- METI (Ministry of Economy, Trade and Industry), White Paper on International Trade 2000 , (Chapter 1, Section 2, Table 1-2-25, Appended Notes AN 1.2.2. p.231)
- Tomoya Mori and Koji Nishikimi, " Self-Organization in the Spatial Economy: Size, Location and Specialization of Cities ,"Discussion Paper No. 532, Institute of Economic Research, Kyoto University, September 2001
- Tomoya Mori, Koji Nishikimi and Tony E. Smith, " Some Empirical Regularities of Spatial Economies : A Relationship between Industrial Location and City Size ," Discussion Paper No.551, Institute of Economic Research, Kyoto University, September 2002.
- Y. Kanemoto, T. Kitagawa, R. Kurima, H. Saito, and E. Shioji, " Is Tokyo too big?: An Application of the Henry George Theorem ," Presented at the 50th Annual North American Meeting of the Regional Science Association International, Philadelphia, November 2003.