Prosperity and Decline of Online Communities. - Kimitaka Asatani; Fujio Toriumi; Hirotada Ohashi; Mitsuteru Tashiro; Ryuichi Suzuki (PRIMA, 2013)

Analysis of User Behavior on Private Chat System. - Fujio Toriumi; Takafumi Nakanishi; Mitsuteru Tashiro; Kiyotaka Eguchi (WI-IAT (3), 2015)