This author has not been identified. Look up 'Akihisa Ohya' in GoogleThis author has not been identified. Look up 'Koichi Ozaki' in GoogleThis author has not been identified. Look up 'Tomohito Takubo' in GoogleThis author has not been identified. Look up 'Shin'ichi Yuta' in GoogleThis author has not been identified. Look up 'Yoshihiro Takita' in Google