An algorithm for choosing Japanese acknowledgments using prosodic cues and context. - Wataru Tsukahara (ICSLP, 1998)

Evaluating responsiveness in spoken dialog systems. - Wataru Tsukahara; Nigel Ward (INTERSPEECH, 2000)

Responding to subtle, fleeting changes in the user's internal state. - Wataru Tsukahara; Nigel Ward (CHI, 2001)

A study in responsiveness in spoken dialog. - Nigel Ward; Wataru Tsukahara (Int. J. Hum. Comput. Stud., 2003)

A Development of Learning Management System for the Practice of E-Learning in Higher Education. - Wataru Tsukahara; Ken Nakayama; Fumihiko Anma; Toshio Okamoto (CELDA, 2005)

System Development and Practice of e-Learning in Graduate School. - Kazuya Seki; Wataru Tsukahara; Toshio Okamoto (ICALT, 2005)

Individual Learning Pattern Related to Intention - with a Biological Model of Knowledge Construction. - Toshie Ninomiya; Wataru Tsukahara; Toshiaki Honda; Toshio Okamoto (ITEM, 2006)

Long-term Memory of Foreign-word Learning by Short Movies for iPods. - Satoko Amemiya; Kazunori Hasegawa; Keiichi Kaneko; Haruko Miyakoda; Wataru Tsukahara (ICALT, 2007)

Reach: an Awareness Rich CSCL Text Chat Tool with Real-time Key Typing Display. - Wataru Tsukahara; Zhang Zisheng; Shingo Akamatsu; Fumihiko Anma; Toshio Okamoto (ICALT, 2007)

Designing a Peer Reviewing Tool on Lecture Video with Handwritten Annotation. - Hironori Egi; Shotaro Houri; Yukari Kato; Tatsuya Terada; Wataru Tsukahara; Masaki Nakagawa (HCI (8), 2009)

FD Commons: E-Teaching Portfolio to Enable an Ubiquitous Peer Reviewing Process. - Yukari Kato; Shotaro Houri; Wataru Tsukahara; Hironori Egi; Masaki Nakagawa (ICALT, 2009)