Kotaro Sakamoto


2020

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Extraction of the Argument Structure of Tokyo Metropolitan Assembly Minutes: Segmentation of Question-and-Answer Sets
Keiichi Takamaru | Yasutomo Kimura | Hideyuki Shibuki | Hokuto Ototake | Yuzu Uchida | Kotaro Sakamoto | Madoka Ishioroshi | Teruko Mitamura | Noriko Kando
Proceedings of the Twelfth Language Resources and Evaluation Conference

In this study, we construct a corpus of Japanese local assembly minutes. All speeches in an assembly were transcribed into a local assembly minutes based on the local autonomy law. Therefore, the local assembly minutes form an extremely large amount of text data. Our ultimate objectives were to summarize and present the arguments in the assemblies, and to use the minutes as primary information for arguments in local politics. To achieve this, we structured all statements in assembly minutes. We focused on the structure of the discussion, i.e., the extraction of question and answer pairs. We organized the shared task “QA Lab-PoliInfo” in NTCIR 14. We conducted a “segmentation task” to identify the scope of one question and answer in the minutes as a sub task of the shared task. For the segmentation task, 24 runs from five teams were submitted. Based on the obtained results, the best recall was 1.000, best precision was 0.940, and best F-measure was 0.895.

2019

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Strategies for an Autonomous Agent Playing the “Werewolf game” as a Stealth Werewolf
Shoji Nagayama | Jotaro Abe | Kosuke Oya | Kotaro Sakamoto | Hideyuki Shibuki | Tatsunori Mori | Noriko Kando
Proceedings of the 1st International Workshop of AI Werewolf and Dialog System (AIWolfDial2019)

2018

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Deep Learning Paradigm with Transformed Monolingual Word Embeddings for Multilingual Sentiment Analysis
Yujie Lu | Boyi Ni | Qijin Ji | Kotaro Sakamoto | Hideyuki Shibuki | Tatsunori Mori
Proceedings of the 32nd Pacific Asia Conference on Language, Information and Computation

2015

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Predicting Sector Index Movement with Microblogging Public Mood Time Series on Social Issues
Yujie Lu | Jinlong Guo | Kotaro Sakamoto | Hideyuki Shibuki | Tatsunori Mori
Proceedings of the 29th Pacific Asia Conference on Language, Information and Computation