

2008 
Toru Ishikawa, Hiromichi Fujiwara, Osamu Imai, Atsuyuki Okabe, eWayfinding with a GPSbased mobile navigation system: A comparison with maps and direct experiencef, gJournal of Environmental Psychologyh, Vol. 28, No., 1, pp7482 
2008 
Ino, Y., Oka, T., Nomura, K., Watanabe, T., Kawashima, S., Amano, T., Hayashi, Y., Okabe, A., Uehara, Y., Masuda, T., Takamatsu, J., Nakazawa, A., Ikeuchi, K., Endo, H., Fukuta, K., Akishinonomiya, F., eBreed differentiation among Japanese native chickens by specific skull features determined by direct measurements and computer vision techniquesf, gBritish Poultry Scienceh, Vol. 49, No., 3, pp273281 
2008 
Okabe, A., Sato, T., Furuta, T., Suzuki, A., eOkano, A., Generalized network Voronoi diagrams: Concepts, computational methods, and applicationsf, gInternational Journal of Geographical Information Science, June 2008, pp130 
2007 
Boots, B., Okabe, A., gLocal statistical spatial analysis: Inventory and prospecth, International Journal of Geographical Information Science, vol. 21, No. 34, MarchApril 2007, pp355375 

Okabe, A., Satoh, T., Furuta, T., Suzuki, A., Okano, K., "Generalized Network Voronoi Diagrams", IfGI prints 28 Geographic Information Science Fourth International Conference, GIScience 2006 Muenster, Germanay, September 2006 Extended Abstracts, pp137140 
2006 
Okabe, A., Okunuki, K. and Shiode, S., "The SANET Toolbox: New Methods for Network Spatial Analysis", Transactions in GIS, 10(4), pp535550 
2006 
Okabe, A., Okunuki, K. and Shiode, S., "SANET: A Toolbox for Spatial Analysis on a Network", Geographical Analysis, 38(1), pp5766 
2005 
Okabe, A., Satoh, T., "Uniform network transformation for points pattern analysis on a nonuniform network", Journal of Geographical Systems, Vol. 8, pp2537 
2004 
Spooner P.G., Lunt I.D., Okabe A. and Shiode S. "Spatial analysis of roadside Acacia populations on a road network using the network Kfunction", Landscape Ecology, 19(5), pp491499. 
2003 
Okabe, A. and Yoshikawa, T. "SAINF: A toolbox for analyzing the effect of pointlike, linelike and polygonlike infrastructural features on the distribution of pointlike noninfrastructural features", Journal of Geographical Systems, Vol.5, pp. 407413 
2002 
Okunuki, K. and Okabe, A., "Solving the HuffBased Competitive Location Model on a Network with LinkBased Demand", Annals of Operations Research, Vol.111, pp.239252 
2002 
Tagashira, N. and Okabe, A.,, "The Modifiable Areal Unit Problem in a Regression Model Whose Independent Variable is a Distance from a Predetermined Point", Geographical Analysis, Vol.34, No.1, pp.120 
2001 
Watanabe, T., Okabe, A., Izumi, T., Sadahiro, Y., "Analysis of the Effect of Land Use Patterns on the Anthropogenic Energy Discharged from Air Conditioning and Hot Water Supply Using a Modified CSU Mesoscale Model", GeoJournal, vol. 53, No. 4, pp.385390 
2001 
Satoh, T., Sadahiro, Y., Okabe, A., "A Computational Procedure for Joining Separate Map Sheets," GeoJournal, vol. 52, No. 3, pp.253262 
2001 
Okabe, A. and Yamada, I.., "The Kfunction method on a network and its computational implementation", Geographical Analysis, Vol.33, No.3 , pp.271290 
2001 
Okabe, A. and Okunuki, K., "A computational method for estimating the demand of retail stores on a street network and its implementation in GIS", Transactions in GIS, Vol.5, No.3, pp.209220 
2001 
Shiode, N. and Okabe, A., "A
computational method for optimizing the shape and location of a polygon on a
plane" 
2001 
Maniruzzaman, K.M., Okabe, A., Asami, Y., "GIS for Cyclone Disaster Management in Bangladesh" Geographical Environmental Modelling, vol. 5, no. 2, 123131 
2001 
Okabe, A. and Masuyama, A., "An exploratory method for qualitative trend curve analysis a robust method against low quality data" International Journal of Geographical Information Science, Vol.15, No.1, pp.6576 
