• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Clarifying the hierarchical structure of global society using big data

Research Project

Project/Area Number 17KT0034
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeMulti-year Fund
Section特設分野
Research Field Global Studies
Research InstitutionKyoto University

Principal Investigator

Ikeda Yuichi  京都大学, 総合生存学館, 教授 (90610858)

Co-Investigator(Kenkyū-buntansha) 家富 洋  新潟大学, 自然科学系, 教授 (20168090)
水野 貴之  国立情報学研究所, 情報社会相関研究系, 准教授 (50467057)
Project Period (FY) 2017-07-18 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥18,590,000 (Direct Cost: ¥14,300,000、Indirect Cost: ¥4,290,000)
Fiscal Year 2019: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2018: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2017: ¥13,000,000 (Direct Cost: ¥10,000,000、Indirect Cost: ¥3,000,000)
Keywordsサプライチェーンネットワーク / オーナーシップネットワーク / ネットワーク科学 / 国際租税回避 / 多重ネットワーク / コミュニティ解析 / 中心性指標 / 伝統産業ネットワーク / 最適経済圏 / ネットワーク / 統計力学 / 情報工学 / 経済統計学 / 経済政策
Outline of Final Research Achievements

We investigated the hierarchical structure of globalization using big data and network science methods. We elucidated the isolation of communities hidden in the global flow of people, goods, money, and knowledge from various perspectives. We have developed the latest network science methodology to understand the reality of "disparity among communities" brought about by the "isolation of communities" that hinders the concept of economic community based on free trade. We demonstrated that network analysis of global interdependence mediated by the flow of people, goods, money, and knowledge is adequate for understanding globalization from various perspectives and clarifying its impact on isolated communities.

Academic Significance and Societal Importance of the Research Achievements

従来の研究では,様々なマクロ的なデータを集約して,マクロ的な視点から世界を理解しようとする研究が一般的であったが,現在ではその有効性と限界が広く認識されている。一方,ミクロ的なデータは,企業や地域といった個別のミクロ的な現象の調査によく用いられてきた。本プロジェクトの研究手法は,ネットワーク科学にもとづいて「世界中で開発されているミクロのデータを使ってマクロの世界を理解する」という原理を確立して,新たな価値観のもたらすことを企図する。これにより,エビデンスに基づいて政策提言を行うための,恣意的ではなく,特定の仮定に依存しないフレームワークを提供する。

Report

(5 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (130 results)

All 2021 2020 2019 2018 2017 Other

All Int'l Joint Research (1 results) Journal Article (24 results) (of which Int'l Joint Research: 6 results,  Peer Reviewed: 22 results,  Open Access: 18 results) Presentation (65 results) (of which Int'l Joint Research: 28 results,  Invited: 8 results) Book (33 results) Remarks (7 results)

  • [Int'l Joint Research] The University of Texas at Dallas(米国)

    • Related Report
      2019 Research-status Report
  • [Journal Article] From stress testing to systemic stress testing: The importance of macroprudential regulation2021

    • Author(s)
      Irena Vodenska, Hideaki Aoyama, Alexander P Becker, Yoshi Fujiwara, Hiroshi Iyetomi, Eliza Lungu
    • Journal Title

      Journal of Financial Stability

      Volume: 52 Pages: 100803-100803

    • DOI

      10.1016/j.jfs.2020.100803

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The sustainability and the survivability of Kyoto’s traditional craft industry revealed from supplier-customer network2020

    • Author(s)
      Sato Daisuke、Ikeda Yuichi、Kawai Shuichi、Schich Maxmilian
    • Journal Title

      PLOS ONE

      Volume: 15 Issue: 11 Pages: 1-23

    • DOI

      10.1371/journal.pone.0240618

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Testing “efficient supply chain propositions” using topological characterization of the global supply chain network2020

    • Author(s)
      Chakraborty Abhijit、Ikeda Yuichi
    • Journal Title

      PLOS ONE

      Volume: 15 Issue: 10 Pages: 1-18

    • DOI

      10.1371/journal.pone.0239669

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Network analysis of attitudes towards immigrants in Asia2020

    • Author(s)
      Kawasaki Rachael Kei、Ikeda Yuichi
    • Journal Title

      Applied Network Science

      Volume: 5 Issue: 1 Pages: 1-34

    • DOI

      10.1007/s41109-020-00315-w

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Multilayer network analysis of the drugs development cycle in the global pharmaceutical industry2020

    • Author(s)
      Goto Hiromitsu、Jibu Mari、Souma Wataru、Ikeda Yuichi
    • Journal Title

      Applied Network Science

      Volume: 5 Issue: 1 Pages: 1-25

    • DOI

      10.1007/s41109-020-00328-5

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Relationship between Macroeconomic Indicators and Economic Cycles in U.S.2020

    • Author(s)
      Hiroshi Iyetomi, Hideaki Aoyama, Yoshi Fujiwara, Wataru Souma, Irena Vodenska, and Hiroshi Yoshikawa
    • Journal Title

      Scientific Reports

      Volume: 10 Issue: 1 Pages: 8420-8420

    • DOI

      10.1038/s41598-020-65002-3

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Identifying the Hierarchical Influence Structure Behind Smart Sanctions Using Network Analysis2020

    • Author(s)
      Ryohei Hisano, Hiroshi Iyetomi, and Takayuki Mizuno
    • Journal Title

      Lecture Notes in Computer Science

      Volume: 12467 Pages: 95-107

    • DOI

      10.1007/978-3-030-60975-7_8

    • ISBN
      9783030609740, 9783030609757
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Power grid with 100% renewable energy for small island developing states2020

