1. (1) Database of Ministry of Health, Labour and Welfare in Japana, http://www.mhlw.go.jp/english/index.html
2. (2) United Nations Economic Commisiion for Europe, 国連欧州経済委員会,http://www.unece.org/
3. (3) International Federation of Robotics, 国際ロボット連盟,http://www.ifr.org/
4. (4) T. Matsunaga : “View of advanced interface technology which supports advanced activity of elderly in Japan”, SICE Annual Conference of System Integration (2004) (in Japanese)
5. 松永:「高齢者の高度活動を支援する高度インタフェース技術の展望」,SICE SI部門講演会,(2004)