An Empirical Study on Structural Analysis of Keiretsu using 3-Dimensional Spatial Graph Theory

• Project/Area Number: 24510217
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Social systems engineering/Safety system
• Research Institution: Hiroshima University (2014); Ube National College of Technology (2012-2013)
• Principal Investigator: ITO TAKAO 広島大学, 工学(系)研究科(研究院), 特任教授 (00280264)
• Co-Investigator(Kenkyū-buntansha): SAKAMOTO Makoto 宮崎大学, 工学部, 准教授 (50196101) ; IKEDA Satoshi 宮崎大学, 工学部, 准教授 (70282796)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000); Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2012: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
• Keywords: ネットワーク / DEC空間モデル / Network-Based DEA / 効率基準の平方値 / 国際情報交換

Outline of Final Research Achievements

In order to identify the behaviors of membership companies in a specific group, data of transactions and cross-shareholdings of Mazda's Yokokai from 1986 through 2007 have been collected in this study. Not only centrality, influence, effective size and other network indexes, but also the Euclidean distances in 3-dimensional space, the linkage between individual companies and their strategic behaviors, the changing trend of strategic behaviors of the individual companies and their corporate performance have been analyzed. Specifically, as typical spatial graph model, the model of DEC and IDE have been developed, and sensitivity analysis of individual companies have been performed. The relationship between the Euclidean distance among all membership companies in 3-dimension space and their corporate performance have been elucidated. Furthermore, as the index of IKIOI (momentum), accelerated velocity using limited cycle theory has been proposed and tested in this study.

Research Products

• [Journal Article] A Comparative Study of Inter-firm Transactional Relationship between Kyohokai and Yokokai (2014)
  • Author(s): T. Ito, M. Sakamoto, S. Ikeda, R. Mahta, and Y. Uchida
  • Journal Title: Journal of Robotics, networking and Artificial Life, Atlantis Press Volume: Volume 1, Issue 2 Pages: 179-183
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Examining Inter-firm Relationships Using Network-Based DEA: A Case Study of Mazda Yokokai (2014)
  • Author(s): T. Ito, M. Sakamoto, R. Mehta, and S. Ikeda
  • Journal Title: International Journal of Mathematical Models and Methods in Applied Sciences Volume: Volume 8 Pages: 516-521
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] オープン・イノベーションにおける情報システムマネジメントの役割に関する予備的分析 (2014)
  • Author(s): 松野成悟、田川晋也、内田保雄、伊藤孝夫
  • Journal Title: 生産管理論文誌, 日本生産管理学会 Volume: Volume 21, No.1 Pages: 65-70
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Some Accepting Powers of Bottom-Up Pyramid Cellular Acceptors with n-dimensional Layers (2014)
  • Author(s): Makoto Sakamoto, Makoto Nagatomo, Tatsuma Kurogi, Satoshi Ikeda, Masahiro Yokomichi and Hiroshi Furutani, Takao Ito, Yasuo Uchida, and Tsunehiro Yoshinaga
  • Journal Title: Journal of Robotics, Networking and Artificial Life, Atlantis Press Volume: Volume 1, Issue 2 Pages: 189-193
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Homogeneous Systolic Pyramid Automata with n-Dimensional Layers (2014)
  • Author(s): Makoto Sakamoto, Makoto Nagatomo, Tatsuma Kurogi, Satoshi Ikeda, Masahiro Yokomichi and Hiroshi Furutani, Takao Ito, Yasuo Uchida, and Tsunehiro Yoshinaga