    • Author(s)
      Yuichi Ikeda
    • Journal Title

      Evolutionary and Institutional Economics Review

      Volume: 17 Issue: 1 Pages: 183-195

    • DOI

      10.1007/s40844-019-00130-8

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Location-sector analysis of international profit shifting on a multilayer ownership-tax network2020

    • Author(s)
      T. Nakamoto, O. Rouhban, Y. Ikeda
    • Journal Title

      Evolutionary and Institutional Economics Review

      Volume: 17 Issue: 1 Pages: 219-241

    • DOI

      10.1007/s40844-019-00147-z

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Special issue: The 7th International Symposium on Human Survivability “Let’s Work Together Toward Achieving the Sustainable Development Goals”2020

    • Author(s)
      Yuichi Ikeda
    • Journal Title

      Evolutionary and Institutional Economics Review

      Volume: 17 Issue: 1 Pages: 145-149

    • DOI

      10.1007/s40844-020-00161-6

    • Related Report
      2019 Research-status Report
    • Open Access
  • [Journal Article] Detecting Ethnic Spatial Distribution of Business People Using Machine Learning2020

    • Author(s)
      Joomi Jun and Takayuki Mizuno
    • Journal Title

      Information

      Volume: 11 Issue: 4 Pages: 197-197

    • DOI

      10.3390/info11040197

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Identification of Key Companies for International Profit Shifting in the Global Ownership Network2019

    • Author(s)
      T. Nakamoto, A. Chakraborty, Y. Ikeda
    • Journal Title

      Applied Network Science

      Volume: 4 Issue: 1 Pages: 1-26

    • DOI

      10.1007/s41109-019-0158-8

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Special feature: Econophysics 2017: synergetic fusion of econophysics and other fields of science, Part II2019

    • Author(s)
      Yuichi Ikeda
    • Journal Title

      Evolutionary and Institutional Economics Review

      Volume: 16 Issue: 1 Pages: 181-182

    • DOI

      10.1007/s40844-019-00128-2

    • Related Report
      2019 Research-status Report
    • Open Access
  • [Journal Article] Community structure based on circular flow in a large-scale transaction network2019

    • Author(s)
      Y. Kichikawa, H. Iyetomi, T. Iino, and H. Inoue
    • Journal Title

      Applied Network Science

      Volume: 92 Issue: 1 Pages: 92-92

    • DOI

      10.1007/s41109-019-0202-8

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Detecting Ethnic Spatial Distribution of Business People using Recurrent Neural Networks2019

    • Author(s)
      Joomi Jun and Takayuki Mizuno
    • Journal Title

      Proceeding WI '19 Companion IEEE/WIC/ACM International Conference on Web Intelligence 24800

      Volume: 1 Pages: 29-34

    • DOI

      10.1145/3358695.3360925

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Visualization of a directed network with focus on its hierarchy and circularity2019

    • Author(s)
      Yuichi Kichikawa, Takashi Iino, Hiorshi Iyetomi, and Hiroyasu Inoue
    • Journal Title

      Journal of Computational Social Science

      Volume: 2 Issue: 1 Pages: 15-23

    • DOI

      10.1007/s42001-019-00031-1

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 苗字・国籍ビッグデータによる民族の空間的特徴の把握2019

    • Author(s)
      全珠美, 水野貴之
    • Journal Title

      第18回社会システム部会研究会論文

      Volume: 1 Pages: 126-131

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] ビッグデータによって変わる未来の公的統計2019

    • Author(s)
      水野貴之
    • Journal Title

      社会と調査

      Volume: 22 Pages: 36-44

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Macroprudential Modeling Based on Spin Dynamics in a Supply Chain Network2018

    • Author(s)
      Yuichi Ikeda and Hiroshi Yoshikawa
    • Journal Title

      RIETI Discussion Paper Series

      Volume: 18-E-045 Pages: 1-25

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Trade network reconstruction and simulation with changes in trade policy2018

    • Author(s)
      Yuichi Ikeda and Hiroshi Iyetomi
    • Journal Title

      Evolutionary and Institutional Economics Review

      Volume: 15 Issue: 2 Pages: 495-513

    • DOI

      10.1007/s40844-018-0110-0

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Identification of conduit jurisdictions and community structures in the withholding tax network2018

    • Author(s)
      Tembo Nakamoto and Yuichi Ikeda
    • Journal Title

      Evolutionary and Institutional Economics Review

      Volume: 15 Issue: 2 Pages: 477-493

    • DOI

      10.1007/s40844-018-0111-z

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Community Structure Based on Circular Flow in a Large-Scale Transaction Network2018

    • Author(s)
      Yuichi Kichikawa, Hiorshi Iyetomi, Takashi Iino,and Hiroyasu Inoue
    • Journal Title

      Abstracts of the 7th Int'l Workshop on Complex Networks and their Applications

      Volume: 1 Pages: 62-64

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Complex correlation approach for high frequency financial data2018

    • Author(s)
      Wilinski Mateusz、Ikeda Yuichi、Aoyama Hideaki
    • Journal Title

      Journal of Statistical Mechanics: Theory and Experiment

      Volume: 2018 Issue: 2 Pages: 023405-023405

    • DOI

      10.1088/1742-5468/aaa8eb

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Determinants of foreign direct investment in wind energy in developing countries2017

    • Author(s)
      Keeley Alexander Ryota、Ikeda Yuichi
    • Journal Title

      Journal of Cleaner Production

      Volume: 161 Pages: 1451-1458

    • DOI

      10.1016/j.jclepro.2017.05.106

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Presentation] ソーシャルデータ分析のための教師あり機械学習2021

