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Clarifying the Characteristics and Irregularities of the Japanese Diet through Comparative Parliamentary Text Analysis of Japan, the UK, and France using Natural Language Processing Techniques

Research Project

Project/Area Number 20K20509
Research Category

Grant-in-Aid for Challenging Research (Pioneering)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 6:Political science and related fields
Research InstitutionGakushuin University

Principal Investigator

NONAKA NAOTO  学習院大学, 法学部, 教授 (90264697)

Co-Investigator(Kenkyū-buntansha) 久保山 哲二  学習院大学, 付置研究所, 教授 (80302660)
狩野 芳伸  静岡大学, 情報学部, 准教授 (20506729)
三輪 洋文  学習院大学, 法学部, 教授 (20780258)
Project Period (FY) 2020-07-30 – 2025-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥20,800,000 (Direct Cost: ¥16,000,000、Indirect Cost: ¥4,800,000)
Fiscal Year 2023: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2022: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2021: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2020: ¥7,930,000 (Direct Cost: ¥6,100,000、Indirect Cost: ¥1,830,000)
Keywords国会 / 国会会議録 / 自然言語処理 / 与党の国会からの退出 / SNS / 生成系AI / 議会スピーチ / 比較議会論 / Bert / 議会テキスト / 議会討論 / 画像処理 / 日英仏比較 / トピックモデル / 議会テキスト分析 / 議会データベース / 国会の特質
Outline of Research at the Start

本研究では、申請代表者がこれまでに蓄積・データベース化してきた大量の議会(国会)審議記録のテキストを対象とし、自然言語処理の技術革新を取り込むことによって新しい融合的な実証研究を展開し、それによって比較議会論から見た国会研究の水準とその理解を飛躍的に高めることを目指す。
こうした作業によって、国会での議員間「討論」や与野党間関係に関わるいくつかの重要な特質が比較議会論的な見地から明らかになる。

Outline of Final Research Achievements

To clarify the unique characteristics of Japan's parliament, we have accumulated data acquisition and analysis efforts by leveraging new natural language processing techniques using textual records of parliamentary proceedings. We have comprehensively collected data from speech transcripts and incorporated additional metadata related to individual legislators, organizing this information into a relational database. Additionally, we have undertaken text digitization from image-based documents.
Building upon this foundation, we conducted further analyses using natural language processing technologies, extracting various novel features that served as the basis for statistical analysis. With comparisons to countries such as the United Kingdom and France in mind, we have been working on papers intended for submission and publication in international academic journals, some of which have already been published.

Academic Significance and Societal Importance of the Research Achievements

本研究によって、よく指摘される国会形骸化の具体的な実態を特定し、日本政治の全体的な特質とどのように関連しているのかの解明に貢献した。野党議員のスピーチ活動が活発なのに対して与党議員が極めて不活発であること、与野党の議員間の討論が皆無に近いほどに少ないことなどを明らかにした。
また、与党議員の活動は極端に不活発で、国会から「退出」したようになっていることも明らかになった。そしてそれは、自民党による長期政権が続く中で形成された慣行で、その裏側には与党事前審査制による政策決定の仕組みがであることも明らかになった。また、SNSや世論調査の関連での分析ツールの開発という面でも多くの進展をもたらした。

Report

(6 results)
  • 2024 Annual Research Report   Final Research Report ( PDF )
  • 2023 Research-status Report
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (33 results)

All 2025 2024 2023 2022

All Journal Article (15 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 13 results,  Open Access: 9 results) Presentation (18 results) (of which Int'l Joint Research: 4 results)

  • [Journal Article] Analyzing gender gaps in bicameral legislatures: How asymmetrical institutions affect the supply and demand for female candidates2025

    • Author(s)
      Ono Yoshikuni、Kasuya Yuko、Miwa Hirofumi
    • Journal Title

      Legislative Studies Quarterly

      Volume: ― Issue: 3 Pages: 1-15

    • DOI

      10.1111/lsq.12493

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] SAT solver-driven approach for validating local electron counting rule2025

    • Author(s)
      Kuboyama Tetsuji、Kusaba Akira
    • Journal Title

      Journal of Crystal Growth

      Volume: 650 Pages: 127927-127927

    • DOI

      10.1016/j.jcrysgro.2024.127927

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Fast Filtering for Similarity Search Using Conjunctive Enumeration of Sketches in Order of Hamming Distance2024

    • Author(s)
      N. Higuchi, Y. Imamura, V. Mic, T. Shinohara, K. Hirata, T. Kuboyama
    • Journal Title

      International Conference on Pattern Recognition Applications and Methods (ICPRAM)

      Volume: - Pages: 499-510

    • DOI

      10.5220/0012322700003654

    • Related Report
      2023 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] ガラパゴス化した国会の改革2024

    • Author(s)
      野中尚人
    • Journal Title

      学士会会報

      Volume: 964 Pages: 43-47

    • Related Report
      2023 Research-status Report
  • [Journal Article] DCZAR: ゼロ照応解析に基づく項省略補完による対話応答生成2024

