Tetsuro Kobayashi

Last updated: Mar 14, 2014 at 08:36
Tetsuro Kobayashi
National Institute of Informatics
Information and Society Research Division
Job title
Assistant Professor
Ph.D (Social Psychology; University of Tokyo)


Tetsuro Kobayashi is an assistant professor in National Institute of Informatics, Japan. He received his Ph. D. from the University of Tokyo for his study of social consequences of the Internet use in Japan. His research area covers social network theory, social capital theory, and computer-mediated communication. He published his papers in journals such as Information, Communication & Society, AI & Society, Japanese Journal of Social Psychology.

Research Areas


Academic & Professional Experience

Feb 2012
Feb 2014
Visiting Scholar, Stanford University, Department of Communication,
Nov 2011
Associate Professor, National Institute of Informatics, Information and Society Research Division
Jan 2011
Mar 2011
Visiting Scholar, Stanford University, Department of Communication,
Oct 2010
Dec 2010
Visiting Scholar, Rutgers University, School of Communication and Information,
Apr 2006
Mar 2007
Research fellow(DC2), Japan Society for the Promotion of Science

Awards & Honors

Feb 2010
Year 2009 special award for thesis "Future Vision of Image Information Media", The Institute of Image Information and Television Engineers
Winner: Kobayash, T.
Sep 2007
Year 2007 encouraged paper award (joint research by Kobayashi, T. & Ikeda, K.), The Japanese Society of Social Psychology
Winner: Kobayashi, T. & Ikeda, K.
Nov 2006
The 4th Yoshida Hideo award for financially supported research, second award (joint research by Miyata, K., Ikeda, K., Kim, Z., Shigemasu, E. & Kobayashi, T.), Yoshida Hideo Memorial Foundation
Winner: Miyata, K., Ikeda, K., Kim, Z., Shigemasu, E., & Kobayashi, T.
Sep 2006
Year 2006 encouraged paper award (joint research by Shimura, M., Kobayashi, T. & Murakami, F.), The Japanese Society of Social Psychology
Winner: Shimura, M., Kobayashi, T. & Murakami, F.
May 2004
The 20th anniversary memorial thesis prize (joint research by Kobayashi, T. & Ikeda, K.), The Japan Society of Information and Communication Research
Winner: Kobayashi, T. & Ikeda, K.

Teaching Experience


Social contribution activity

<Journal Review> Journal of Communication, Human Communication Research, Political Communication, Political Behavior, Journal of Computer-Mediated Communication, Information, Communication & Society(iCS), Social Science Computer Review, Mobile Media & Communication, Asian Journal of Social Psychology, Journal of Information Science, Information Processing & Management, Chinese Journal of Communication

Published Papers

The knowledge leveling effect of portal sites
Kobayashi, T. & Inamasu, K.
Communication Research   (forthcoming)    [Refereed]
Kobayashi, T. & Boase, J.
Journal of Computer-Mediated Communication   (online first)    Feb 2014   [Refereed]
Iyengar, S., Jackman, S., Messing, S., Valentino, N., Aalberg, T., Duch, R., Hahn, K. S., Soroka, S., Harell, A., & Kobayashi, T.
Public Opinion Quarterly   77(3) 641-665   Sep 2013   [Refereed]
Modeling deposit-withdrawal behavior with risk tolerance
Takemura, T., Kozu, T., & Kobayashi, T.
Journal of Management Policy and Practice   13(5) 116-127   Dec 2012   [Refereed]
Boase, J., & Kobayashi, T
China Media Research   8(4) 90-98   Oct 2012   [Refereed]
Kobayashi, T. & Boase, J.
Communication Methods and Measures   2(6) 126-143   Jun 2012   [Refereed]
Propensity score adjustment for internet surveys of voting behavior: A case in Japan
Kobayashi, T. & Hoshino, T.
Japanese Journal of Electoral Studies   27(2) 104-117   Dec 2011   [Refereed]
Recreation and participation: Testing the political impact of social interaction
Ikeda, K., Kobayashi, T., & Richey, S.
Social Science Quarterly   93(2) 464-481   Apr 2012   [Refereed]
An automatic question generation method for a local councilor search system
Kimura, Y., Shibuki, H., Ototake, H., Kobayashi, T., & Mori, T.
Transactions of the Japanese Society for Artificial Intelligence   26(5) 580-593   Jul 2011   [Refereed]
Political communication in the Internet age: The trend and prospect of media effects research
Kobayashi, T. & Inamasu, K.
Japanese Journal of Electoral Studies   27(1) 85-100   Jun 2011