  • Journal Title: Journal of Robotics, Networking and Artificial Life, Atlantis Press Volume: Volume 1, Issue 2 Pages: 203-206
  • NAID: 130007004767
  • Acknowledgement Compliant
• [Journal Article] Remarks on Recognizability of Four-Dimensional Topological Components (2014)
  • Author(s): Makoto Nagatomo, Makoto Sakamoto*, Tatsuma Kurogi, Satoshi Ikeda, Masahiro Yokomichi and Hiroshi Furutani, Takao Ito, Yasuo Uchida, and Tsunehiro Yoshinaga
  • Journal Title: Journal of Robotics, Networking and Artificial Life, Atlantis Press Volume: Volume 1, Issue 2 Pages: 212-215
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] A Relationship Analysis between Green Supply Chain Management and its Performance: A path Analytical Model (2014)
  • Author(s): Seigo Matsuno, Shin-ya Tagawa, Yasuo Uchida, Takao Ito
  • Journal Title: Journal of Robotics, Networking and Artificial Life, Atlantis Press Volume: Volume 1, Issue 2 Pages: 145-150
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] An Emprical Examination of Inter-firm Capital Relationships in Mazda's Yokokai using the IDE Spatial Model (2014)
  • Author(s): Makoto Sakamoto, Satoshi Ikeda, Takao Ito, Rajiv Mehta, Seigo Matsuno, Shinya Tagawa, Victor D. Berdonosov
  • Journal Title: An Emprical Examination of Inter-firm Capital Relationships in Mazda's Yokokai using the IDE Spatial Model, Journal of Robotics, Networking and Artificial Life, Atlantis Press Volume: Volume 1, Issue 2 Pages: 150-154
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] A Study of Open Source Cloud System for small and Medium Enterprise (2014)
  • Author(s): Yaso Uchida, Seigo Matsuno, Masayoshi Hasama, Takao Ito, Makoto Sakamoto
  • Journal Title: A Study of Open Source Cloud System for small and Medium Enterprise, Journal of Robotics, Networking and Artificial Life, Atlantis Press Volume: Volume 1, Issue 2 Pages: 155-159
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Hierarchy Based on Neighborhood Template about k-Neighborhood Template A-Type Three-Dimensional Bounded Cellular Acceptor - (2014)
  • Author(s): Makoto Sakamoto, Makoto Nagatomo, Tuo Zhang, Xiaoyang Feng, Tatsuma Kurogi, Satoshi Ikeda, Masahiro Yokomichi, Hiroshi Furutani, Takao Ito, Yasuo Uchida, Tsunehiro Yoshinaga
  • Journal Title: Journal of Robotics, Networking and Artificial Life, Atlantis Press Volume: Volume 1, Issue 1 Pages: 85-89
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Hierarchy Based on Configuration-Reader about k-Neighborhood Template A-Type Three-Dimensional Bounded Cellular Acceptor - (2014)
  • Author(s): Makoto Sakamoto, Makoto Nagatomo, Tuo Zhang, Xiaoyang Feng, Tatsuma Kurogi, Satoshi Ikeda, Masahiro Yokomichi, Hiroshi Furutani, Takao Ito, Yasuo Uchida, Tsunehiro Yoshinaga
  • Journal Title: Journal of Robotics, Networking and Artificial Life, Atlantis Press Volume: Volume 1, Issue 1 Pages: 80-84
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Concerning Parameterization of Artificial Systems "Growth-curve" (S-curve) (2014)
  • Author(s): V. D. Berdonosov, Takao Ito
  • Journal Title: Advances in Information Sciences and Service Sciences, AICIT Volume: Vol. 6, No.1 Pages: 24-34
  • Peer Reviewed
• [Journal Article] Outcome-and behavior-based performance assessment of sales managers: The influence of hierarchical level (2013)
