June, 2008
　　A local report of the Yamaguchi reinforced concrete industry is added to
　　the 25th page.

　　September 15, 2006
　　The patent was authorized more formally than Patent Office in Japan.

　　June 1, 2006
　　12 file Shinwa industry is added to the site report.

　　English version homepage opening to the public. March 6, 2006