    • Author(s)
      水野貴之
    • Organizer
      CCSS School on Computational Social Science 2021
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 産業連関ネットワークのHelmholtz-Hodge分解:国際比較2021

    • Author(s)
      星智晴,家富洋
    • Organizer
      日本物理学会第76回年次大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 世界規模での株式所有構造のネットワーク分析2021

    • Author(s)
      家富洋,吉川悠一,池田裕一
    • Organizer
      日本物理学会第76回年次大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Cross-national Features: Network Analysis of Attitudes Towards Immigrants2020

    • Author(s)
      Rachael Kei Kawasaki, Yuichi Ikeda
    • Organizer
      The 5th International Workshop on Application of Big Data for Computational Social Science
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Economic Integration Index Evaluated from Loop Flow Component in Global Value-Added Network2020

    • Author(s)
      Sotaro Sada and Yuichi Ikeda
    • Organizer
      The 9th International Conference on Complex Networks and their Applications
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 統計力学モデルによる京都市内での観光客と市民の相平衡の検証2020

    • Author(s)
      大木 有,田中 仁海,池田 裕一
    • Organizer
      日本物理学会2020年秋季大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 再生可能エネルギーと原子力による水素コジェネレーションの経済性評価2020

    • Author(s)
      田中仁海, 池田裕一
    • Organizer
      資源エネルギー学会
    • Related Report
      2020 Annual Research Report
  • [Presentation] The Optimal Energy Mix in 20502020

    • Author(s)
      Hitomi Tanaka, Yuichi Ikeda
    • Organizer
      9th International Symposium on Human Survivability
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 仮想通貨市場での詐欺: HYIP活性の予測モデル2020

    • Author(s)
      全珠美, 水野貴之
    • Organizer
      2020年度人工知能学会(第34回)
    • Related Report
      2020 Annual Research Report
  • [Presentation] Location-based Big Data to Visualize the Risk of Infection and Economic Activity2020

    • Author(s)
      Takayuki Mizuno
    • Organizer
      Asia-Europe Consortium for AI Research (AECAIR) webinars
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Analysis of the ethnicity network using surname data2020

    • Author(s)
      Joomi Jun, Takayuki Mizuno
    • Organizer
      Conference on Complex Systems 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] COVID-19 and Location Based Big Data2020

    • Author(s)
      Takayuki Mizuno
    • Organizer
      Asian Network of Complexity Scientists Meeting 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Helmholtz- Hodge分解に基づくランダム有向ネットワークの数理的性質2020

    • Author(s)
      星智晴,家富洋
    • Organizer
      日本物理学会2020年秋季大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 産業連関ネットワークのHelmholtz-Hodge分解2020

    • Author(s)
      星智晴,家富洋
    • Organizer
      日本物理学会2020年秋季大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 産業連関構造のネットワーク解析:国際比較2020

    • Author(s)
      星智晴,家富洋
    • Organizer
      明治大学MIMS研究会「Data-driven MathematicalSciences: 経済物理とその周辺」
    • Related Report
      2020 Annual Research Report
  • [Presentation] 世界規模での株式所有構造2020

    • Author(s)
      家富洋,吉川悠一,池田裕一
    • Organizer
      明治大学MIMS研究会「Data-driven MathematicalSciences: 経済物理とその周辺」
    • Related Report
      2020 Annual Research Report
  • [Presentation] Hierarchy and Circularity in Complex Socioeconomic Networks2020

    • Author(s)
      Hiroshi Iyetomi
    • Organizer
      The B.E.S.T. Workshop on Complex Systems in Finance and Economics (a satellite meeting to the NetSci-X 2020), Kyoto University, Kyoto, January 17, 2020.
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Extract Unethical Users in Bitcoin Networks2020

    • Author(s)
      Joomi Jun, Takayuki Mizuno
    • Organizer
      NetSci-X 2020/ Waseda Univ., Tokyo, Japan/ 2020/ Jan.20-23
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Interbank Network Reconstruction based on Entropy Maximization considering Sparse Linkage2019

    • Author(s)
      Yuichi Ikeda
    • Organizer
      NetSci2019, 4th Workshop on Statistical Physics for Financial Economic Networks
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Synchronization of Global Business Cycle with Reconstructed Quarterly Value-Added Time Series2019

    • Author(s)
      Yuichi Ikeda
    • Organizer
      the 2019 Workshop on the Economic Science with Heterogeneous Interacting Agents (WEHIA)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Overview of Kyoto Interdisciplinary Blockchain Research Project2019

    • Author(s)
      Yuichi Ikeda
    • Organizer
      UBRI Connect
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] リンクのスパース性を考慮した 銀行間ネットワークの再構成2019

    • Author(s)
      池田裕一
    • Organizer
      日本物理学会 2019年秋季大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Bow-tie structure and community identification of global supply chain network2019

    • Author(s)
      A. Chakraborty and Y. Ikeda
    • Organizer
      The 8th International Conference on Complex Networks and Their Applications (Complex Networks 2019), Lisbon, Portugal, Dec. 10, 2019.
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Network structure of traditional craft industry in Kyoto2019

    • Author(s)
      D. Sato, Y. Ikeda, S. Kawai, M. Schich
    • Organizer
      The 8th International Conference on Complex Networks and Their Applications (Complex Networks 2019), Lisbon, Portugal, Dec. 10, 2019.
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Who Possesses Whom from a Point of View of the Global Ownership Network2019

