† † † † † ATR 619-0288 2-2-2 E-mail: †{yone,yamazoe,utsumi,sabe}@atr.jp Gazecoppet Gazecoppet 1) “ ” 2) ( ) “ ” Hierarchical Gaze-communication with Ambient Gaze Tracking Tomoko YONEZAWA† , Hirotake YAMAZOE† , Akira UTSUMI† , and Shinji ABE† † ATR Intelligent Robotics & Communication Laboratories 2-2-2 Hikaridai, Keihannna Science City, Kyoto 619-0288, JAPAN E-mail: †{yone,yamazoe,utsumi,sabe}@atr