--- title: "Tetsuji Nakagawa · Google — author profile and papers" description: "Tetsuji Nakagawa, Google: 2 papers on Elamur Research (2010–2018), h-index 12 — affiliations, topics, co-authors and who cites them in…" canonical: "https://research.elamur.ai/free/en/authors/tetsuji-nakagawa/" --- [Elamur Research](https://md.research.elamur.ai/free/en/) · [this page in HTML](https://research.elamur.ai/free/en/authors/tetsuji-nakagawa/) [home](https://md.research.elamur.ai/free/en/) / [authors](https://md.research.elamur.ai/free/en/authors/) / Tetsuji Nakagawa # Tetsuji Nakagawa Tetsuji Nakagawa has 2 papers in our library, in 2010–2018, most of them on [Machine translation](https://md.research.elamur.ai/free/en/topics/machine-translation/), [Sentiment & emotion](https://md.research.elamur.ai/free/en/topics/sentiment-emotion/); often with [Ciprian Chelba](https://md.research.elamur.ai/free/en/authors/ciprian-chelba/), [Kentaro Inui](https://md.research.elamur.ai/free/en/authors/kentaro-inui/), [Macduff Hughes](https://md.research.elamur.ai/free/en/authors/macduff-hughes/). 2 papers in our library · 2010–2018 [OpenAlex](https://openalex.org/A5109037387) · [**h-index 12**](https://openalex.org/authors/A5109037387) · [32 works](https://openalex.org/works?filter=author.id:A5109037387) · [810 citations](https://openalex.org/works?filter=author.id:A5109037387&sort=cited_by_count:desc) OpenAlex, 2026-10-14 [📄 2 works in our library](https://md.research.elamur.ai/free/en/authors/tetsuji-nakagawa/#papers) · [🔗 Cited 142 times in our library](https://md.research.elamur.ai/free/en/authors/tetsuji-nakagawa/cited-by/) · [3 more in our library without a page yet](#also) · [⭐ Paper Stars ranking: #5863](https://md.research.elamur.ai/free/en/paper-stars/page/59/#star-5863) The profile is the library's match of the name; two people with one name are not always told apart. Elsewhere: [Google Scholar](https://scholar.google.com/citations?view_op=search_authors&mauthors=Tetsuji+Nakagawa) · [Semantic Scholar](https://www.semanticscholar.org/search?q=Tetsuji+Nakagawa) · [dblp](https://dblp.org/search?q=Tetsuji+Nakagawa) · [ACL Anthology](https://aclanthology.org/search/?q=Tetsuji+Nakagawa) ## Affiliations [🏢**Google** Mountain View · United States 2015–2025 · 4 papers*current*](https://md.research.elamur.ai/free/en/companies/google/) · [🔬**National Institute of Information and Communications Technology** Tokyo · Japan 2008–2011 · 9 papers](https://md.research.elamur.ai/free/en/labs/national-institute-of-information-and-communications-technology/) · [🏢**Oki Electric Industry** Tokyo · Japan 2004–2007 · 3 papers](https://ror.org/0503rt987) · [🎓**Nara Institute of Science and Technology** Ikoma · Japan 2001–2002 · 2 papers](https://md.research.elamur.ai/free/en/universities/nara-institute-of-science-and-technology/) From the bylines of their papers (OpenAlex, 2026-10-14), ORCID and Wikidata; institutions on papers are matched by machine. 1 more institution on single bylines are not listed. ## Fields, topics and concepts Of its works in our library, with the number of works on each. 📚 Shelves 4 The field of science this work belongs to (OpenAlex fields).[Artificial Intelligence · 2 works](https://md.research.elamur.ai/free/en/shelves/computer-science/artificial-intelligence/) · [Arts and Humanities · 2 works](https://md.research.elamur.ai/free/en/shelves/arts-and-humanities/) · [Computer Science · 2 works](https://md.research.elamur.ai/free/en/shelves/computer-science/) · [Language and Linguistics · 2 works](https://md.research.elamur.ai/free/en/shelves/arts-and-humanities/language-and-linguistics/) 🧭 Topics 2 Research subjects and languages the work is about.[Machine translation · 1 work](https://md.research.elamur.ai/free/en/topics/machine-translation/) · [Sentiment & emotion · 1 work](https://md.research.elamur.ai/free/en/topics/sentiment-emotion/) ## Works by year ### 2010s [**2018** 1 paper](https://md.research.elamur.ai/free/en/authors/tetsuji-nakagawa/year/2018/) · [**2010** 1 paper](https://md.research.elamur.ai/free/en/authors/tetsuji-nakagawa/year/2010/) ## Papers The most cited first (OpenAlex and our library). 