2000 
Okabe, A. and Funamoto, S., "An exploratory method for detecting multilevel clumps in the distribution of points  a computational tool, VCM (variable clumping method)" Journal of Geographical Systems, Vo2., No.2, pp111120 
1998 
Ishikawa, T., Okabe, A., Sadahiro, Y. and Kakumoto, S., "An Experimental Analysis of the Perception of the Area of an Open Space Using 3D Stereo Dynamic Graphics", Environment and Behavior, Vo1. 30, No.2, 216234 
1997 
Okabe, A. and Sadahiro, Y., "Variation in Count Data Transferred form a Set of Irregular Zones to a Set of regular Zones through the PointInPolygon Method", International Journal of Geographical Information Science, Vol.11, No.1, pp.93106 
1997 
Okabe, A., Okunuki, K. and Suzuki, T., "A Computational Method for Optimizing the Hierarchy and Spatial Configuration of Successively Inclusive Facilities on a Continuous Plane", Location Science, Vol.5, No.4, pp255268 
1996 
Okabe, A. and Tagashira, N., "Spatial Aggregation Bias in a Regression Model Containing a Distance Variable", Geographical Systems, Vol.3, pp.7799 
1996 
Okabe, A. and Sadahiro, Y., "An Illusion of Spatial Hierarchy: Spatial Hierarchy in a Random Configuration", Environment and Planning A, Vol.28, pp.15331552 
1996 
Okabe, A. and Kitamura, M., "A Computational Method for Market Area Analysis on a Network", Geographical Analysis, Vol.28, No.4, pp.330349 
1996 
Okabe, A. and Miller, H., "Exact Computational Methods for Calculating Distances between Objects in Cartographic Data Base", Cartography and GIS, Vol.23, No.4, pp.180195 
1995 
Okabe, A., Yomono, H. and Kitamura, M., "Statistical Analysis of the Distribution of Points on a Network", Geographical Analysis, Vol.27, No. 2, pp.152175 
1994 
Okabe, A. and Sadahiro, Y., "A Statistical Method for Analyzing the Spatial Relationship between the Distribution of Activity Points and the Distribution of Activity Continuously Distributed over a Region", Geographical Analysis, Vol. 26, No. 2 (April), pp.152167 
1994 
Okabe, A., Boots, B. and Sugihara, K., "Nearest Neighborhood Operations with Generalized Voronoi Diagrams: A Review", International Journal of Geographical Information Systems, Vol. 8, No. 1, pp.4371 
1993 
Aoyagi, M. and Okabe, A., "Spatial Competition of Firms in a Bounded TwoDimensional Market", Regional Science and Urban Economics, Vol. 23, No.2, pp.259289 
1991 
Suzuki, T., Okabe, A. and Asami, Y., "Sequential LocationAllocation Problem of Public Facilities" Mathematical Programming B, Vol. 51, No.1, pp.125146 
1991 
Okabe, A. and Aoyagi, M., "Existence of Equilibrium Configurations of Competitive Firms on an Unbounded TwoDimensional Space", Journal of Urban Economics, Vol.29, No. 3, pp.349370 
1989 
Okabe, A. and Yoshikawa, T., "Multi Nearest Distance Method for Analyzing the Compound Effect of Infrastructural Elements on the Distribution of Activity Points", Geographical Analysis, Vol.21, No.3, pp.216235 
1988 
Okabe, A. and Yomono, H., "Statistical Methods for Evaluating the Geometrical Hierarchy of a Network", Geographical Analysis, Vol. 20, No. 2 (April), pp.122139 
1988 
Okabe, A., Yoshikawa, T., Fujii, A. and Oikawa, K., "The Statistical Analysis of a Distribution of Activity Points in Relation to SurfaceLike Elements", Environment and Planning A, Vol. 20, pp.609620 
1987 
Okabe, A., "Exact Higher Moments of the Nearest Neighbor Distance", Journal of the Faculty of Engineering, The University of Tokyo, Vol.39, No.1, pp.16 
1987 
Okabe, A., "Theoretical Relationship between the RankSize Rule and Clarkfs law of Urban Population Distribution: Duality in the RankSize Rule", Regional Science and Urban Economics, Vol.17, pp.307319 
1987 
Okabe, A. and Suzuki, A., "Stability of Spatial Competition of Many Firms in a Bounded TwoDimensional Space", Environment and Planning A, Vol.19, pp.10671082 