  • Author(s): Rajiv Mehta, Ralph E. Anderson, Takao Ito, and Joana Mazur
  • Journal Title: International Journal of Management and Economics, Warsaw School of Economics Volume: 36 Pages: 51-69
  • Peer Reviewed
• [Journal Article] Determinants and consequences of cooperation in international strategic distribution channel alliances (2013)
  • Author(s): Rajiv Mehta, Ralph E. Anderson, Takao Ito, and Joana Mazur
  • Journal Title: Contemporary Management Research, Academy of Taiwan Information Systems Research Volume: Vol 9, No.4 Pages: 363-369
  • Peer Reviewed
• [Journal Article] Hierarchies Based on the Number of Cooperating Systems of Finite Automata on Four-Dimensional Input Tapes (2012)
  • Author(s): Makoto Sakamoto, Yasuo Uchida, Makoto Nagatomo, Takao Ito,Tsunehiro Yoshinaga,Satoshi Ikeda, Masahiro Yokomichi, and Hiroshi Furutani
  • Journal Title: World Academy of Science, Volume: Vol.72 Pages: 1068-1073
  • Peer Reviewed
• [Journal Article] Outcome-and behavior-based performance assessment of sales managers: The influence of hierarchical level (2012)
  • Author(s): R. Mehta, R. E. Anderson, T. Ito, and J. Mazur
  • Journal Title: International Journal of Management and Economics Volume: No. 36 Pages: 51-69
  • Peer Reviewed
• [Journal Article] Determinants and consequences of cooperation in international strategic distribution channel alliances (2012)
  • Author(s): R. Mehta, R. E. Anderson, T. Ito, and J. Mazur
  • Journal Title: Contemporary Management Research Volume: 不明
  • Peer Reviewed
• [Presentation] A Mathematical Model of Hierarchical Organization (2015)
  • Author(s): S.Ikeda, T.Ito, M.Sakamoto
  • Organizer: Proceedings of the international conference on Pure Mathematics and Applied Mathematics (PM-AM2015), pp.423-432, ,March 15-17, 2015
  • Place of Presentation: Vienna, Austria
  • Year and Date: 2015-03-15 – 2015-03-17
  • Invited
• [Presentation] Inter-firm Transactional Relationship in Yokokai using IDE Spatial Model: An Empirical Investigation (2015)
  • Author(s): Takao.Ito, Rajiv.Mehta, Tutomu Ito, Makoto Sakamoto, Satoshi Ikeda, Seigo Matuno, Yasuo Uchida
  • Organizer: Proceedings of the international conference on Pure Mathematics and Applied Mathematics (PM-AM2015), pp.32-36, Vienna,Austria,March 15-17, 2015
  • Place of Presentation: Vienna, Austria
  • Year and Date: 2015-03-15 – 2015-03-17
  • Invited
• [Presentation] 企業における情報システムの内外製判断を規定する要因に関する実証分析 (2015)
  • Author(s): 松野成悟，田川晋也，内田保雄，伊藤孝夫
  • Organizer: 日本生産管理学会第41回全国大会講演論文集149-152頁，2015（平成27）年3月
  • Place of Presentation: 福岡市（福岡工業大学）
  • Year and Date: 2015-03-13 – 2015-03-15
• [Presentation] Sufficient spaces for seven-way four-dimensional Turing machines to simulate four-dimensional one-marker automata (2015)
  • Author(s): M. Nagatomo, M. Sakamoto, H. Susaki, T. Zhang, S. Ikeda, and H. Furutani, T. Ito, Y. Uchida, T. Yoshinaga
  • Organizer: Proceedings of The 2015 International Conference on ARTIFICIAL LIFE AND ROBOTICS, pp. 340-343, Jan. 10-12, 2015
  • Place of Presentation: Oita, Japan
  • Year and Date: 2015-01-10 – 2015-01-17
• [Presentation] Some properties of k-neighborhood Template A-type two-dimensional bounded cellular acceptors (2015)
  • Author(s): M. Sakamoto, M. Nagatomo, H. Susaki, T. Zhang, S. Ikeda and H. Furutani, T. Ito, Y. Uchida, T. Yoshinaga
  • Organizer: Proceedings of The 2015 International Conference on ARTIFICIAL LIFE AND ROBOTICS, pp. 344-347, Jan. 10-12, 2015
