The Japan Landslide Society
http://www.landslide-soc.org/index-e.html 

Japan Society of Erosion Control Engineering
http://www.jsece.or.jp/indexe.html

The Tohoku Geographical Association
http://www.soc.nii.ac.jp/tga/index-e.html

Tohoku Gakuin University Miyagi Laboratory
http://www.tscc.tohoku-gakuin.ac.jp/~miyagi-lab/ (In Japanese)

Iwate University, Faculty of Agriculture, Irasawa Laboratory
http://univdb.iwate-u.ac.jp/outside

Japan Association for Slope Disaster Management（JASDiM）
http://www.jisuberi-kyokai.or.jp/ (In Japanese)

The Japan Landslide Society Tohoku Branch
http://www.soc.nii.ac.jp/thb-jls/ (In Japanese)