1986 
Okabe, A. and Asami, Y., "The Probability Density Function of an Area Covered with Disks Whose Centers are Randomly Distributed", Communications in Statistics, Vol.15, No.1, pp.121134 
1986 
Okabe, A., Aoki, K. and Hamamoto, W., "Distance and Direction Judgment in a LargeScale Natural Environment: Effects of a Slope and Winding Trail", Environment and Behavior, Vol.18, No.6, pp.755772 
1985 
Okabe, A., Asami, Y. and Miki, F., "Statistical Analysis of the Spatial Association of ConvenienceGoods stores by Use of a Random Clumping Model", Journal of Regional Science, Vol.25, No.1, pp.1128 
1984 
Okabe, A. and Masuda, S., "Qualitative Analysis of TwoDimensional Urban Population Distribution in Japan", Geographical Analysis, Vol.16, No.4, pp.301312 
1984 
Okabe, A. and Fujii, A., "The Statistical Analysis through a Computational Method of a Distribution of Points in Relation to Its Surrounding Network", Environment and Planning A, Vol.16, pp.107114 
1984 
Okabe, A. and Miki, F., "A Conditional NearestNeighbor Spatial Association Measure for the Analysis of Conditional Locational Interdependence", Environment and Planning A, Vol.16, pp.163171 
1983 
Okabe, A. and Kume, Y., "A Dynamic von Thunen Model with a Demand Function", Journal of Urban Economics, Vol.14, pp.355369 
1982 
Okabe, A., "Qualitative Method of Trend Curve Analysis", Environment Planning A, Vol.14, pp.623627 
1982 
Okabe, A., "Spatial Distribution Maximizing or Minimizing Geary's Contiguity Ratio", Journal of the Faculty of Engineering, The University of Tokyo, Vol.36, No.3, pp.523528 
1982 
Okabe, A., "Toward a More Explicit Stochastic Model of a CitySize Distribution: A Reply to Kim's Critique", Environment and Planning A, Vol.14, pp.11211124 
1981 
Okabe, A., "Statistical Analysis of the Pattern Similarity between Two Sets of Regional Clusters", Environment and Planning A, Vol.13, pp.547562 
1980 
Okabe, A., "Stable State Conditions of the PopulationDependent Migration Models under a Zero Natural Growth Rate", Journal of Regional Science, Vol.20, No.3, pp.253264 
1979 
Okabe, A., "Population Dynamics of Cities in a Region: Conditions for a State of Simultaneous Growth", Environment and Planning A, Vol.11, pp.609628 
1979 
Okabe, A., "An Expected RankSize Rule: A Theoretical Relationship between the RankSize Rule and City Size Distributions", Regional Science and Urban Economics, Vol.9, pp.2140 
1977 
Okabe, A., "Formulation of the Intervening Opportunities Model for Housing Location Choice Behavior", Journal of Regional Science, Vol.17, No.1, pp.3140 
1977 
Okabe, A., "Spatial Aggregation Bias in Trip Distribution Probabilities: The Case of the Opportunity Model", Transportation Research, Vol.11, pp.197202 
1977 
Okabe, A., "Some Reconsiderations of Simon's CitySize Distribution Model", Environment and Planning A, Vol.9, pp.10431053 
1976 
Okabe, A., "A Note on Geary's Spatial Contiguity Ratio", Geographical Analysis, Vol.8, No.3, pp.315318 
1976 
Okabe, A., "A Theoretical Comparison of the Opportunity and Gravity Model", Regional Science and Urban Economics, Vol.6, pp.381397 

Okabe, A., Satoh, T., Okabe, K., Nakagawa, T., Imamura, E.,, Matsushita, K., Nagano, K., Ishiwatari, Y., Amemoto, K., Hayashi, Y., Akishinonomiya, F., "Applicability of a Wireless Fidelity Positioning System to Tracking Freerange Domestic Fowl (Gallus gallus domesticus) and Helmeted Guineafowl (Numida meleagris galeata), J. Yamashina Inst. Orinothol., vol. 38, pp3039 
2005 
Okabe, A., Okunuki, K. and Shiode, S., "10. A Toolbox for Spatial Analysis on a Network", GISbased Studies in the Humanities and Social Sciences (Taylor & Francis), pp139152 
2005 
