| 2000 | Interspeech | Evaluation of the ATR-matrix speech translation system with a pair comparison method between the system and humans. | Fumiaki Sugaya, Toshiyuki Takezawa, Akio Yokoo, Yoshinori Sagisaka, Seiichi Yamamoto |
| 1999 | ACL | An Efficient Statistical Speech Act Type Tagging System for Speech Translation Systems. | Hideki Tanaka, Akio Yokoo |
| 1999 | Interspeech | End-to-end evaluation in ATR-MATRIX: speech translation system between English and Japanese. | Fumiaki Sugaya, Toshiyuki Takezawa, Akio Yokoo, Seiichi Yamamoto |
| 1998 | INLG | Planning Dialogue Contributions With New Information. | Kristiina Jokinen, Hideki Tanaka, Akio Yokoo |
| 1998 | Interspeech | A Japanese-to-English speech translation system: ATR-MATRIX. | Toshiyuki Takezawa, Tsuyoshi Morimoto, Yoshinori Sagisaka, Nick Campbell, Hitoshi Iida, Fumiaki Sugaya, Akio Yokoo, Seiichi Yamamoto |
| 1994 | COLING | Two Methods for Learning ALT-J/E Translation Rules from Examples and a Semantic Hierarchy. | Hussein Almuallim, Yasuhiro Akiba, Takefumi Yamazaki, Akio Yokoo, Shigeo Kaneda |
| 1994 | COLING | A System of Verbal Semantic Attributes Focused on the Syntactic Correspondence between Japanese and English. | Hiromi Nakaiwa, Akio Yokoo, Satoru Ikehara |