<特別寄稿>今日までの研究歴を振り返って --15年間の準備，3年間の栄光，20年間の挫折，そして最近の3年間で見えた新しい地平--

Abstract

This manuscript describes my history of research on quantitative prediction of the site amplification and strong ground motions, as well as subsequent structural damage, from the beginning of my carrier to the most recent achievements. The history can be divided into four eras, namely, the first 15 years for preparation, the second three years of significant progress after the 1995 Hyogo-ken Nanbu earthquake, the third 20 years of painful experience of no reward for dissemination in seismic design in Japan, and the last three years of finding a new horizon for the quantum leap in near future. In conclusion, the most important points for the success of research are to keep motivated, keep positive, and keep trusting yourself.