Assistant Professor

Computational Linguistics Laboratory
Graduate School of Information Science
Nara Institute of Science and Technology (NAIST)

Contact: noji [at]


I’m working on computational linguistics and natural language processing, with a particular interest on the common, or universal, structural properties that may exist in all languages in the world. What is the root of such general principle of language, if exists? I like the functionalist hypothesis for this question that language may have evolved to make our communication more efficient. I enjoy to quantitatively examine a linguistic hypothesis on large-scale corpora using computational methods, and implement the found mechanism in an NLP system.

In my dissertation (1.8M), I worked on finding such general principles in the grammars using corpora (treebanks) of more than 20 languages and verified the effects of the found universal constraints in the task of unsupervised grammar induction, or unsupervised parsing.


  1. Effective Online Reordering with Arc-Eager Transitions
    Ryosuke Kohita, Hiroshi Noji, and Yuji Matsumoto, IWPT 2017 (to appear).
    [pdf] [bib]

  2. Adversarial Training for Cross-Domain Universal Dependency Parsing
    Motoki Sato, Hitoshi Manabe, Hiroshi Noji, and Yuji Matsumoto, CoNLL 2017 (Shared Task).
    [pdf] [bib]

  3. A* CCG Parsing with a Supertag and Dependency Factored Model
    Masashi Yoshikawa, Hiroshi Noji, and Yuji Matsumoto, ACL 2017.
    [pdf] [bib]

  4. Multilingual Back-and-Forth Conversion between Content and Function Head for Easy Dependency Parsing
    Ryosuke Kohita, Hiroshi Noji, and Yuji Matsumoto, EACL 2017.
    [pdf] [bib]

  5. Using Left-corner Parsing to Encode Universal Structural Constraints in Grammar Induction
    Hiroshi Noji, Yusuke Miyao, and Mark Johnson, EMNLP 2016.
    [pdf] [slides] [system] [bib]

  6. Jigg: A Framework for an Easy Natural Language Processing Pipeline
    Hiroshi Noji and Yusuke Miyao, ACL 2016 (demo track).
    [pdf] [poster] [system] [bib]

  7. Left-corner Parsing for Dependency Grammar
    Hiroshi Noji and Yusuke Miyao
    Journal of Natural Language Processing 2015. (Best paper award of the year)
    [pdf] [bib]

  8. Optimal Shift-reduce Constituent Parsing with Structured Perceptron
    Le Quang Thang, Hiroshi Noji, and Yusuke Miyao, ACL 2015.
    [pdf] [slides] [bib]

  9. Left-corner Transitions on Dependency Parsing
    Hiroshi Noji and Yusuke Miyao, COLING 2014.
    [pdf] [slides] [bib]

  10. Hierarchical Tree-Structured Stick-Breaking Priors
    Hiroshi Noji, Daichi Mochihashi, and Yusuke Miyao,
    NIPS 2013 workshop: Modern Nonparametric Methods in Machine Learning
    [pdf] [poster] [bib]

  11. Improvements to the Bayesian Topic N-gram Models
    Hiroshi Noji, Daichi Mochihashi, and Yusuke Miyao, EMNLP 2013.
    [pdf] [poster] [bib]


  • Jigg: A framwork that makes it easy to integrate an NLP tool into existing pipelines.

  • maf: A Python-based management tool for scientific experiments built on waf.


  • Best Paper Award in The Association for Natural Language Processing 2015 (March 2016)

  • Research Fellowship for Young Scientists, JSPS (Japan Society for the Promotion of Science) (2015)

  • Best Student Award of National Institute of Informatics (March 2015)

  • Incentive Award for Young Researchers of NLP-2014 (March 2014)


  • 2016: PhD at Graduate University for Advanced Studies (SOKENDAI)
    My adviser was Yusuke Miyao, and other thesis committee were: Hiroshi Nakagawa and Daichi Mochihashi (Machine Learning), Edson T. Miyamoto (Psycholinguistics), and Makoto Kanazawa (Formal Linguistics).

  • 2013: M.E at the University of Tokyo (Information Science and Technology)

  • 2011: B.E at Waseda university


  • April 2016 - present: Assistant Professor at Nara Institute of Science and Technology (NAIST).

  • 2013 - 2016: Research assistant at NII

  • 2014 - 2015: Research fellow at Center for Simulation Sciences in Ochanomizu University.

  • Oct. 2011 - March 2015: Part-time engineer at the Preferred Infrastructure Inc.

  • Summer 2011: Internship at the Preferred Infrastructure Inc.