1. Japan Health Promotion & Fitness Foundation (2000), http://www.kenkounippon21.gr.jp/index.html
2. Increase of the importance of lifestyle-related disease measures. Annual Report on Health and Welfare (2007), http://wwwhakusyo.mhlw.go.jp/wpdocs/hpax200701/b0039.html
3. Bob and Angie recipe site, http://www.bob-an.com/recipe/daily/daily.asp
4. Health and Nutrition Information Infrastructure Database, http://dbs.jst.go.jp/HandNDB.htm
5. Minami, F., Kobayashi, M., Ito, T.: An Implementation of Goal-Oriented Book Recommendation System with Concept Dictionary. In: 24th Japan Society for Software Science and Technology (2007)