  • Place of Presentation: Oita, Japan
  • Year and Date: 2015-01-10 – 2015-01-17
• [Presentation] Perfect Analysis in miniature Othello (2015)
  • Author(s): Yuki Takeshita, Satoshi Ikeda, Makoto Sakamoto, Takao Ito
  • Organizer: Proceedings of The 2015 International Conference on ARTIFICIAL LIFE AND ROBOTICS, pp. 348-351, Jan. 10-12, 2015
  • Place of Presentation: Oita, Japan
  • Year and Date: 2015-01-10 – 2015-01-17
• [Presentation] A proposal for teaching programming through the Five-Step Method (2015)
  • Author(s): Yasuo Uchida, Seigo Matsuno, Takao Ito, Makoto Sakamoto
  • Organizer: Proceedings of The 2015 International Conference on ARTIFICIAL LIFE AND ROBOTICS, pp. 352-355, Jan. 10-12, 2015
  • Place of Presentation: Oita, Japan
  • Year and Date: 2015-01-10 – 2015-01-17
• [Presentation] An Empirical Research on Inter-firm Capital Relationship in Yokokai Using IDE Spatial Model (2015)
  • Author(s): Takao Ito, Makoto Sakamoto, Satoshi Ikeda, Rajiv Mehta, and Tsutomu Ito
  • Organizer: Proceedings of The 2015 International Conference on ARTIFICIAL LIFE AND ROBOTICS, pp. 360-363, Jan. 10-12, 2015
  • Place of Presentation: Oita, Japan
  • Year and Date: 2015-01-10 – 2015-01-12
• [Presentation] 経営戦略における「勢い」の実証研究－自動車関連企業の事例分析－ (2014)
  • Author(s): 坂本眞人・池田諭・伊藤孝夫・松野成悟・内田保雄
  • Organizer: 日本生産管理学会第40回全国大会講演論文集（名古屋工業大学），249-252頁
  • Place of Presentation: 名古屋工業大学
  • Year and Date: 2014-09-05 – 2014-09-07
• [Presentation] オープン・イノベーションにおける情報システムマネジメントに関する予備的考察 (2014)
  • Author(s): 松野成悟・田川晋也・内田保雄・伊藤孝夫
  • Organizer: 日本生産管理学会第40回全国大会講演論文集（名古屋工業大学），131-134頁
  • Place of Presentation: 名古屋工業大学
  • Year and Date: 2014-09-05 – 2014-09-07
• [Presentation] Handicap of Othello Game (2014)
  • Author(s): Yusuke Kato Satoshi Ikeda Takao Ito Makoto Sakamoto
  • Organizer: Proceedings of The 2014 International Conference on ARTIFICIAL LIFE AND ROBOTICS, pp. 340-342, Jan. 11-13, 2014
  • Place of Presentation: Oita, Japan
• [Presentation] Hierarchy Based on Configuration-Reader about k-Neighborhood Template A-Type Three-Dimensional Bounded Cellular Acceptor (2014)
  • Author(s): M. SAKAMOTO, T. ZHANG, T. KUROGI, M. NAGATOMO, X. FENG, Y. UCHIDA, T. ITO, T. YOSHINAGA, S. IKEDA, M. YOKOMICHI, and H. FURUTANI
  • Organizer: Proceedings of The 2014 International Conference on ARTIFICIAL LIFE AND ROBOTICS, pp. 336-339
  • Place of Presentation: Oita, Japan
• [Presentation] Hierarchy Based on Neighborhood Template about k-Neighborhood Template A-Type Three-Dimensional Bounded Cellular Acceptor (2014)
  • Author(s): Makoto SAKAMOTO, Makoto NAGATOMO, Xiaoyang FENG, Tatsuma KUROGI, Tuo ZHANG, Takao ITO, Yasuo UCHIDA, Tsunehiro YOSHINAGA, Satoshi IKEDA, Masahiro YOKOMICHI, and Hiroshi FURUTANI
  • Organizer: Proceedings of The 2014 International Conference on ARTIFICIAL LIFE AND ROBOTICS, pp. 332-335, Jan. 11-13, 2014, Oita
  • Place of Presentation: Oita, Japan
• [Presentation] A Study of Open Source Cloud System for Small and Medium Enterprise (2014)
  • Author(s): Y. Uchida, S. Matsuno, T. Ito, M. Hasama, and M. Sakamoto
  • Organizer: Proceedings of The 2014 International Conference on ARTIFICIAL LIFE AND ROBOTICS, pp. 300-303
  • Place of Presentation: Oita, Japan
• [Presentation] A Path Analytic Model and Measurement of the Relationships between Green Supply Chain Management Implementation and Corporate Performance (2014)
