・“Agglomeration due to the imperfect information revisited,” CSIS Discussion Paper, No. 108 (2011).

・“Directional imbalance in transport prices and economic geography,” Journal of Urban Economics, 69 (2011), 92-102.

・“On the concept of a stable equilibrium in economic geography,” mimeo. (2009).

・“Income Distribution and the Land Market for Residential Use: ‘Quantity Premium’ Revisited,” mimeo. (2008).

・“Is the Transport Sector Too Large? Welfare Analysis of the Trade Model with a Transport Sector,” CSIS Discussion Paper, No. 92 (2008).

・“Asymmetric Transport Costs and Economic Geography,” CSIS Discussion Paper, No. 87 (2007).

・“Trade and Gains from Trade at the Extensive and at the Intensive Margins,” with Kristian Behrens, CSIS Discussion Paper, No. 85 (2007).

・"Spatial Competition of Governments in the Investment on Public Facilities," in Public Facilities Planning, L. Kiminami, K. Button and P. Nijkamp (eds.) (2006), 75-108. Edward Elgar, Chelthenham.

・“Economic Geography and Endogenous Determination of Transportation Technology,” Journal of Urban Economics, 60 (2005), 498-518.

・“Spatial Competition of Governments in the Investment of Public Facilities,” Regional Science and Urban Economics, 34 (2004), 455-488.

・“International Trade and Inefficiency in the Location of Production,” Journal of Japanese and International Economies, 17 (2003), 134-152.

・“Lock-in Effects of Transportation Technology and Economic Geography,” mimeo. (2002).

・“On the Effect of the Spatial Distribution of Economic Activities on the Transportaiton mode,” mimeo. (2001).

・“On the Welfare Effect of Import Tariff within the Economic Union,” Japanese Economic Review, 50 (1999), 291-308.

・“On the Optimal Policy of Infrastructure Provision across Regions,” Regional Science and Urban Economics, 28 (1998), 213-235.

・“Self-Defeating Regional Concentration,” with Kiminori Matsuyama. Review of Economic Studies, 65 (1998), 211-234.

・“Labor Mobility and Regional Allocation of Infrastructure Investment,” in Development Strategy from Regional Perspectives, K. Ohno and N. Hamaguchi (eds.) (1998), 89-118. Institute of Developing Economies.

・“On the Effect of Trade Liberalization upon Collusion,” Keio Economic Studies, Vol. 34, No. 2 (1997), 33-50.

・“Deindustrialization Caused by Dynamic Comparative Advantage,”Working Papers, 65 (1996), College of Arts and Sciences, University of Tokyo.

・“Role of Urban System in Industrialization: The Case of Europe,” Shakai-Kagaku-Kiyou, 45 (1996), 77-95, College of Arts and Sciences, University of Tokyo.

・“International Trade and "Bad" Regional Concentration,” Working Papers, 54 (1995), College of Arts and Sciences, University of Tokyo.

・“Unified Treatment of the Segment and the Circular Market Models,” with Andre de Palma, in Does Economic Space Matter? eds. by Hiroshi Ohta and Jacques F. Thisse, St. Martin's Press (1993).