2023-present, Professor, Kanagawa University
2023-present, Specially Appointed Professor, Hitotsubashi University
2012-2023, Professor, Hitotsubashi University
2005-2012, Professor, Yokohama National University
2002-2005, Associate Professor, Yokohama National University
1999-2002, Assistant Professor, University of Tsukuba
1988-1999, Economist, Bank of Japan
Ph.D. 1997, Economics, Stanford University
M.S. 1988, Engineering, The University of Tokyo
B.S. 1986, Engineering, The University of Tokyo
A Shapley Value Representation of Potential Games, Games and Economic Behavior 31 (2000), 121-135.
Robust Equilibria of Potential Games, Econometrica 69 (2001), 1373-1380.
Best Response Equivalence (with Stephen Morris), Games and Economic Behavior 49 (2004), 260-287.
Generalized Potentials and Robust Sets of Equilibria (with Stephen Morris), Journal of Economic Theory 124 (2005), 45-78.
Incomplete Information Games with Multiple Priors (with Atsushi Kajii), Japanese Economic Review 56 (2005), 332-351.
Equivalence of the Dempster-Shafer Rule and the Maximum Likelihood Rule Implies Convexity (with Atsushi Kajii), Economics Bulletin 4-10 (2005), 1-6.
Agreeable Bets with Multiple Priors (with Atsushi Kajii), Journal of Economic Theory 128 (2006), 299-305.
Correlated Quantal Responses and Equilibrium Selection, Games and Economic Behavior 57 (2006), 361-369.
A Note on Discrete Convexity and Local Optimality, Japan Journal of Industrial and Applied Mathematics 23 (2006), 21-29.
Cominimum Additive Operators (with Atsushi Kajii and Hiroyuki Kojima), Journal of Mathematical Economics 43 (2007), 218-230.
Discrete Concavity for Potential Games, International Game Theory Review 10 (2008), 137-143.
Correlated Equilibrium and Concave Games, International Journal of Game Theory 37 (2008), 1-13.
Interim Efficient Allocations under Uncertainty (with Atsushi Kajii), Journal of Economic Theory 144 (2009), 337-353.
Coextrema Additive Operators (with Atsushi Kajii and Hiroyuki Kojima), in: S. K. Neogy, A. K. Das and R. B. Bapat, Editors, Modeling, Computation and Optimization, World Scientific (2009), pp. 73-95.
Bayesian Potentials and Information Structures: Team Decision Problems Revisited, International Journal of Economic Theory 5 (2009), 271-291. This article is available online at Blackwell Synergy (www.blackwell-synergy.com).
The Ambiguity Premium vs. the Risk Premium under Limited Market Participation, Review of Finance 15 (2011), 245-275.
The Myerson Value for Complete Coalition Structures (with Atsushi Kajii and Hiroyuki Kojima), Mathematical Methods of Operations Research 74 (2011), 427-443.
Effects of Symmetry on Globalizing Separated Monopolies to a Nash-Cournot Oligopoly (with Hisao Kameda), International Game Theory Review 14 (2012), DOI: 10.1142/S0219198912500090.
Radner's Theorem on Teams and Games with a Continuum of Players (with Yasunori Yoshizawa), Economics Bulletin 33-1 (2013), 72-77.
The Social Value of Public Information with Convex Costs of Information Acquisition, Economics Letters 125 (2014), 249-252.
Characterizing Social Value of Information (with Yasunori Yoshizawa), Journal of Economic Theory 158 (2015), 507-535. Online appendix
Bayesian Nash Equilibrium and Variational Inequalities, Journal of Mathematical Economics 63 (2016), 139-146.
The Lucas Imperfect Information Model with Imperfect Common Knowledge, Japanese Economic Review 71 (2020), 85-100.
Imprecise Information and Second-Order Beliefs, Communications in Economics and Mathematical Sciences 1 (2022), 67-86.