- 1998 - 2011 :茨城大学工学部都市システム工学科教授
- 1998 - 2011 :Professor, Department of Urban and Civil Engineering, Ibaraki University
- 2011 - -:茨城大学 名誉教授
- 2011 - -:Ibaraki University, Professor Emeritus
- 1996 - 1998 :建設省土木研究所地震防災部長(改組のため、
- 1996 - 1998 :Director, Earthquake Disaster Prevention Department, PWRI, Ministry of Construction
- 1996/05 - より耐震技術研究センター長)
- 1994 - 1996 :建設省土木研究所構造橋梁部長
- 1994 - 1996 :Director, Structure and Bridge Department, PWRI, Ministry of Construction
- 1992 - 1994 :(財)先端建設技術センタ-研究第1部長
- 1992 - 1994 :Director, First Research Department, Advanced Construction Technology Center
- 1984 - 1992 :建設省土木研究所構造橋梁部構造研究室長
- 1984 - 1992 :Head, Structure Division, Structure and Bridge Department, PWRI, Ministry of Construction
- 1971 - 1979 :建設省土木研究所構造橋梁部構造研究室
- 1971 - 1979 :Researcher, Structure Division, Structure and Bridge Department, PWRI, Ministry of Construction
- Ibaraki University Frontier Research Center for Applied Atomic Sciences
- 研究員
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土木学会
, American Society of Civil Engineers
, 日本風工学会
, 日本地震工学会
, 日本鋼構造協会
, Japan Society of Civil Engineers
, American Society of Civil Engineers
, Japan Association for Wind Engineering