Okabe, A., and Yoshikawa, T., "9. A Toolbox for Examing the Effect of Instractrucural Features on the Distribution of Spatial Events", GISbased Studies in the Humanities and Social Sciences (Taylor & Francis), pp127138 
2005 
Okabe, A., Masuyama, A., and Itoh, F., "8. How to find Free Softwarer Packages for Spatial Analysis", GISbased Studies in the Humanities and Social Sciences (Taylor & Francis), pp113125 
2005 
Okabe, A.,"1. Introduction", GISbased Studies in the Humanities and Social Sciences (Taylor & Francis), pp11 

Gettys, J., Horanont, T., Plews, R., Okabe, A., Okabe, K., Ratanasermpong, S., and Supera, T.,"3D WebBrowser and Database System for a Geographical Study on Domestic Animals in Northern Thailand", Papers and Proceedings of the Geographic Information Systems Association, vol. 14, pp545550 

Takamatsu, J., Uehara, Y., Masuda, T., Nakazawa, A., Ikeuchi, K., Okabe, A., Hayashi, Y., Ino, Y., Oka, T., Nomura, K., Amano, T. and Akisinonomiya, F., "A Novel Osteometrical Method Using Computer Vision Techniques for Comparison of Morphological Differences", Journal of Yamashina Institute for Ornithology, Vol. 36, No. 2, pp120128 
2004 
Okabe, A. "Introducing geographical information systems in Islamic area studies", in Okabe. A. (ed.) Islamic Area Studies with Geographical Information Systems, London: RoutledgeCurzon (Taylor & Francis Group), pp. 117 

Okabe, A. and Masuyama, A. "An explanatory method for discovering qualitatively changed area using low resolution remotely sensed data: a case in the Perusian Gulf area during 198293", in Okabe. A. (ed.) Islamic Area Studies with Geographical Information Systems, London: RoutledgeCurzon (Taylor & Francis Group), pp. 4153 

Okabe, A. and Masuyama, A. "A method for measuring structural stability among activity surfaces and its applications to the analysis of urban population surfaces in Japan", Rana, S. (ed.) Topological Data Structures for Surfaces: An Introduction to Geographical Information Science, John Wiley, 105120. 
2003 
Okabe, A., "A new approach to
spatial analysis: spatial analysis on a network with SANET, Invited Lecture, 
2002 
Masuyama, A., Okabe, A. and Kojima, T. "Supposedly identical tessellations: Methods for detection and adjustment ", GIScience 2002 abstracts, pp. 105107 
2002 
Okabe, A., Okunuki, K., Funamoto, S. and Ishitomi, T. "A toolbox for spatial analysis on a network and its software ", GIScience 2002 abstracts, pp124126 
2002 
Yigitcanlar, T. and Okabe, A., gBuilding online participatory systems: Towards the community based interactive environmental decision support systemsh, Working paper at the United Nations University, Institute of Advanced Studies, May 2002, Tokyo, Japan 
2001 
Boots, B., Okabe, A. and Thomas, R. Guest Editorial:"Statistical and computational applications of geographical systems models", GeoJournal, Vol. 53, No. 4, pp337 
2001 
Morita, M., Okunuki, K. and Okabe, A.,gA market area analysis on a network using GIS  A case study of retail stores in Nisshin City, Papers and Proceedings of the Geographic Information Systems Association, Vol.10, pp.4550 
2001 
Okunuki, K., Itoh, S., Okabe, A., Goto, Y., Kaneko, T., Shinoaki, S., Akita, Y., Kotsubo, H., Okita, Y., Tatematsu, T. and Shiozaki, G.,gA mobile GIS for fieldworkh, Abstracts of Symposium on Asia GIS 2001, pp.2021 (proceedings published as CDROM) 
2001 
Leung, U., Okabe, A., Guest Editorial (2001) gThe International Conference on Modeling Geographical and Environmental Systems with Geographical Information Systemsh, Geographical & Environmental Modelling, Vol. 5, No. 2, 109110 
2000 
Sato, T., Sadahiro, Y. and Okabe, A., " An interactive method of detecting and visualizing the property of spatial data for joining spatial data units", Papers and Proceedings of the Geographic Information System Association 2000, Vol.9, pp.399402 
2000 