  • Author(s): S. Matsuno*, M. Hasama, Y. Uchida, and T. Ito
  • Organizer: Proceedings of The 2014 International Conference on ARTIFICIAL LIFE AND ROBOTICS, pp. 296-299
  • Place of Presentation: Oita, Japan
• [Presentation] A Comparative Study of Inter-firm Transactional Relationship between Kyohokai and Yokokai (2014)
  • Author(s): M. Sakamoto, M. Hasama, T. Ito, Y. Uchida, R. Mehta, Y. Park, and S. Ikeda
  • Organizer: Proceedings of The 2014 International Conference on ARTIFICIAL LIFE AND ROBOTICS, pp. 292-295
  • Place of Presentation: Oita, Japan
• [Presentation] An Empirical Examination of Inter-firm Capital Relationships in Mazda’s Yokokai using the IDE Spatial Model (2014)
  • Author(s): M. Sakamoto, S. Tagawa, T. Ito, S. Matsuno, R. Mehta, V. Berdonosov, and S. Ikeda
  • Organizer: Proceedings of The 2014 International Conference on ARTIFICIAL LIFE AND ROBOTICS, pp. 288-291
  • Place of Presentation: Oita, Japan
• [Presentation] Engineering Analysis of Organizational Structures using Graph Theory (2014)
  • Author(s): Takao Ito
  • Organizer: Beijing University of Technology
  • Place of Presentation: Beijing , China
  • Invited
• [Presentation] A Research on Inter-Firms Relationship using Network-Based DEA -A Case Study of Mazda Yokokai (2013)
  • Author(s): Takao Ito, Seigo Matsuno, Rajiv Mehta, Makoto Sakamoto, Satoshi Ikeda
  • Organizer: Proceedings of the 2nd International Conference on Integrated Systems and Management for Energy, Development, Environment, and Health (ISMAEDEH '13), pp. 92-97
  • Place of Presentation: Iwate prefectural University, Morioka City, Iwate, Japan
• [Presentation] An Analysis of Inter-firms Distances and Corporate Performance using DEC Spatial Model (2013)
  • Author(s): Takao Ito, Seigo Matsuno, Rajiv Mehta, Makoto Sakamoto, Satoshi Ikeda
  • Organizer: Proceedings of the 2nd International Conference on Integrated Systems and Management for Energy, Development, Environment, and Health (ISMAEDEH '13), pp. 80-85, Morioka City, Iwate, Japan
  • Place of Presentation: Iwate prefectural University, Morioka City, Iwate, Japan
• [Presentation] k近傍A形3次元限定セル構造アクセプタ (2013)
  • Author(s): 張 拓・馮暁陽・黒木竜馬・坂本眞人・伊藤孝夫・内田保雄・義永常宏・池田諭・横道政裕・古谷博史
  • Organizer: 平成25年度電気関係学会九州支部連合大会（第66回連合大会）講演論文集（CD-ROM），413頁
  • Place of Presentation: 熊本大学
• [Presentation] 任意の3次元パターンの認識可能性について (2013)
  • Author(s): 馮暁陽・張拓・長友誠・坂本眞人・伊藤孝夫・内田保雄・義永常宏・池田諭・横道政裕・古谷博史
  • Organizer: 平成25年度電気関係学会九州支部連合大会（第66回連合大会）講演論文集（CD-ROM），414頁
  • Place of Presentation: 熊本大学
• [Presentation] An Analysis of Network Structure in Mazda’s Yokokai using the DEC Spatial Model (2013)
  • Author(s): T. Ito, S. Tagawa, S. Matsuno, Y. Uchida, M. Sakamoto, S. Ikeda, R. Mehta
  • Organizer: Proceedings of the 2013 International Conference on Business Administration, Marketing and Economics (BAME 2013), Recent Advances in Business Administration, Marketing and Economics, pp. 77-81
  • Place of Presentation: Venice, Italy
• [Presentation] k-Neighborhood Template A-Type Three-Dimensional Bounded Cellular Acceptor (2013)
  • Author(s): Makoto Sakamoto, Yasuo Uchida, Makoto Nagatomo, Tuo Zhang, Tatsuma Kurogi, Takao Ito, Tsunehiro Yoshinaga, Satoshi Ikeda, Masahiro Yokomichi, and Hiroshi Furutani
  • Organizer: Proceedings of The International Conference on Computer Science and Technology (ICCST 2013), pp.1590-1595
