A Web-Based Visualization System for Interdisciplinary Research Using Japanese Local Political Corpus

  • Hokuto OtotakeEmail author
  • Hiroki Sakaji
  • Keiichi Takamaru
  • Akio Kobayashi
  • Yuzu Uchida
  • Yasutomo Kimura
Conference paper
Part of the Lecture Notes on Data Engineering and Communications Technologies book series (LNDECT, volume 7)


This paper describes a web-based visualization system, for interdisciplinary research, using the Japanese local political corpus. We illustrate the system for the corpus, which contains the local assembly minutes of 47 Japanese prefectures from April 2011 to March 2015. This four-year period coincides with the office term for assembly members in most local governments. Our system provides full-text search features for utterances, context word extraction using Key Words in Context (KWIC), map visualization, cross-tabulation tables, and political keyword extraction using TF–IDF. We endowed the system with these features to promote its wide range use in various research fields.


Visualization system Local assembly minutes 



This work was supported by JSPS KAKENHI Grant Number JP16H02912.


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Copyright information

© Springer International Publishing AG 2018

Authors and Affiliations

  • Hokuto Ototake
    • 1
    Email author
  • Hiroki Sakaji
    • 2
  • Keiichi Takamaru
    • 3
  • Akio Kobayashi
    • 4
  • Yuzu Uchida
    • 5
  • Yasutomo Kimura
    • 6
  1. 1.Fukuoka UniversityFukuokaJapan
  2. 2.The University of TokyoTokyoJapan
  3. 3.Utsunomiya Kyowa UniversityUtsunomiyaJapan
  4. 4.Toyohashi University of TechnologyToyohashiJapan
  5. 5.Hokkai-Gakuen UniversitySapporoJapan
  6. 6.Otaru University of CommerceOtaruJapan

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