1. **[Denoising Neural Machine Translation Training with Trusted Data and Online Data Selection](https://md.research.elamur.ai/free/en/papers/wang-2018-denoising-neural-machine-translation-training/)** *(2018 · 114 citations)* Web-crawled and automatically mined parallel corpora often contain misaligned, partially translated or otherwise flawed sentence pairs, and NMT is more sensitive to such noise than SMT. 2. **[Dependency Tree-based Sentiment Classification using CRFs with Hidden Variables](https://md.research.elamur.ai/free/en/papers/nakagawa-2010-dependency-tree-based-sentiment-classification/)** *(2010 · 66 citations)* The paper addresses sentence-level polarity classification (positive vs. negative) of subjective sentences in Japanese and English. Bag-of-words models handle this poorly because some words flip the polarity of the material they govern. For example, "prevents" turns a negative phrase about disease into a positive… ## All works 5 works of theirs in our library, the most cited first; 2 with a page here, the others link their original until we summarise them. 1. **[Denoising Neural Machine Translation Training with Trusted Data and Online Data Selection](https://md.research.elamur.ai/free/en/papers/wang-2018-denoising-neural-machine-translation-training/) [Conference on Machine Translation: Research Papers](https://md.research.elamur.ai/free/en/venues/conference-on-machine-translation-research-papers/)**Wei Wang, Taro Watanabe, Macduff Hughes, et al.*2018 · 114 citations* 2. **[Dependency Tree-based Sentiment Classification using CRFs with Hidden Variables](https://md.research.elamur.ai/free/en/papers/nakagawa-2010-dependency-tree-based-sentiment-classification/) [Conference of the North American Chapter of the Association for Computational Linguistics (NAACL)](https://md.research.elamur.ai/free/en/venues/naacl/)**Tetsuji Nakagawa, Kentaro Inui, Sadao Kurohashi*2010 · 66 citations* 3. **[Efficient Top-Down BTG Parsing for Machine Translation Preordering ↗](https://aclanthology.org/P15-1021/) Proceedings of the 53rd Annual Meeting of the Association for Computational Linguistics and the 7th International Joint Conference on Natural Language Processing (Volume 1: Long Papers) · no summary yet**Nakagawa, Tetsuji*2015 · 44 citations* 4. **[MetricX-25 and GemSpanEval: Google Translate Submissions to the WMT25 Evaluation Shared Task ↗](https://aclanthology.org/2025.wmt-1.70/) Proceedings of the Tenth Conference on Machine Translation · no summary yet**Juraj Juraska et al.*2025 · 11 citations* 5. **[Penalizing Length: Uncovering Systematic Bias in Quality Estimation Metrics ↗](https://arxiv.org/abs/2510.22028) arXiv:2510.22028 · no summary yet**Yilin Zhang et al.*2025 · 2 citations* ## Co-authors here 6 co-authors with a page, the most papers together first. - [Ciprian Chelba](https://md.research.elamur.ai/free/en/authors/ciprian-chelba/) - [Kentaro Inui](https://md.research.elamur.ai/free/en/authors/kentaro-inui/) - [Macduff Hughes](https://md.research.elamur.ai/free/en/authors/macduff-hughes/) - [Sadao Kurohashi](https://md.research.elamur.ai/free/en/authors/sadao-kurohashi/) - [Taro Watanabe](https://md.research.elamur.ai/free/en/authors/taro-watanabe/) - [Wei Wang](https://md.research.elamur.ai/free/en/authors/wei-wang/) ## Venues Where their works here were published, the most works first, with the editions of those that have a page. - [Conference on Machine Translation: Research Papers](https://md.research.elamur.ai/free/en/venues/conference-on-machine-translation-research-papers/): [Conference on Machine Translation: Research Papers 2018](https://md.research.elamur.ai/free/en/venues/conference-on-machine-translation-research-papers/2018/) - [Conference of the North American Chapter of the Association for Computational Linguistics (NAACL)](https://md.research.elamur.ai/free/en/venues/naacl/): [NAACL 2010](https://md.research.elamur.ai/free/en/venues/naacl/2010/) - Proceedings of the 53rd Annual Meeting of the Association for Computational Linguistics and the 7th International Joint Conference on Natural Language Processing (Volume 1: Long Papers) - Proceedings of the Tenth Conference on Machine Translation ## Cited by Papers of our library cite their works 142 times (of the 149,439 papers whose bibliographies we read); [21 citing papers with a page here →](https://md.research.elamur.ai/free/en/authors/tetsuji-nakagawa/cited-by/). Updated 30 October 2026