H Nagano1, M Omori1,2, Z Shoji1,3, T Kawaguchi1,4, M Arai1,4. 1. a Faculty of Education , Gifu University, Yanagido , Gifu 501-11 , Japan. 2. b Department of Food Science , Otsuka Women's University, Chiyoda-ku , Tokyo 102 , Japan. 3. c Faculty of Education , Akita University, Tegatagakuen , Akita 010 , Japan. 4. d College of Agriculture, University of Osaka Prefecture, Sakai , Osaka 581 , Japan.