  • Place of Presentation: Bali, Indonesia
• [Presentation] Bottom-Up Pyramid Cellular Acceptors with n-dimensional Layers (2013)
  • Author(s): Makoto Sakamoto, Tatsuma Kurogi, Makoto Nagatomo, Takao Ito, Yasuo Uchida, Tsunehiro Yoshinaga, Satoshi Ikeda, Masahiro Yokomichi, and Hiroshi Furutani
  • Organizer: The Eighteenth International Symposium on Artificial Life and Robotics 2013
  • Place of Presentation: Daejeon Convention Center, Daejeon, Korea
• [Presentation] Homogeneous Systolic Pyramid Automata with n-Dimensional Layers (2013)
  • Author(s): Makoto Sakamoto, Takao Ito, Tatsuma Kurogi, Makoto Nagatomo, Yasuo Uchida, Tsunehiro Yoshinaga, Satoshi Ikeda, Masahiro Yokomichi, and Hiroshi Furutani
  • Organizer: The Eighteenth International Symposium on Artificial Life and Robotics 2013
  • Place of Presentation: Daejeon Convention Center, Daejeon, Korea
• [Presentation] Remarks on Recognizability of Four-Dimentuonal Topological Components (2013)
  • Author(s): Makoto Sakamoto, Makoto Nagatomo, Tatsuma Kurogi, Takao Ito, Yasuo Uchida, Tsunehiro Yoshinaga, Satoshi Ikeda, Masahiro Yokomichi, and Hiroshi Furutani
  • Organizer: The Eighteenth International Symposium on Artificial Life and Robotics 2013
  • Place of Presentation: Daejeon Convention Center, Daejeon, Korea
• [Presentation] An Analysis of Inter-firms Distances and Corporate Performance using DEC Spatial Mdeol (2013)
  • Author(s): Takao Ito, Seigo Matsuno, Rajiv Mehta, Makoto Sakamoto, Satoshi Ikeda
  • Organizer: The 2nd International Conference on Integrated Systems and Management for Energy, Development, Environment and Health
  • Place of Presentation: 岩手県民情報交流センター
• [Presentation] A Research on Inter-Firms Relationship using Network-Based DEA -A Case Study of Mazda Yokokai- (2013)
  • Author(s): Takao Ito, Shinya Tagawa, Rajiv Mehta, Makoto Sakamoto, Satoshi Ikeda
  • Organizer: The 2nd International Conference on Integrated Systems and Management for Energy, Development, Environment and Health
  • Place of Presentation: 岩手県民情報交流センター
• [Presentation] Measuring Efficiency of Firms in Yokokai using the IDCBI Spatial Model (2013)
  • Author(s): Takao Ito, Masayoshi Hasama, Rajiv Mehta, Makoto Sakamoto, Satoshi Ikeda
  • Organizer: The 2nd International Conference on Integrated Systems and Management for Energy, Development, Environment and Health
  • Place of Presentation: 岩手県民情報交流センター
• [Presentation] Determinants and consequences of cooperation in international strategic distribution channel alliances (2012)
  • Author(s): R. Mehta, T. Ito, J. Mazur, and R. E. Anderson
  • Organizer: Proceedings of 2012 International Conference on Marketing Studies (ICMS2012),
  • Place of Presentation: The Landmark Bangkok, Thailand
• [Presentation] Some basic issues in network analysis and its development (2012)
  • Author(s): Takao Ito
  • Organizer: 2012 The 3rd International Conference on Technology and Application of Internet of Things
  • Place of Presentation: 北京工商大学
  • Invited
• [Presentation] Influence, Trust and Trade in the Keiretsu of Toyota: A Centrality Analysis
  • Author(s): Takao Ito
  • Organizer: 九州大学大学院英語プログラム，経済工学リサーチワークショップ，九州大学大学院経済学研究科
  • Place of Presentation: 九州大学
  • Invited
• [Presentation] ネットワーク戦略の策定方法
  • Author(s): 伊藤孝夫
  • Organizer: 公益社団法人日本技術士会中国本部情報・経営工学部会講演会
  • Place of Presentation: 山口グランドホテル
  • Invited