Education

Career

Publications

• Ryohei Hisano, Taichi Kiwaki, "Zukai Daigaku Yonenkan No Data Science Ga 10 Jikan De Zaltuto Manaberu" (In Japanese), KADOKAWA, 2019
• Ryohei Hisano, Taichi Kiwaki, "Daigaku Yonenkan No Data Science Ga 10 Jikan De Zaltuto Manaberu" (In Japanese), KADOKAWA, 2018

Papers

• Wenning Zhang, Ryohei Hisano, Takaaki Ohnishi, Takayuki Mizuno, “Nondiagonal Mixture of Dirichlet Network Distributions for Analyzing a Stock Ownership Network”, Complex Networks & Their Applications IX, Volume 1, Proceedings of the Ninth International Conference on Complex Networks and Their Applications COMPLEX NETWORKS 2020, Book Series: Studies in Computational Intelligence, Editors: Prof. Rosa M. Benito, Springer International Publishing, https://10.1007/978-3-030-65347-7, 2021, Pages 75-86, 2021

• Ryohei Hisano, Hiroshi Iyetomi, Takayuki Mizuno, “Identifying the Hierarchical Influence Structure Behind Smart Sanctions Using Network Analysis”, In: Aref S. et al. (eds) Social Informatics. SocInfo 2020. Lecture Notes in Computer Science, vol 12467. Springer, Cham. https://doi.org/10.1007/978-3-030-60975-7_8, 2020, pp 95-107, 13 pages, 2020

• Ryohei Hisano, Didier Sornette, Takayuki Mizuno, “Prediction of ESG compliance using a heterogeneous information network”, J Big Data 7, 22 (2020). https://doi.org/10.1186/s40537-020-00295-9, 19 pages, 2020.
• Ryohei Hisano, “Learning Topic Models by Neighborhood Aggregation”, IJCAI 2019, Macao, China, Aug 10 -16, 2019, 8 pages, 2018.
• Ryohei Hisano, "Semi-supervised Graph Embedding Approach to Dynamic Link Prediction", Complenet 2018, Northeastern University, Boston, Match 4-8, 2018.
• Ryohei Hisano, Tsutomu Watanabe, Takayuki Mizuno, Takaaki Ohnishi, Didier Sornette, "The gradual evolution of buyer-seller networks and their role in aggregate fluctuations", Applied Network Science, 2017, Vol 2, 9.
• Ryohei Hisano, "A new approach to building the interindustry input-output table using block estimation techniques", 2016 IEEE International Conference on Big Data (Big Data), 5-8 Dec. 2016.
• Ryohei Hisano, Didier Sornette, Takayuki Mizuno, Takaaki Ohnishi, Tsutomu Watanabe, “High quality topic extraction from business news explains abnormal financial market volatility” , PLoS ONE, 2013, June, Vol 8, e64846
• Ryohei Hisano, Didier Sornette, “Challenges to the Assessment of Time-to-Proof of Mathematical Conjectures”, The Mathematical Intelligencer, June, 2013.
• Ryohei Hisano, Didier Sornette, Takayuki Mizuno, “Predicted and Verified Deviation from Zipf’s law in Ecology of Competing Products”, Physical Review E, 84, 026117, (2011).
• Ryohei Hisano, Takayuki Mizuno, “Sales distribution of consumer electronics”, Physica A 390, 309-318, (2011).

Others

Invited Talks

• “Analysis of structure of the Japanese law using text and network mining”, Network science 2021, Dec 12, 2021
  “Cognitive causal networks and COVID-19”, CARF BOJ Big data forum, Nov 9, 2020.
• “Social responsible investment using Economic knowledge graph”, 16th Text analytics symposium, Sep 10, 2020
• “Analysis of the Economic Watcher Survey using Machine Learning”, The Cabinet Office of Japan, January 31, 2018, Japan.
• Technology Session, Panelist, 5th Global Forum on Responsible Business Conduct, 29-30 June 2017, OECD, Paris, France.
• “Text Mining with Machine Learning”, Bank of Japan Machine Learning Seminar, February 16, 2017, Japan.
• “Analysis of index of industrial production with Machine Learning”, Bank of Japan Machine Learning Seminar, February 9, 2017, Japan.
• “Basics of Machine Learning”, Bank of Japan Machine Learning Seminar, February 6, 2017, Japan.
• “On the sales distribution of consumer electronics products”, 29th Econopysics Seminar, Tokyo Institute of Technology, May 29, 2010.

【Conferences】

• “Semi-supervised Graph Embedding Approach to Dynamic Link Prediction”, Ryohei Hisano, Complenet 2018, Northeastern University, Boston, Match 4-8, 2018.
• “A new approach to building the interindustry input-output table using block estimation techniques", Ryohei Hisano, 2016 IEEE International Conference on Big Data (Big Data), 5-8 Dec. 2016.
• “Predicting Link dissolution in the interfirm buyers-eller network”, Ryohei Hisano, 2016 Conference on Complex Systems, Beurs Van Berlage, Amsterdam, The Netherlands, 19-22 September 2016
• “Infinite Sparse Block Model with Text using 2DCRP”, The Research Institute of Economy, Trade and Industry Seminar, July 24, 2015.
• “Role of the interfirm buyer-seller network in aggregate fluctuation and the effect of link renewal”, The Research Institute of Economy, Trade and Industry Seminar, Jan 29, 2015.
• "Identification of network effect in the buyer-seller network", 8th International Conference on Computational and Financial Econometrics (CFE 2014), Dec 6, 2014.
• "Large scale empirical analysis of buyer-seller network and its role in the business cycle", Computationally intensive Methods in Statistics and Econometrics Satellite meeting of COMPSTAT 2014, Aug 23, 2014.
• “Mining social structures from hundred million business news”, ECCS 2012, Sep 3-7, 2012.
• “Birth-death proportional growth model and social dynamics”, W.E.H.I.A, 17th Annual Workshop on Economic Heterogeneous Interacting Agents, University of Pantheon-Assas, Paris II, July 21-23,　2012.
• “Birth-death proportional growth model and social dynamics”, W.E.H.I.A, 17th Annual Workshop on Economic Heterogeneous Interacting Agents, University of Pantheon-Assas, Paris II, July 21-23,　2012.
• “Deviation from Zipf’s law in ecology of competing products”, International Workshop on Coping with Crises in Complex Socio-Economic Systems, ETH Zürich, June 20-24, 2011.
• “Market share of household electrical appliances”, Complex’09, Surugadai Memorial Hall, Chuo University, Nov 4-7, 2009.
• “Sales distribution of consumer electronics”, Econophysics Colloquium 2009, Centro Ettore Maiorana Erice, Oct 25-31, 2009.