| 2006 | ACL | Graph Branch Algorithm: An Optimum Tree Search Method for Scored Dependency Graph with Arc Co-Occurrence Constraints. | Hideki Hirakawa |
| 2000 | COLING | Automatic Refinement of a POS Tagger Using a Reliable Parser and Plain Text Corpora. | Hideki Hirakawa, Kenji Ono, Yumiko Yoshimura |
| 2000 | COLING | Kana-Kanji Conversion System with Input Support Based on Prediction. | Yumi Ichimura, Yoshimi Saito, Kazuhiro Kimura, Hideki Hirakawa |
| 2000 | LREC | Abstraction of the EDR Concept Classification and its Effectiveness in Word Sense Disambiguation. | Kazuhiro Kimura, Hideki Hirakawa |
| 1998 | ACL | Machine Translation versus Dictionary Term Translation - A Comparison for English-Japanese News Article Alignment. | Nigel Collier, Hideki Hirakawa, Akira Kumano |
| 1998 | ACL | An Experiment in Hybrid Dictionary and Statistical Sentence Alignment. | Nigel Collier, Kenji Ono, Hideki Hirakawa |
| 1996 | COLING | Inherited Feature-based Similarity Measure Based on Large Semantic Hierarchy and Large Text Corpus. | Hideki Hirakawa, Zhonghui Xu, Kenneth B. Haase |
| 1994 | COLING | Improvement In Customizability Using Translation Templates. | Satoshi Kinoshita, Akira Kumano, Hideki Hirakawa |
| 1994 | COLING | Building An MT Dictionary From Parallel Texts Based On Linguistic And Statistical Information. | Akira Kumano, Hideki Hirakawa |
| 1984 | ICLP | Eager and Lazy Enumerations in Concurrent Prolog. | Hideki Hirakawa, Takashi Chikayama, Koichi Furukawa |
| 1980 | COLING | A Machine Translation System From Japanese Into English - Another Perspective Of MT Systems. | Makoto Nagao, Jun'ichi Tsujii, Kei Mitamura, Hideki Hirakawa, Masako Kume |