    • Author(s)
      Y. Kichikawa, H. Iyetomi, Yuichi Ikeda, and Takayuki Mizuno
    • Organizer
      The 8th International Conference on Complex Networks and Their Applications (Complex Networks 2019), Lisbon, Portugal, Dec. 10, 2019.
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Measurement of Value of Firms Based on Their Stock Ownership Relations2019

    • Author(s)
      Haruka Kato, Hitomi Sato, Yuichi Kichikawa, Hiroshi Iyetomi, Wataru Souma, and Tsutomu Watanabe
    • Organizer
      The 8th International Conference on Complex Networks and Their Applications (Complex Networks 2019), Lisbon, Portugal, Dec. 10, 2019.
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Analysis of Temporal Change of Japanese Interfirm Transaction Relations as a Multilayer Network2019

    • Author(s)
      Hitomi Sato, Haruka Kato, Yuichi Kichikawa, Hiroshi Iyetomi, Ryohei Hisano, and Tsutomu Watanabe
    • Organizer
      The 8th International Conference on Complex Networks and Their Applications (Complex Networks 2019), Lisbon, Portugal, Dec. 12, 2019.
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] A Physicist's Approach to International Trade Relationship2019

    • Author(s)
      Hiroshi Iyetomi
    • Organizer
      Symposium on Machine Learning in Materials Genome, Anargyreios and Korgialeneios School of Spetses (A.K.S.S.), Spetses, Greece, June 21, 2019.
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 究極的株式所有構造に基づく企業価値の測定2019

    • Author(s)
      加藤未来,佐藤仁美,吉川悠一,家富洋,相馬亘,渡辺努
    • Organizer
      日本物理学会2019年秋季大会,岐阜大学,岐阜,2019年9月10日
    • Related Report
      2019 Research-status Report
  • [Presentation] 多層ネットワークとしての企業間取引関係の時間発展2019

    • Author(s)
      佐藤仁美,加藤未来,吉川悠一,家富洋,久野遼平,渡辺努
    • Organizer
      日本物理学会2019年秋季大会,岐阜大学,岐阜,2019年9月10日.
    • Related Report
      2019 Research-status Report
  • [Presentation] グローバル株所有ネットワークの構造と富の分布2019

    • Author(s)
      吉川悠一, 家富洋, 池田裕一, 水野貴之
    • Organizer
      日本物理学会2019年秋季大会,岐阜大学,岐阜,2019年9月10日.
    • Related Report
      2019 Research-status Report
  • [Presentation] 究極的株式所有構造に基づく企業価値の測定2019

    • Author(s)
      加藤未来,佐藤仁美,吉川悠一,家富洋,相馬亘,渡辺努
    • Organizer
      明治大学MIMS共同研究集会「Data-driven Mathematical Sciences: 経済物理学とその周辺」,明治大学中野キャンパス,東京,2019年9月14日.
    • Related Report
      2019 Research-status Report
  • [Presentation] 多層ネットワークとしての企業間取引関係の時間発展2019

    • Author(s)
      佐藤仁美,加藤未来,吉川悠一,家富洋,久野遼平,渡辺努
    • Organizer
      明治大学MIMS共同研究集会「Data-driven Mathematical Sciences: 経済物理学とその周辺」,明治大学中野キャンパス,東京,2019年9月14日.
    • Related Report
      2019 Research-status Report
  • [Presentation] 経済・社会現象を読み解くネットワーク科学2019

    • Author(s)
      家富洋
    • Organizer
      KOBE HPC サマースクール(初級), 理化学研究所計算科学研究センター,神戸,2019年8月26日.
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] 経済・社会ネットワークのHelmholtz-Hodge分解:階層性と循環性2019

    • Author(s)
      家富洋
    • Organizer
      京都大学数理解析研究所共同研究「マクロ経済動学の非線形数理」研究会,京都大学,京都,2019年10月17日.
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] Detecting Ethnic Spatial Distribution of Business People using Recurrent Neural Networks2019

    • Author(s)
      Joomi Jun and Takayuki Mizuno
    • Organizer
      The 4th International Workshop on Application of Big Data for Computational Social Science (satellite meeting of WI2019)/ Thessaloniki, Greece/ 2019/ Oct.14
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Detect Ethnic Spatial Distribution using Surname data2019

    • Author(s)
      全珠美, 水野貴之
    • Organizer
      経済・社会との分野横断的研究会/ 千代田区, 東京都/ 2019/ Nov.8
    • Related Report
      2019 Research-status Report
  • [Presentation] 再構成した四半期付加価値時系列を用いたグローバル景気循環の同期解析2019

    • Author(s)
      池田裕一
    • Organizer
      日本物理学会 第74回年次大会
    • Related Report
      2018 Research-status Report
  • [Presentation] 複雑有向ネットワークのフロー構造2019

    • Author(s)
      家富洋
    • Organizer
      文科省共同利用・共同研究拠点MIMS現象数理学拠点共同研究集会「経済物理学とその周辺:Data-driven Mathematical Science」,明治大学中野キャンパス
    • Related Report
      2018 Research-status Report
  • [Presentation] 日本の上場企業に対する究極的株式所有構造の解析2019

    • Author(s)
      加藤未来,佐藤仁美,吉川悠一,家富洋,相馬亘,渡辺努
    • Organizer
      文科省共同利用・共同研究拠点MIMS現象数理学拠点共同研究集会「経済物理学とその周辺:Data-driven Mathematical Science」,明治大学中野キャンパス
    • Related Report
      2018 Research-status Report
  • [Presentation] 動的ネットワークとしての企業間取引関係の不変性と変動性2019