Okunuki, K., Itoh, S., Okabe, A., Kaneko, T., Goto, Y., Shinoaki, S., Tatematsu, T. and Shiozaki, G., "Development of a portable GIS for fieldwork: using GIS for Geographic education in university", Papers and Proceedings of the Geographic Information System Association 2000, Vol.9, pp.263268 
2000 
Goto, Y., Yamada, I., Okabe, A., Ymazaki, T., Takasaka, H., Kaneko, T. and Takami, K., "A basic analysis of timespace behavior of sportsclub members," Papers and Proceedings of the Geographic Information System Association 2000, Vol.9, pp.219223 
2000 
Masuyama, A., Okabe, A., Kimura, T., Kure, T., Kobayashi, Y., Kounou, Y., Tanaka, M., Tsubaki, T. and Fukou S., "A system which shows an optimal route considering user's mobility", Papers and Proceedings of the Geographic Information System Association 2000, Vol.9, pp.195198 
1999 
Okabe, A., Masuyama, A. gA method for qualitative trend curve analysis and its application to land cover change in Persian gulf areah, Islamic Area Studies Working Paper Series, No.17, pp.128 
1998 
Okabe, A., Okunuki, K., Sagara, S.,
Kamachi, T., and Shiode, N., "Virtual Ryoanj project: Implementing a
computerassisted collaborative 
1998 
Maniruzzaman, K. M., Okabe, A. and Asami, Y., "GIS for Disaster Management: In the Context of Cyclones in Bangladesh", Proceedings of International Conference on Modeling Geographical and Environmental Systems with Geographical Information Systems, Vol.1, 304311 
1998 
Izumi, T., Okabe, A., Sadahiro, Y. and Ichinose, T., "The Effect of the Relocation of Japanese Capital on a Thermal Environment", Proceedings of International Conference on Modeling Geographical and Environmental Systems with Geographical Information Systems, Vol. 1, 713 
1997 
Sadahiro, Y., Fukui, H., Izumi, T., Okabe, A., and Ichinose, T., "Heat Island in New Capitals: A Simulation Study", Proceedings of International Symposium on Monitoring and Management of Urban Heat Island, 1920 November 1997, Kanagawa, Japan 
1997 
Okabe, A. and Suzuki, A., Invited Review "Locational Optimization Problems Solved Through Voronoi Diagrams", European Journal of Operational Research, Vol.98, 445456 
1994 
Okabe, A, "VORONOI2: A FORTRAN program for constructing the Voronoi diagram", Software Review, Geographical Systems, Vol.1, pp. 347349 
1994 
Okabe, A., Book Review on "The CosmoCreative Society: Logistical Networks in a Dynamic Economy", Journal of Regional Science, Vol.34, No.4, pp.613615 
1993 
Maniruzzaman, K., Asami, Y., and Okabe, A., "Land Use and the Geometry of Lots in Setagaya Ward", Papers and Proceedings of the Geographic Information Systems Association, Vol.2, pp.1924 
1993 
Kawashima, K., Hiraoka, N., and Okabe, A., "Metropolitan analysis: Boundary Delineations and Future Population Changes of Functional Urban Regions", Gakushuin Economic Papers, Vol. 29, No. 3, 4, pp. 205248 
1992 
Okabe, A., Sadahiro, Y., "A Statistical Method for Estimating Market Areas from a Population Distribution", Discussion Paper Series, 49, Department of Urban Engineering, University of Tokyo 
1989 
Okabe, A., Book review on "Advanced Spatial Statistics" authored by Daniel Griffith, Journal of Regional Science, Vol. 29, pp.668669 
1975 
Okabe, A, "Contributions to the Study of Stochastic Spatial Interaction Models", A Dissertation in Regional Science , Presented to the Graduate Faculty of the University of Pennsylvania in Partial Fulfillment of the Requirements for the degree of Doctor of Philosophy, pp.1203 
2005 
Okabe, A., GISbased Studies in the Humanities and Social Sciences, Taylor & Francis 

Okabe, A. and Masuyama, A. "A method for measuring structural stability among activity surfaces and its applications to the analysis of urban population surfaces in Japan", Rana, S. (ed.) Topological Data Structures for Surfaces: An Introduction to Geographical Information Science, John Wiley, 105120. 
