NHK NEWS
Huge economic loss from mega-quakes
https://www3.nhk.or.jp/nhkworld/en/news/20180607_19/
http://wwwc.cao.go.jp/lib_012/syuto_all_en.html
Why Seismic Design Coefficients (i.e., factors) are important to engineering innovation
https://www.sbcmag.info/article/2014/seismic-design-coefficients-how-they-are-determined-light-frame-components