    • Author(s)
      佐藤仁美,加藤未来,吉川悠一,家富洋,久野遼平,渡辺努
    • Organizer
      文科省共同利用・共同研究拠点MIMS現象数理学拠点共同研究集会「経済物理学とその周辺:Data-driven Mathematical Science」,明治大学中野キャンパス
    • Related Report
      2018 Research-status Report
  • [Presentation] 苗字・国籍ビッグデータによる民族の空間的特徴の把握2019

    • Author(s)
      全珠美, 水野貴之
    • Organizer
      第3回計算社会科学ワークショップ
    • Related Report
      2018 Research-status Report
  • [Presentation] 苗字・国籍ビッグデータによる民族の空間的特徴の把握2019

    • Author(s)
      全珠美, 水野貴之
    • Organizer
      計測自動制御学会 システム・情報部門 第18回社会システム部会研究会
    • Related Report
      2018 Research-status Report
  • [Presentation] 大規模でグローバルな「名前・出生地・誕生年」データによる民族の時空間特徴の見える化2019

    • Author(s)
      全珠美, 水野貴之
    • Organizer
      Data-Driven Mathematical Science:経済物理とその周辺/ 明治大学
    • Related Report
      2018 Research-status Report
  • [Presentation] 人流ビッグデータによる空間的セグリゲーションの抽出2019

    • Author(s)
      水野貴之
    • Organizer
      Data-Driven Mathematical Science:経済物理とその周辺/ 明治大学
    • Related Report
      2018 Research-status Report
  • [Presentation] Studying Kyoto's Sustainability2018

    • Author(s)
      Yuichi Ikeda
    • Organizer
      NETSCI2018, ACT&Network satellite
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Distress propagation from financial sector to real economy in Japan for the period of 1980 and 20152018

    • Author(s)
      Yuichi Ikeda
    • Organizer
      NETSCI2018, 3rd SPFEN Workshop
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 経済ネットワークの再構成モデル2018

    • Author(s)
      池田裕一,家富洋
    • Organizer
      日本物理学会 2018年秋季大会
    • Related Report
      2018 Research-status Report
  • [Presentation] Hierarchical Identification of Key Firms of International Tax Avoidance in Global Ownership Network2018

    • Author(s)
      T. Nakamoto, A. Chakraborty, and Y. Ikeda
    • Organizer
      Complex network 2018
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Micro Grid with 100% Renewable Energy in Small Island Developing States2018

    • Author(s)
      Yuichi Ikeda
    • Organizer
      7th International Symposium on Human Survivability
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Offshore Financial Centers in Global Ownership-Tax Rate Multilayer Network2018

    • Author(s)
      T. Nakamoto and Y. Ikeda
    • Organizer
      7th International Symposium on Human Survivability
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 貿易収支関係のネットワーク解析:2国間から多国間的視点へ2018

    • Author(s)
      家富洋,池田裕一,大西立顕,水野貴之,渡辺努
    • Organizer
      日本物理学会 2018年秋季大会
    • Related Report
      2018 Research-status Report
  • [Presentation] 有向ネットワークとしての株所有関係:階層性と循環性2018

    • Author(s)
      加藤未来,佐藤仁美,吉川悠一,家富洋,相馬亘
    • Organizer
      日本物理学会 2018年秋季大会
    • Related Report
      2018 Research-status Report
  • [Presentation] 企業間取引ネットワークにおけるコミュニティ構造の変遷2018

    • Author(s)
      佐藤仁美,加藤未来,吉川悠一,家富洋,久野遼平,渡辺努
    • Organizer
      日本物理学会 2018年秋季大会
    • Related Report
      2018 Research-status Report
  • [Presentation] A Possible Clue to the Mystery of the Excess Trade Balances2018

    • Author(s)
      Hiroshi Iyetomi, Yuichi Ikeda, Takayuki Mizuno, Takaaki Ohnishi, and Tsutomu Watanabe
    • Organizer
      International Conference on Big data in Economics, Science and Technology (BEST)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Community Structure Based on Circular Flow in a Large-Scale Transaction Network2018

    • Author(s)
      Yuichi Kichikawa, Hiroshi Iyetomi, Takashi Iino, and Hiroyasu Inoue
    • Organizer
      The 7th International Conference on Complex Networks and Their Applications (Complex Networks 2018)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] A temporal-spatial correlation between languages in multiracial societies2018

    • Author(s)
      Takayuki Mizuno, Takaaki Ohnishi and Tsutomu Watanabe
    • Organizer
      The Complexity of Conflict and Crime (satellite meeting of CCS 2018)
    • Related Report
      2018 Research-status Report
  • [Presentation] A temporal-spatial correlation network of languages in multiracial societies2018

    • Author(s)
      Takayuki Mizuno, Takaaki Ohnishi and Tsutomu Watanabe
    • Organizer
      Computational Social Science (CSS 2018) annual conference
    • Related Report
      2018 Research-status Report
  • [Presentation] Spin Model on Network for Macro-Prudential Analysis2018

    • Author(s)
      Yuichi Ikeda* (Kyoto University), Yoshiyuki Arata (RIETI), and Hiroshi Yoshikawa (Rissho University)
    • Organizer
      COMPLENET 2018, BOSTON
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 株価スピンネットワークと金融セクターに働く外場2018

    • Author(s)
      池田裕一,荒田禎之,吉川洋
    • Organizer
      日本物理学会 第73回年次大会 東京理科大 25aK702-2
    • Related Report
      2017 Research-status Report
  • [Presentation] マクロ健全性のスピンモデル2017

    • Author(s)
      池田裕一,荒田禎之,吉川洋
    • Organizer
      日本物理学会 2017年秋季大会  岩手大学 23aJ24-6
    • Related Report
      2017 Research-status Report
  • [Presentation] マクロ健全性のスピンモデルと金融セクターに働く外場の解釈2017