2004 
Okabe, A., Islamic area studies with Geographical Information Systems, Routledge Curzon (received "The World Prize for the Book of the Year of the I.R. of Iran in 6 Feb., 2006) 
2003 
Boots, B., Okabe, A. and Thomas, R. Modelling Geographical Systems: Statistical and Computational Applications, London: Kluwer 
2000 
Okabe, A., Boots, B. and Sugihara, K., and Chin,SN.,"Spatial Tessellations: Concepts and Applications of Voronoi Diagrams," 2nd edition", Chichester: John Wiley 
1995 
Suzuki, A. and Okabe, A., "Using Voronoi Diagrams", in Drezner, Z. (ed.), Facility Location, New York: SpringerVerlag, pp.103118 
1992 
Okabe, A., Boots, B. and Sugihara, K., Spatial Tessellations: Concepts and Applications of Voronoi Diagrams, Chichester: John Wiley 
2005 
Satoh, T. and Okabe, A. "Methods for finding hot spots on a network", The annual Meeting of AAG Meeting, Denver, April 59 
2005 
Okabe, A. Ratanasermpong, S., Nonaka, K., Ikeguchi, A., Okabe. K. and Ishikawa, N. "Toward geographical studies on humanChicken MultiRelationships Congress in Tokyo, March 2830 
2004 
Boots, B. and Okabe, A. "Local statistical analysis: inventory and prospect", The 30th Congress of the International Geographical Union, Glasgow, UK, August 1520 
2004 
Shiode, S. and Okabe, A. "Cell Count Method on a Network with SANET and Its Application",@International Conference on Geoinformatics and Geographical Systems and Modeling, Beijing, April 24 
2004 
Shiode, S. and Okabe, A. "Network Variable Clumping Method (NVCM) for Analyzing Point Patterns on a Network, AAG Meeting, Philadelphia, March 1419 
2004 
Okabe, A., "Toward ubiquitous, pervasive and internet mapping", international joint workshop on ubiquitous, pervasive and internet mapping (UPIMap2004), Keio University, Tokyo, Japan Sept 8th 
2003 
Okabe, A., "A New Approach to Spatial Analysis: Spatial Analysis on a Networkwith SANET", Invited Lecture, The 8th international conference on computers in urban planningand urban management CUPUM '03 Sendai, Sendai, Japan May 27th29th 
2003 
Okabe, A., Okunuki, K., Funamoto, S., and Ishitomi, T., "Point Pattern Analysis on a Network and its Software Package, SANET, Point Pattern Analysis in GIS Environments: new@approaches1", Association of American Geographers (AAG) Annual Meeting, New Orleans, LA., March 5th8th 
2003 
Yoshikawa, T. and Okabe, A., "A Toolbox for Analyzing the Effect of Infrastructural Facilities on Thedistribution of Activity Points, Point Pattern Analysis in GIS Environments: New@Approaches1", Association of American Geographers (AAG) Annual Meeting, New Orleans, LA, March 5th8th 
2003 
Itoh, F. and Okabe, A., "A Web System for Finding Free Software Packages of Spatial Analysis, Spatialanalysis and modeling II" , Association of American Geographers (AAG), Annual Meeting, New Orleans, LA, March 5th8th 
2002 
Okabe, A., Okunuki, K., Funamoto, S. and Ishitomi, T., "A Toolbox for Spatial Analysis on a Network and its Software", The Second International Conference on Geogrpahical Information Science, Boulder, Colorado, USA, September 25th28th 
2002 
Masuyama, A., Okabe, A., Kojima, T., "Supposedly identical tessellations: Methods for detection and adjustment" ,The Second International Conference on Geogrpahical Information Science, Boulder, Colorado, USA, September 25th28th 
2002 
Okunuki, K., Itoh, S., Okabe, A., Goto, Y., Kaneko, T., Shinoaki, S., Akita, Y., Kotsubo, H., Okita, Y., "A Mobile GIS for Fieldwork in Geographical Studies", Association of American Geographers (AAG), Annual Meeting, L.A., USA, March 19th23th 
2001 
