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Public Works Research Institute
http://www.pwri.go.jp/
Civil Engineering Research Institute of Hokkaido
http://www.ceri.go.jp/
East Nippon Expressway Company Limited
http://www.e-nexco.co.jp/
Central Nippon Expressway Company Limited
http://www.c-nexco.co.jp/
West Nippon Expressway Company Limited
http://www.w-nexco.co.jp/
Metropolitan expressway Company Limited
http://www.shutoko.jp/
Hanshin Expressway Company Limited
http://www.hanshin-exp.co.jp/drivers/
Honshu-Shikoku Bridge Expressway Company Limited
http://www.jb-honshi.co.jp/
Nichidai Pave Net
http://www.pavenet.jp
The University of Tokyo
http://www.u-tokyo.ac.jp/index_j.html
Kyoto University
http://www.kyoto-u.ac.jp/
Tokyo Metropolitan University
http://www.metro-u.ac.jp/
Tokyo Institute of Technology
http://www.titech.ac.jp/
Shibaura Institute of Technology
http://www.shibaura-it.ac.jp/