| 2021 | HCI | Achieving Student Engagement in Learning: Utilizing a Rubric-Based Assessment System for Visualizing Learners' Self-, Peer, and Teacher Assessments. | Yasushige Ishikawa, Takatoyo Umemoto, Yasushi Tsubota, Shigeo Fujiwara, Ayako Suto, Koichi Nishiyama |
| 2020 | HCI | Building Student Interactions Outside the Classroom: Utilizing a Web-Based Application in a University Flipped Learning Course for EFL Learners. | Yasushige Ishikawa, Yasushi Tsubota, Takatoyo Umemoto, Masayuki Murakami, Mutsumi Kondo, Ayako Suto, Koichi Nishiyama |
| 2016 | SIGUCCS | Secure Data Management in an English Speaking Test Implemented in General-Purpose PC Classrooms. | Hideo Masuda, Masayuki Mori, Katsunori Kanzawa, Yasushi Tsubota, Yumi Hato, Yasuaki Kuroe |
| 2014 | HCI | Sustaining Outside-of-Class CALL Activities by Means of a Student Self-Evaluation System in a University Blended Learning EFL Course. | Yasushige Ishikawa, Reiko Akahane-Yamada, Misato Kitamura, Craig Smith, Yasushi Tsubota, Masatake Dantsuji |
| 2013 | PACLIC | Difficulties in Perception and Pronunciation of Mandarin Chinese Disyllabic Word Tone Acquisition: A Study of Some Japanese University Students. | Yuting Dong, Yasushi Tsubota, Masatake Dantsuji |
| 2007 | Interspeech | Evaluating and optimizing Japanese tutor system featuring dynamic question generation and interactive guidance. | Christopher J. Waple, Hongcui Wang, Tatsuya Kawahara, Yasushi Tsubota, Masatake Dantsuji |
| 2006 | Interspeech | Prototyping a call system for students of Japanese using dynamic diagram generation and interactive hints. | Christopher J. Waple, Yasushi Tsubota, Masatake Dantsuji, Tatsuya Kawahara |
| 2004 | Interspeech | Practical use of English pronunciation system for Japanese students in the CALL classroom. | Tatsuya Kawahara, Masatake Dantsuji, Yasushi Tsubota |
| 2003 | Interspeech | Automatic transformation of environmental sounds into sound-imitation words based on Japanese syllable structure. | Kazushi Ishihara, Yasushi Tsubota, Hiroshi G. Okuno |
| 2002 | Interspeech | Modeling and automatic detection of English sentence stress for computer-assisted English prosody learning system. | Kazunori Imoto, Yasushi Tsubota, Antoine Raux, Tatsuya Kawahara, Masatake Dantsuji |
| 2002 | Interspeech | Recognition and verification of English by Japanese students for computer-assisted language learning system. | Yasushi Tsubota, Tatsuya Kawahara, Masatake Dantsuji |
| 2000 | Interspeech | Computer-assisted English vowel learning system for Japanese speakers using cross language formant structures. | Yasushi Tsubota, Masatake Dantsuji, Tatsuya Kawahara |