Sato, T., Sadahiro,Y., Okabe, A., "An Interactive Method for Joining Spatial Data Units" presented at the AAG Conference , New York, USA, February 27thMarch 3rd 
2000 
Okabe, A. "Spatial Analysis on a Network with GIS" presented at the International Conference on Geographic Information Science,Savannah, Georgia, USA October 28th31st 
2000 
Watanabe, T., Okabe,A., Izumi, T., and Sadahiro, Y., "Analysis of the Effect of Land Use Ppatterns on Energy Consumption Using a Modified CSU Mesoscale Model, T20s", (Modelling Geographical Systems organized by the IGU Commission 15), International Geographical Congress, Seoul, korea, August 14th18th, 
1999 
Okunuki, K. and Okabe, A., "A Comuputational Method for Optimizing the Location of a Store on a Continuum of a Network when Users' Choice Behavior Following the Huff model " IFORS' 99 Conference, Beijin, China, August 16th21th. 
1999 
Shiode, N., Okabe, A., "A Computational Method for Optimizing the Shape and Location of a Polygon on a Plane", The International Federation of Operational Research Societies, Beijing, China, August 16th20th 
1999 
Okunuki, K., Okabe, A., "A Computational Method for Optimizing the Location of a Store on a Continium of a Network when Users' choice Behavior Follows the Huff model", The International Federation of Operational Research Societies, Beijing, China, August 16th20th 
1999 
Okabe, A. and Funamoto, S., "A Spatial Clumping Method Based on a Delaunay Triangulation and Its Application", Abstracts of the 95th Annual Meeting of The Association of American Geographers, Honolulu, Hawaii, USA, March 23th27th 
1999 
Masuyama, A., Okabe, A., "A Robust Exploratory Methods for Qualitative Trend Curve Analysis Against Poor Quality Data", Associtation of American Geographers (AAG) Annual Meeting, Honolulu, Hawaii, USA, March 24th27th 
1998 
Okabe, A., Funamoto, S., "An Exploratory Method for Detecting Spatial Hierarchy in the Distribution of Points: A Computer Program, VMC", Commission on Modelling Geographical Systems Lisbon Conference: Spatial Analysis and Environmental Processes, August, 28th29th, Preconference of the IGU Regional Conference, Lisbon, Portugal August 30th September 2th, 
1998 
Izumi, T., Okabe, A., Sadahiro, Y. and Ichinose, T., "The Effect of the Relocation of Japanese Capital on a Thermal Environment", Proceedings of International Conference on Modeling Geographical and Environmental Systems with Geographical Information Systems, Vol. 1, pp.713; Hong Kong, China, June 
1998 
Okabe, A., Okunuki, K., Sagara, S., Kamachi, T. and Shiode, T., "VIRTUAL RYOANJI PROJECT: Implementing a Computerassisted Collaborative Working Environment of a Virtual Temple Garden", International Workshop on Groupware for Urban Planning, February, Lyon, France 
1996 
Okabe, A. and Kitamura, M., " Computational Methods for Market Area Analysis on a Network", Abstract of the 92nd Annual Meeting of The Association of American Geographers, p222, North Carolina, U.S.A April 9th13th 
1993 
Okabe, A., "Statistical Analysis of the Effect of Geographical Elements on the Distribution of Activity Points on a Network Using GIS", Abstracts of the 89th Annual Meeting of The Association of American Geographers, p.181, Atlanta, USA, April 6th10th 
1988 
Okabe, A. and Aoyagi, M., Existence of Equilibrium Configurations of Competitive Firms on an Infinite Two Dimensional Space", Regional Science Meeting Association, Toronto, Canada, November 11th13th 
1983 Kau, J.B., Johnson, L.L., "Regional Science Programs: A
Ranking Based on Publication Performance", Journal of
Regional Sciences,
vol.23,no.2, pp177186