    • Author(s)
      池田裕一,荒田禎之,吉川洋
    • Organizer
      京都大学基研研究会  経済物理学2017  -新たな領域との融合
    • Related Report
      2017 Research-status Report
  • [Presentation] International Trade Relationship from a Multilateral Point of View2017

    • Author(s)
      H. Iyetomi, Y. Ikeda, T. Mizuno, T. Ohnishi and T. Watanabe
    • Organizer
      The 6th International Workshop on Complex Networks and Their Applications (Complex Networks 2017)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 多国間的視点における国際貿易関係2017

    • Author(s)
      家富洋,池田裕一,大西立顕,水野貴之,渡辺努
    • Organizer
      京都大学基礎物理学研究所研究会「経済物理学 2017 --- 新たな領域との融合」
    • Related Report
      2017 Research-status Report
  • [Presentation] Possible scenarios of protective trade: Reconstruction of the international trade flows by commodity and industry2017

    • Author(s)
      Y. Ikeda, H.Iyetomi, T.Mizuno, T. Ohnishi, and T. Watanabe
    • Organizer
      2nd Workshop on Statistical Physics for Financial and Economic Networks, NetSci 2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Book] 実践する総合生存学2021

    • Author(s)
      池田 裕一、京都大学総合生存学研究会
    • Total Pages
      506
    • Publisher
      京都大学学術出版会
    • ISBN
      9784814002962
    • Related Report
      2020 Annual Research Report
  • [Book] Big Data Analysis on Global Community Formation and Isolation: Sustainability and Flow2021

    • Author(s)
      Yuichi Ikeda, Hiroshi Iyetomi, Takayuki Mizuno (Eds)
    • Total Pages
      534
    • Publisher
      Springer
    • ISBN
      9789811549434
    • Related Report
      2020 Annual Research Report
  • [Book] "Global Production and Domestic Divides", In Y.Ikeda, H.Iyetomi, and T.Mizuno (Eds.), "Big Data Analysis on Global Community Formation and Isolation"2021

    • Author(s)
      Yuichi Ikeda
    • Total Pages
      21
    • Publisher
      Springer, Singapore
    • ISBN
      9789811549434
    • Related Report
      2020 Annual Research Report
  • [Book] "Is Firm-Level International Trade More Pronounced at the Inter-industry or Intra-industry Level?", In Y.Ikeda, H.Iyetomi, and T.Mizuno (Eds.), "Big Data Analysis on Global Community Formation and Isolation"2021

    • Author(s)
      Abhijit Chakraborty and Yuichi Ikeda
    • Total Pages
      40
    • Publisher
      Springer, Singapore
    • ISBN
      9789811549434
    • Related Report
      2020 Annual Research Report
  • [Book] "Supplier-Customer Network of Kyoto' s Traditional Craft Industry", In Y.Ikeda, H.Iyetomi, and T.Mizuno (Eds.), "Big Data Analysis on Global Community Formation and Isolation"2021

    • Author(s)
      Daisuke Sato and Yuichi Ikeda
    • Total Pages
      26
    • Publisher
      Springer, Singapore
    • ISBN
      9789811549434
    • Related Report
      2020 Annual Research Report
  • [Book] "Regional and Sectoral Change of Global Value-Added Network Around the 2009 Economic Crisis", In Y.Ikeda, H.Iyetomi, and T.Mizuno (Eds.), "Big Data Analysis on Global Community Formation and Isolation"2021

    • Author(s)
      Sotaro Sada and Yuichi Ikeda
    • Total Pages
      33
    • Publisher
      Springer, Singapore
    • ISBN
      9789811549434
    • Related Report
      2020 Annual Research Report
  • [Book] "International Tax Avoidance Investigated from A Network Science Perspective", In Y.Ikeda, H.Iyetomi, and T.Mizuno (Eds.), "Big Data Analysis on Global Community Formation and Isolation"2021

    • Author(s)
      Tembo Nakamoto and Yuichi Ikeda
    • Total Pages
      75
    • Publisher
      Springer, Singapore
    • ISBN
      9789811549434
    • Related Report
      2020 Annual Research Report
  • [Book] "Immigrant Integration in Asia", In Y.Ikeda, H.Iyetomi, and T.Mizuno (Eds.), "Big Data Analysis on Global Community Formation and Isolation"2021

    • Author(s)
      Rachael Kei Kawasaki and Yuichi Ikeda
    • Total Pages
      55
    • Publisher
      Springer, Singapore
    • ISBN
      9789811549434
    • Related Report
      2020 Annual Research Report
  • [Book] "Data Envelopment Analysis on the Fulfillment of Right to Health for Syrian Refugees in Turkey", In Y.Ikeda, H.Iyetomi, and T.Mizuno (Eds.), "Big Data Analysis on Global Community Formation and Isolation"2021

    • Author(s)
      Shun Kuriki and Yuichi Ikeda
    • Total Pages
      28
    • Publisher
      Springer, Singapore
    • ISBN
      9789811549434
    • Related Report
      2020 Annual Research Report
  • [Book] "Design of Social Isolation Index", In Y.Ikeda, H.Iyetomi, and T.Mizuno (Eds.), "Big Data Analysis on Global Community Formation and Isolation"2021

    • Author(s)
      Yu Ohki, Yuichi Ikeda, and Hiroshi Iyetomi
    • Total Pages
      31
    • Publisher
      Springer, Singapore
    • ISBN
      9789811549434
    • Related Report
      2020 Annual Research Report
  • [Book] "Making Policy Recommendations in International Organizations", In Y.Ikeda, H.Iyetomi, and T.Mizuno (Eds.), "Big Data Analysis on Global Community Formation and Isolation"2021