Books etc

Knowledge gap. (In) Gianpietro Mazzoleni (Ed.) The International Encyclopedia of Political Communication
Kobayashi, T. (Part:Contributor)
Selective exposure. (In) Gianpietro Mazzoleni (Ed.) The International Encyclopedia of Political Communication, Wiley-Blackwell.
Kobayashi, T. (Part:Contributor)
The effects of similarities to previous buyers on trust and intention to buy from e-commerce stores: An experimental study based on the SVS model. In S. Uesugi (Ed.) IT enabled services.
Kobayashi, T. & Okada, H. (Part:Contributor)
Springer, Pp. 19-38.   Jan 2013   ISBN:978-3-7091-1425-4
Cyber behavior and social capital. In Z. Yan (Ed.). Encyclopedia of Cyber Behavior.
Kobayashi, T. (Part:Contributor)
IGI Global: Hershey, PA. Pp. 1063-1073.   Mar 2012   
ICTs supporting tolerant society: Social psychology in the loosely bridging Internet age [Japanese]
Kobayashi, T.
Taga Shuppan (single authored)   Mar 2010   ISBN:9784811575513 C1036
"Reputation", "Digital divide" (In) The Japanese Society of Social Psychology (Eds.) Social Psychology Dictionary. [Japanese]
Kobayashi, T.
Maruzen, Pp. 426-427, 440-441. (coauthored)   Jun 2009   ISBN:978621081075
Local community and Internet. (In) Miura, A., Morio, H. & Kawaura, Y. (Eds.) The Frontier of Internet Psychology.  [Japanese]
Kobayashi, T.
Seishin Shobo, Pp. 218-250. (coauthored)   Feb 2009   ISBN:9784414301694
Making democracy work via the functioning of heterogeneous personal networks: An empirical analysis based on a Japanese election study. (In) Ray-May Hsung, Nan Lin, & Ronald Breiger (Eds.) Contexts of Social Capital: Social Networks in Markets, Communitie
Ikeda, K. & Kobayashi, T.
Taylor & Francis, Pp.72-90. (coauthored)   Dec 2008   ISBN:9780415411172
The Internet, social capital, civic engagement, and gender in Japan. (In) Nan Lin and Bonnie H. Erickson (Eds.) Social capital: An international research program.
Miyata,K., Ikeda, K., & Kobayashi, T.
Oxford University Press, Pp.206-233. (coauthored)   May 2008   ISBN:0199234388
Cluster analysis (In) Ishiguro, I. (Ed.) Analysis of Social Survey Data using Stata. [Japanese]
Kobayashi, T.
Kitaoji Shobo, Pp. 119-132. (coauthored)   Apr 2008   ISBN:4762826022

Conference Activities & Talks

Tweets that matter: Evidence from a randomized field experiment in Japan
Kobayashi, T. & Ichifuji, Y.
Southern Political Science Association   11 Jan 2014   
Immigrants and images: How stereotypes and social contact shape Japanese views of China and South Korea
Collet, C. & Kobayashi, T.
2103 Asian Network for Public Opinion Research (ANPOR) Annual Conference   22 Nov 2013   
Who's calling at this ungodly hour? An investigation of the interplay between time of day, type of social ties, and cognitive tie strength
Lin, C., Boase, J., & Kobayashi, T.
International Network for Social Network Analysis Conference. Xi'an, China.   14 Jul 2013   
Developing bridging social capital using smartphones
Kobayashi, T., Boase, J., Suzuki, T., & Suzuki, T.
International Communication Association (ICA) annual conference, Researching the practices, functions, and effects of the new media in Asian politics pre-conference workshop, London, June 17, 2013 [査読あり]   17 Jun 2013   
Dividing the medium: The implications of mobile voice calling and texting for network diversity.
Boase, J., Mo, G.Y., & Kobayashi, T.
The Annual Congress of the Humanities and Social Sciences.   Jun 2013   

Research Grants & Projects

Formation of social capital through the maintainance and re-activation of "weak ties" using smartphones
Japan Society for the Promotion of Science: Year 2009-2010 Grants-in-Aid for Scientific Research for Challenging Exploratory Research <KAKENHI>
Project Year: Apr 2011 - Mar 2012    Investigator(s): (PI) Kobayashi, T.
Social psychological research on reputation circulation through the Internet and social capital
Japan Society for the Promotion of Science: Year 2009-2010 Grants-in-Aid for Scientific Research for Young Scientists (B) <KAKENHI>
Project Year: Apr 2009 - Mar 2011    Investigator(s): (PI) Kobayashi, T.
Empirical research on ICT use in political behavior
The Okawa Foundation for Information and Telecommunications: Year 2009, Humanities and sociology
Project Year: Apr 2009 - Mar 2010    Investigator(s): (PI) Kobayashi, T.
Research on social consequences of ICTs use on multi-layered social capital
Japan Society for the Promotion of Science: Year 2007-2008 Grant-in-Aid for Scientific Research for Young Scientists Start-up
Project Year: Apr 2007 - Mar 2009    Investigator(s): (PI) Kobayashi, T.
Social consequences of the Internet use: Social capital perspective
Japan Society for the Promotion of Science: Year 2006 Grant-in-Aid for Scientific Research, Research Fellowship for Young Scientist
Project Year: Apr 2006 - Mar 2007    Investigator(s): (PI) Kobayashi, T.