    • Author(s)
      上山彩夏, 狩野芳伸
    • Journal Title

      人工知能学会誌

      Volume: 39巻3号

    • Related Report
      2023 Research-status Report
    • Peer Reviewed
  • [Journal Article] Overview and Discussion of the Competition on Legal Information, Extraction/Entailment2024

    • Author(s)
      Randy Goebel, Yoshinobu Kano et al.
    • Journal Title

      The Review of Socionetwork Strategies

      Volume: COLIEE 2023 Issue: 1 Pages: 27-47

    • DOI

      10.1007/s12626-023-00152-0

    • Related Report
      2023 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Party Theory of Parliamentary Debate and the Endogenous Nature of Parliamentary Institutions: Theoretical Implications from Japan’s Diet2023

    • Author(s)
      Naoto Nonaka and Hirofumi Miwa
    • Journal Title

      Party Politics

      Volume: - Issue: 1 Pages: 1-11

    • DOI

      10.1177/13540688231195197

    • Related Report
      2023 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] イデオロギーをどう測定するか2023

    • Author(s)
      三輪洋文
    • Journal Title

      三色旗

      Volume: 847 Pages: 3-10

    • Related Report
      2023 Research-status Report
  • [Journal Article] ObstructionからNegative Agenda Powerへ -一党優位体制下の戦後国会において野党が獲得した影響力の本質2023

    • Author(s)
      野中尚人
    • Journal Title

      学習院大学法学会雑誌

      Volume: 59巻1号 Pages: 173-202

    • Related Report
      2023 Research-status Report
    • Peer Reviewed
  • [Journal Article] Acquisition of Characteristic Tag Tree Patterns with Wildcards using Edit Distance and Evolutionary Learning2023

    • Author(s)
      丹睦月,宮原 哲浩,鈴木祐介,久保山哲二,内田智之
    • Journal Title

      Proceedings of the Annual Conference of JSAI

      Volume: JSAI2023 Issue: 0 Pages: 2A1GS202-2A1GS202

    • DOI

      10.11517/pjsai.JSAI2023.0_2A1GS202

    • ISSN
      2758-7347
    • Related Report
      2023 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Contribution Analysis of Large Language Models and Data Augmentations in Solving Legal Bar Examination2023

    • Author(s)
      Takaaki Onaga, Masaki Fujita, Yoshinobu Kano
    • Journal Title

      Review of Socionetwork Strategies

      Volume: COLIEE 2023 Issue: 1 Pages: 123-143

    • DOI

      10.1007/s12626-024-00155-5

    • Related Report
      2023 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] COLIEE 2022 Summary: Methods for Legal Document Retrieval and Entailment2023

    • Author(s)
      Mi-Young Kim, Juliano Rabelo, Randy Goebel, Masaharu Yoshioka, Yoshinobu Kano et al.
    • Journal Title

      Lecture Notes in Computer Science

      Volume: 13859 Pages: 51-67

    • Related Report
      2023 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Legal Textual Entailment Using Ensemble of Rule-Based and BERT-Based Method with Data Augmentation by Related Article Generation2023

    • Author(s)
      Masaki Fujita, Takaaki Onaga, Ayaka Ueyama, Yoshinobu Kano
    • Journal Title

      Lecture Notes in Computer Science

      Volume: 13859 Pages: 138-153

    • DOI

      10.1007/978-3-031-29168-5_10

    • ISBN
      9783031291678, 9783031291685
    • Related Report
      2023 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] マイクロクラスタリングを用いた選挙公報テキスト分析2022

    • Author(s)
      杉山佳奈美・久保山哲二・三輪洋文・宇野毅明
    • Journal Title

      じんもんこん2022論文集

      Volume: 2022 Issue: 5 Pages: 289-294

    • DOI

      10.1080/21565503.2022.2087192

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Construction of Japanese Imperial Diet Database Using Deep Neural Network2022

    • Author(s)
      Naoki Nonaka & Naoto Nonaka
    • Journal Title

      Journal of Information Processing

      Volume: 30 Issue: 0 Pages: 411-421

    • DOI

      10.2197/ipsjjip.30.411

    • ISSN
      1882-6652
    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Measuring Public Mood by Poll Aggregation with Machine Learning on Poll Question Texts2025

    • Author(s)
      Hirofumi Miwa, Akira Nakada, and Yoshinobu Kano
    • Organizer
      Program on U.S.-Japan Relations Associates' Panel, “New Frontiers in Japanese Public Opinion Research”
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 多次元な世論ムード推定のためのトピックモデルとIRTの統合モデル2025

    • Author(s)
      三輪洋文・中村健太郎
    • Organizer
      第19回日本統計学会春季集会
    • Related Report
      2024 Annual Research Report
  • [Presentation] 性別による違いに着目した日本の国会議員に対するオンラインハラスメントの分析2025