    • Author(s)
      Tembo Nakamoto, Ayaka Nomura, and Yuichi Ikeda
    • Total Pages
      35
    • Publisher
      Springer, Singapore
    • ISBN
      9789811549434
    • Related Report
      2020 Annual Research Report
  • [Book] "ビッグデータとネットワーク科学が描くグローバル分断構造の実像", In 池田裕一(編), "実践する総合生存学"2021

    • Author(s)
      池田裕一
    • Total Pages
      41
    • Publisher
      京都大学学術出版会
    • ISBN
      9784814002962
    • Related Report
      2020 Annual Research Report
  • [Book] Multilayer network approach to dynamics of japanese interfirm transaction relations. In Big Data Analysis on Global Community Formation andIsolation2021

    • Author(s)
      Hitomi Sato, Yuichi Kichikawa, Hiroshi Iyetomi, and Tsutomu Watanabe.
    • Total Pages
      33
    • Publisher
      Springer, Singapore
    • ISBN
      9789811549434
    • Related Report
      2020 Annual Research Report
  • [Book] Who possesses whom in terms of the global ownership network.In Big Data Analysis on Global Community Formation and Isolation2021

    • Author(s)
      Yuichi Kichikawa, Hiroshi Iyetomi, and Yuichi Ikeda.
    • Total Pages
      50
    • Publisher
      Springer, Singapore
    • ISBN
      9789811549434
    • Related Report
      2020 Annual Research Report
  • [Book] Stock ownership structure in Japan. In Big DataAnalysis on Global Community Formation and Isolation2021

    • Author(s)
      Haruka Kato, Yuichi Kichikawa, Hiroshi Iyetomi, and Wataru Souma
    • Total Pages
      29
    • Publisher
      Springer, Singapore
    • ISBN
      9789811549434
    • Related Report
      2020 Annual Research Report
  • [Book] Beyond “evidence-based” policymaking. In Big Data Analysis on Global Community Formation andIsolation2021

    • Author(s)
      Hiroshi Iyetomi
    • Total Pages
      12
    • Publisher
      Springer, Singapore
    • ISBN
      9789811549434
    • Related Report
      2020 Annual Research Report
  • [Book] "An Interacting Agent Model of Economic Crisis" IN Hideaki Aoyama, Yuji Aruka, Hiroshi Yoshikawa (Eds) Complexity, Heterogeneity, and the Methods of Statistical Physics in Economics2020

    • Author(s)
      Yuichi Ikeda
    • Total Pages
      22
    • Publisher
      Springer Singapore
    • ISBN
      9789811548055
    • Related Report
      2020 Annual Research Report
  • [Book] Collective phenomena in economic systems. In Complexity, Heterogeneity, and the Methods ofStatistical Physics in Economics2020

    • Author(s)
      Iyetomi, H.
    • Total Pages
      25
    • Publisher
      Springer, Singapore
    • ISBN
      9789811548055
    • Related Report
      2020 Annual Research Report
  • [Book] Complexity, Heterogeneity, and the Methods of Statistical Physics in Economics: Essays in Memory of Masanao Aoki (Y.Ikeda分担執筆:chapter 11 An Interacting Agent Model of Economic Crisis)2020

    • Author(s)
      Editor: H. Aoyama, Y. Aruka, H. Yoshikawa (Y.Ikeda第11章分担執筆)
    • Total Pages
      293
    • Publisher
      Springer Nature
    • ISBN
      9789811548055
    • Related Report
      2019 Research-status Report
  • [Book] 第14章 ブロックチェーンと機械学習がもたらす金融取引ネットワークの変革. (有賀裕二編)価値創造と分散型市場設計2020

    • Author(s)
      池田裕一
    • Total Pages
      250
    • Publisher
      中央大学企業研究所研究業書 42, 中央大学出版部.
    • Related Report
      2019 Research-status Report
  • [Book] 第16章 経済物理学から計算社会科学へ. (有賀裕二編)価値創造と分散型市場設計2020

    • Author(s)
      水野貴之
    • Total Pages
      250
    • Publisher
      中央大学企業研究所研究業書 42, 中央大学出版部.
    • Related Report
      2019 Research-status Report
  • [Book] "Analysis of Temporal Change of Japanese Interfirm Transaction Relations as a Multilayer Network", the Book of Abstracts for the 8th Int'l Workshop on Complex Networks and Their Applications (Lisbon, Portugal, 2019)2019

    • Author(s)
      Hitomi Sato, Haruka Kato, Yuichi Kichikawa, Hiroshi Iyetomi, Ryohei Hisano, and Tsutomu Watanabe
    • Total Pages
      620
    • Publisher
      the 8th Int'l Workshop on Complex Networks and Their Applications (Lisbon, Portugal, 2019)
    • ISBN
      9782955705032
    • Related Report
      2019 Research-status Report
  • [Book] "Measurement of Value of Firms Based on Their Stock Ownership Relations", the Book of Abstracts for the 8th Int'l Workshop on Complex Networks and Their Applications (Lisbon, Portugal, 2019)2019

    • Author(s)
      Haruka Kato, Hitomi Sato, Yuichi Kichikawa, Hiroshi Iyetomi, Wataru Souma, and Tsutomu Watanabe
    • Total Pages
      620
    • Publisher
      the 8th Int'l Workshop on Complex Networks and Their Applications (Lisbon, Portugal, 2019)
    • ISBN
      9782955705032
    • Related Report
      2019 Research-status Report
  • [Book] "Who Possesses Whom from a Point of View of the Global Ownership Network", the Book of Abstracts for the 8th Int'l Workshop on Complex Networks and Their Applications (Lisbon, Portugal, 2019), pp. 459-461, December 2019.2019

