Corporation
- 1999 - 2002 Director, Engineering Administration Department, Japan Broadcasting Corp.
- 1996 - 1999 Japan Broadcasting Corporation
- 1996 - 1999 Director, Science & Technical Ressearch Labs., Japan Broadcasting Corp.
- 1987 - 1996 Japan Broadcasting Corporation
- 1987 - 1996 Senior Research Engineer, Science & Technical Research Labs., Japan Broadcasting Corporation
- 1975 - 1987 Japan Broadcasting Corporation
- 1975 - 1987 Research Engineer, Technical Research Labs., Japan Broadcasting Corp.
- 1971 - 1975 Japan Broadcasting Corporation
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映像情報メディア学会・マルチメディアストレージ研究会
, 日本学術振興会磁気記録第144委員会
, 映像情報メディア学会
, 日本応用磁気学会
, 電子情報通信学会
, The Institute of Image Information and Television Engineers
, The Magnetic Society of Japan
, Committee 144 (Magnetic Recording) of The Japan Society for The Promotion of Science
, Institutre of Image Information and Television Engineers
, Magnetic Society of Japan
, Information and Communication Engineers
, Institute of Electronics