    • Author(s)
      三輪洋文・仲田明良・狩野芳伸
    • Organizer
      2025年度人工知能学会全国大会(第39回)
    • Related Report
      2024 Annual Research Report
  • [Presentation] Gendered Perceptions of Leadership Roles in Legislatures: Implications for the Underrepresentation of Women as Chairpersons2024

    • Author(s)
      Yuya Endo, Hirofumi Miwa, and Yoshikuni Ono
    • Organizer
      The 120th Annual Meeting of the American Political Science Association
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 世論調査集積法による日本における世論ムードの測定2024

    • Author(s)
      三輪洋文・仲田明良・狩野芳伸
    • Organizer
      日本政治学会2024年度研究大会
    • Related Report
      2024 Annual Research Report
  • [Presentation] 日本の国会議員に対するオンラインハラスメントの記述的分析2024

    • Author(s)
      三輪洋文・仲田明良・狩野芳伸
    • Organizer
      公共選択学会第28回大会
    • Related Report
      2024 Annual Research Report
  • [Presentation] Exploring Disparities in Subjective Discrimination Assessments: A Comparative Vignette Experiment between Humans and ChatGPT2023

    • Author(s)
      五十嵐彰・狩野芳伸・三輪洋文
    • Organizer
      計量・数理政治研究会2023年夏季集会
    • Related Report
      2023 Research-status Report
  • [Presentation] Dialogue Response Generation Using Completion of Omitted Predicate Arguments Based on Zero Anaphora Resolution2023

    • Author(s)
      Ayaka Ueyama, Yoshinobu Kano
    • Organizer
      24th Meeting of the Special Interest Group on Discourse and Dialogue
    • Related Report
      2023 Research-status Report
    • Int'l Joint Research
  • [Presentation] Japanese Legal Bar Problem Solver Focusing on Person Names2023

    • Author(s)
      Takaaki Onaga, Masaki Fujita and Yoshinobu Kano
    • Organizer
      Workshop on International Conference on Artificial Intelligence and Law
    • Related Report
      2023 Research-status Report
  • [Presentation] KIS's Stance Classfication Model at the NTCIR-17 QA Lab-PoliInfo-42023

    • Author(s)
      Akira Nakada and Yoshinobu Kano
    • Organizer
      NTCIR-17 conference
    • Related Report
      2023 Research-status Report
  • [Presentation] AIWolfDial 2023: Summary of Natural Language Division of 5th International AIWolf Contest2023

    • Author(s)
      Yoshinobu Kano, Neo Watanabe, Kaito Kagaminuma et al.
    • Organizer
      The 16th International Natural Language Generation Conference
    • Related Report
      2023 Research-status Report
    • Int'l Joint Research
  • [Presentation] 生成AIの可能性と限界2023

    • Author(s)
      狩野芳伸
    • Organizer
      立命館シンポジウム「AI技術の応用と法的課題」
    • Related Report
      2023 Research-status Report
  • [Presentation] 機械学習による精神疾患の分類と有効的な特徴量についての検討2023

    • Author(s)
      田中 宏和、香月 祥、中村 啓伸、岸本 泰士郎、狩野 芳伸
    • Organizer
      2023年度人工知能学会全国大会
    • Related Report
      2023 Research-status Report
  • [Presentation] 新型コロナ感染症発生届の分析-記載における非効率と自然言語処理による解決への課題と展望2023

    • Author(s)
      福本 拓也、坂根 亜美、村松 俊平、五十嵐 正尚、狩野 芳伸、荒牧 英治、堀口 裕正、奥村 貴史
    • Organizer
      2023年度人工知能学会全国大会
    • Related Report
      2023 Research-status Report
  • [Presentation] ツイートテキストデータによるリツイート数予測とその要因分析2023

    • Author(s)
      増川哲太, 雨宮正弥, 仲田明良, 高須遼, 狩野芳伸
    • Organizer
      言語処理学会第29回年次大会(NLP2023)
    • Related Report
      2022 Research-status Report
  • [Presentation] マスク言語モデルにおける重点的なマスク選択での追加的学習を用いた法律文書による人物役割語の推測2023

    • Author(s)
      翁長駿光, 藤田真伎, 狩野芳伸
    • Organizer
      言語処理学会第29回年次大会(NLP2023)
    • Related Report
      2022 Research-status Report
  • [Presentation] 名詞役割入れ替えに頑健な日本語含意関係認識2023

    • Author(s)
      雨宮正弥, 増川哲太, 仲田明良, 狩野芳伸
    • Organizer
      言語処理学会第29回年次大会(NLP2023)
    • Related Report
      2022 Research-status Report
  • [Presentation] Compromise or Differentiate? The Role of Partner Popularity in Coalition Parties? Strategic Parliamentary Speeches2022

    • Author(s)
      渥美和大・藤村直史・狩野芳伸・三輪洋文・野中尚人
    • Organizer
      公共選択学会第26回大会
    • Related Report
      2022 Research-status Report

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Published: 2020-08-03   Modified: 2026-01-16  

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