    • Author(s)
      Y. Kichikawa, H. Iyetomi, Yuichi Ikeda, and Takayuki Mizuno
    • Total Pages
      620
    • Publisher
      the 8th Int'l Workshop on Complex Networks and Their Applications (Lisbon, Portugal, 2019)
    • ISBN
      9782955705032
    • Related Report
      2019 Research-status Report
  • [Book] "Bow-tie Structure and Community Identification of Global Supply Chain Network", the Book of Abstracts for the 8th Int'l Workshop on Complex Networks and Their Applications (Lisbon, Portugal, 2019), pp. 415-417, December 2019.2019

    • Author(s)
      A. Chakraborty and Y. Ikeda
    • Total Pages
      620
    • Publisher
      the 8th Int'l Workshop on Complex Networks and Their Applications (Lisbon, Portugal, 2019)
    • ISBN
      9782955705032
    • Related Report
      2019 Research-status Report
  • [Book] "Network structure of traditional craft industry in Kyoto", the Book of Abstracts for the 8th Int'l Workshop on Complex Networks and Their Applications (Lisbon, Portugal, 2019), pp. 434-437, December 2019.2019

    • Author(s)
      D. Sato, Y. Ikeda, S. Kawai and M. Schich
    • Total Pages
      620
    • Publisher
      the 8th Int'l Workshop on Complex Networks and Their Applications (Lisbon, Portugal, 2019)
    • ISBN
      9782955705032
    • Related Report
      2019 Research-status Report
  • [Book] ネットワーク科学―ひと・もの・ことの関係性をデータから解き明かす新しいアプローチ―2019

    • Author(s)
      池田 裕一・井上 寛康・谷澤 俊弘監訳・京都大学ネットワーク社会研究会 訳
    • Total Pages
      472
    • Publisher
      共立出版
    • ISBN
      9784320124479
    • Related Report
      2018 Research-status Report
  • [Book] Human Survivability Studies - a new paradigm for solving global issues2018

    • Author(s)
      池田 裕一(分担執筆)
    • Total Pages
      342
    • Publisher
      Kyoto university press and trans pacific press
    • Related Report
      2018 Research-status Report
  • [Book] Simulation Study on Energy Mix for Power Generation in Temburong Eco Town2018

    • Author(s)
      池田 裕一(分担執筆)
    • Total Pages
      71
    • Publisher
      ERIA Research Project Report 2017, No.02
    • Related Report
      2018 Research-status Report
  • [Book] Evolutionary and Institutional Economics Review, Special feature: Econophysics 2017 synergetic fusion of econophysics and other fields of science2018

    • Author(s)
      池田 裕一(編者)
    • Total Pages
      317
    • Publisher
      Evolutionary and Institutional Economics Review, December 2018, Volume 15, Issue 2
    • Related Report
      2018 Research-status Report
  • [Book] Human Survivability Studies - a new paradigm for solving global issues2018

    • Author(s)
      Yuichi Ikeda (network analysis, and chapter 6)
    • Total Pages
      342
    • Publisher
      Kyoto University press, and trans pacific press
    • ISBN
      9784814001606
    • Related Report
      2017 Research-status Report
  • [Book] ネットワーク科学(L. Barabasi, Network science)2018

    • Author(s)
      池田,井上,谷澤(翻訳)
    • Total Pages
      465
    • Publisher
      共立出版(近刊)
    • Related Report
      2017 Research-status Report
  • [Book] Macro-Econophysics New Studies on Economic Networks and Synchronization2017

    • Author(s)
      Hideaki Aoyama, Yoshi Fujiwara, Yuichi Ikeda, Hiroshi Iyetomi, Wataru Souma, and Hiroshi Yoshikawa
    • Total Pages
      404
    • Publisher
      Cambridge University Press
    • Related Report
      2017 Research-status Report
  • [Remarks] 京都大学大学院総合生存学館(思修館) 池田裕一

    • URL

      https://www.gsais.kyoto-u.ac.jp/staff/ikeda/

    • Related Report
      2020 Annual Research Report
  • [Remarks] ネットワーク社会研究会

    • URL

      https://www.gsais-nsrg.com/

    • Related Report
      2020 Annual Research Report
  • [Remarks] 京都大学教育研究活動データベース:池田裕一

    • URL

      https://kyouindb.iimc.kyoto-u.ac.jp/j/pN6aW

    • Related Report
      2019 Research-status Report
  • [Remarks] 京都大学大学院総合生存学館(思修館)・総合生存学専攻・池田裕一のホームページ

    • URL

      https://www.gsais.kyoto-u.ac.jp/staff/ikeda/

    • Related Report
      2019 Research-status Report
  • [Remarks] 京都大学・ネットワーク社会研究会のホームページ

    • URL

      https://www.gsais-nsrg.com/

    • Related Report
      2019 Research-status Report
  • [Remarks] 京都大学大学院総合生存学館 池田裕一

    • URL

      https://www.gsais.kyoto-u.ac.jp/staff/ikeda/

    • Related Report
      2018 Research-status Report 2017 Research-status Report
  • [Remarks] 京都大学大学院総合生存学館 池田データサイエンス研究室

    • URL

      http://ikeda.gsais.kyoto-u.ac.jp/index.html

    • Related Report
      2018 Research-status Report 2017 Research-status Report

URL: 

Published: 2017-07-21   Modified: 2022-12-28  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi