Faculty of Culture and Information Science, Doshisha University, Kyoto 610-0394, Japan. dfukagaw@mail.doshisha.ac.jp|Faculty of Culture and Information Science, Doshisha University, Kyoto 610-0394, Japan. dfukagaw@mail.doshisha.ac.jp|Faculty of Culture and Information Science, Doshisha University, Kyoto 610-0394, Japan. dfukagaw@mail.doshisha.ac.jp|Faculty of Culture and Information Science, Doshisha University, Kyoto 610-0394, Japan. dfukagaw@mail.doshisha.ac.jp|Faculty of Culture and Information Science, Doshisha University, Kyoto 610-0394, Japan. dfukagaw@mail.doshisha.ac.jp