1. Cabinet Office Website, FY2016 White Paper on Ministry of Health, Labor and Welfare Consider a Social Model That Overcomes Population Aginghttps://www.mhlw.go.jp/wp/hakusyo/kousei/16/
2. Trends in measures for the development and popularization of welfare equipment and nursing robots;Goto;J. Clin. Rehabil.,2016
3. Keys to problems and solutions seen from the development site;Nakanishi;Sogo Rehabil.,2014
4. Toyota Motor Corporationhttp://www.toyota.co.jp/robotics/welwalk/
5. CYBERDYNEhttps://www.cyberdyne.jp/products/HAL/index.html