Junta Mizuno


Understanding User Utterances in a Dialog System for Caregiving
Yoshihiko Asao | Julien Kloetzer | Junta Mizuno | Dai Saiki | Kazuma Kadowaki | Kentaro Torisawa
Proceedings of the Twelfth Language Resources and Evaluation Conference

A dialog system that can monitor the health status of seniors has a huge potential for solving the labor force shortage in the caregiving industry in aging societies. As a part of efforts to create such a system, we are developing two modules that are aimed to correctly interpret user utterances: (i) a yes/no response classifier, which categorizes responses to health-related yes/no questions that the system asks; and (ii) an entailment recognizer, which detects users’ voluntary mentions about their health status. To apply machine learning approaches to the development of the modules, we created large annotated datasets of 280,467 question-response pairs and 38,868 voluntary utterances. For question-response pairs, we asked annotators to avoid direct “yes” or “no” answers, so that our data could cover a wide range of possible natural language responses. The two modules were implemented by fine-tuning a BERT model, which is a recent successful neural network model. For the yes/no response classifier, the macro-average of the average precisions (APs) over all of our four categories (Yes/No/Unknown/Other) was 82.6% (96.3% for “yes” responses and 91.8% for “no” responses), while for the entailment recognizer it was 89.9%.


WISDOM X, DISAANA and D-SUMM: Large-scale NLP Systems for Analyzing Textual Big Data
Junta Mizuno | Masahiro Tanaka | Kiyonori Ohtake | Jong-Hoon Oh | Julien Kloetzer | Chikara Hashimoto | Kentaro Torisawa
Proceedings of COLING 2016, the 26th International Conference on Computational Linguistics: System Demonstrations

We demonstrate our large-scale NLP systems: WISDOM X, DISAANA, and D-SUMM. WISDOM X provides numerous possible answers including unpredictable ones to widely diverse natural language questions to provide deep insights about a broad range of issues. DISAANA and D-SUMM enable us to assess the damage caused by large-scale disasters in real time using Twitter as an information source.


Recognizing Complex Negation on Twitter
Junta Mizuno | Canasai Kruengkrai | Kiyonori Ohtake | Chikara Hashimoto | Kentaro Torisawa | Julien Kloetzer | Kentaro Inui
Proceedings of the 29th Pacific Asia Conference on Language, Information and Computation

Semantic Annotation of Japanese Functional Expressions and its Impact on Factuality Analysis
Yudai Kamioka | Kazuya Narita | Junta Mizuno | Miwa Kanno | Kentaro Inui
Proceedings of the 9th Linguistic Annotation Workshop


A Corpus Study for Identifying Evidence on Microblogs
Paul Reisert | Junta Mizuno | Miwa Kanno | Naoaki Okazaki | Kentaro Inui
Proceedings of LAW VIII - The 8th Linguistic Annotation Workshop


Extracting and Aggregating False Information from Microblogs
Naoaki Okazaki | Keita Nabeshima | Kento Watanabe | Junta Mizuno | Kentaro Inui
Proceedings of the Workshop on Language Processing and Crisis Information 2013

A Lexicon-based Investigation of Research Issues in Japanese Factuality Analysis
Kazuya Narita | Junta Mizuno | Kentaro Inui
Proceedings of the Sixth International Joint Conference on Natural Language Processing

NICT Disaster Information Analysis System
Kiyonori Ohtake | Jun Goto | Stijn De Saeger | Kentaro Torisawa | Junta Mizuno | Kentaro Inui
The Companion Volume of the Proceedings of IJCNLP 2013: System Demonstrations

Is a 204 cm Man Tall or Small ? Acquisition of Numerical Common Sense from the Web
Katsuma Narisawa | Yotaro Watanabe | Junta Mizuno | Naoaki Okazaki | Kentaro Inui
Proceedings of the 51st Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers)


A Latent Discriminative Model for Compositional Entailment Relation Recognition using Natural Logic
Yotaro Watanabe | Junta Mizuno | Eric Nichols | Naoaki Okazaki | Kentaro Inui
Proceedings of COLING 2012


Recognizing Confinement in Web Texts
Megumi Ohki | Eric Nichols | Suguru Matsuyoshi | Koji Murakami | Junta Mizuno | Shouko Masuda | Kentaro Inui | Yuji Matsumoto
Proceedings of the Ninth International Conference on Computational Semantics (IWCS 2011)


Automatic Classification of Semantic Relations between Facts and Opinions
Koji Murakami | Eric Nichols | Junta Mizuno | Yotaro Watanabe | Hayato Goto | Megumi Ohki | Suguru Matsuyoshi | Kentaro Inui | Yuji Matsumoto
Proceedings of the Second Workshop on NLP Challenges in the Information Explosion Era (NLPIX 2010)