Tokyo Metropolitan University

Natural Language Processing Group

Natural language processing and computational linguistics research group at the Tokyo Metropolitan University. We aim at creating a research hub for natural language processing in Tokyo. We are currently not accepting any international students due to the COVID-19 (and PI's sabbatical).

Keywords

natural language processing (machine translation, error correction/detection, information extraction, semantic analysis), web mining, machine learning (deep learning, representation learning)

News

  • 2021/12/28 Following papers have been accepted at top journals!

    • Yuting Zhao, Tomoyuki Kajiwara (Ehime University), Mamoru Komachi, Chenhui Chu (Kyoto University). Region-Attentive Multimodal Neural Machine Translation. Neurocomputing. (accepted)

    • Yuting Zhao, Tomoyuki Kajiwara (Ehime University), Mamoru Komachi, Chenhui Chu (Kyoto University). Word-Region Alignment-Guided Multimodal Neural Machine Translation. IEEE/ACM Transactions on Audio, Speech and Language Processing. (accepted)


  • 2021/10/13 Following papers have been accepted at PACLIC 2021!

    • Kazuma Kobayashi, Taichi Aida and Mamoru Komachi. Analyzing Semantic Changes in Japanese Words Using BERT. PACLIC 2021.

    • Taichi Aida, Mamoru Komachi, Toshinobu Ogiso (National Institute for Japanese Language and Linguistics), Hiroya Takamura (National Institute of Advanced Science and Technology), Daichi Mochihashi (The Institute of Statistical Mathematics). A Comprehensive Analysis of PMI-based Models for Measuring Semantic Differences. PACLIC 2021.

    • Hwichan Kim and Mamoru Komachi. Can Monolingual Pre-trained Encoder-Decoder Improve NMT for Distant Language Pairs? PACLIC 2021.

  • 2021/05/15 Following paper has been accepted as a Student Research Workshop paper at ACL-IJCNLP 2021!

    • Seiichi Inoue, Taichi Aida, Mamoru Komachi and Manabu Asai (Soka University). Modeling Text using the Continuous Space Topic Model with Pre-Trained Word Embeddings. ACL-IJCNLP 2021 Student Research Workshop (SRW). August, 2021. (accepted)

  • 2021/05/07 Following paper has been accepted as a Findings paper at ACL-IJCNLP 2021!

    • Zhousi Chen, Longtu Zhang, Aizhan Imankulova and Mamoru Komachi. Neural Combinatory Constituency Parsing. Findings of The Joint Conference of the 59th Annual Meeting of the Association for Computational Linguistics and the 11th International Joint Conference on Natural Language Processing (ACL-IJCNLP 2021). (accepted)

  • 2021/04/08 Following papers have been accepted at NAACL-HLT 2021 and NAACL Student Research Workshop 2021!

    • Rob van der Goot (IT University of Copenhagen), Marija Stepanovic (IT University of Copenhagen), Alan Ramponi (IT University of Copenhagen), Ibrahim Sharaf, Ahmet Üstün (University of Groningen), Aizhan Imankulova, Siti Oryza Khairunnisa, Mamoru Komachi and Barbara Plank (IT University of Copenhagen). From Masked-Language Modeling to Translation: Non-English Auxiliary Tasks Improve Zero-shot Spoken Language Understanding. 2021 Annual Conference of the North American Chapter of the Association for Computational Linguistics (NAACL-HLT 2021). June, 2021.

    • Seiichiro Kondo, Kengo Hotate, Tosho Hirasawa, Masahiro Kaneko and Mamoru Komachi. Sentence Concatenation Approach to Data Augmentation for Neural Machine Translation. NAACL Student Research Workshop (SRW) 2021. June, 2021. (accepted)

    • Aomi Koyama, Kengo Hotate, Masahiro Kaneko and Mamoru Komachi. Comparison of Grammatical Error Correction Using Back-Translation Models. NAACL Student Research Workshop (SRW) 2021. June, 2021. (accepted)

  • 2021/01/12 Following papers have been accepted at EACL 2021!

    • Masahiro Kaneko and Danushka Bollegala (University of Liverpool). Debiasing Pre-trained Contextualised Embeddings. The 16th Conference of the European Chapter of the Association for Computational Linguistics (EACL). April, 2021. (accepted)

    • Masahiro Kaneko and Danushka Bollegala (University of Liverpool). Dictionary-based Debiasing of Pre-trained Word Embeddings. The 16th Conference of the European Chapter of the Association for Computational Linguistics (EACL). April, 2021. (accepted)