- Best Paper of the Year 2011, Japan Association for Planning Administration, 2011.
- Best Paper of the Annual Conference 2009, City Planning Institute of Japan, 2009.
- Best Research Papers, Association of GIS in Japan, 2007.
- First Prize, Visual Science Festa 2002 (RVI: Regional Image Visualizer:
A GIS-based system for visualizing regional images, IGARASHI, Yoshio and
Yukio SADAHIRO, 2003)
- The 11th International Symposium on Spatial Accuracy Assessment in Natural Resources and Environmental Sciences, Scientific committee, East Lansing, Michigan, USA, 2014.
- ISPRS/IGU Joint International Conference on Geospatial Theory, Processing, Modelling and Applications, Scientific committee, Toronto, Canada, 2014.
- ICA Workshop on Street Networks and Transport, Program committee, Dresden, Germany, 2013.
- The 10th International Symposium on Spatial Accuracy Assessment in Natural Resources and Environmental Sciences, Program committee, Florianopolis, SC, Brazil, 2012.
- The 15th International Symposium on Spatial Data Handling, Program committee, Bonn, Germany, 2012.
- International conference Spatial Thinking and Geographic Information Sciences, Scientific committee, Tokyo, Japan, 2011.
- The 1st International Conference on Spatial Data Mining and Geographical Knowledge Services in conjunction with the 8th International Workshop on Geographical Information Systems, Program committee, Fuzhou, China, 2011.
- The 14th International Symposium on Spatial Data Handling, Program committee, Hong Kong, China, 2010.
- The 8th International Conference on Computers in Urban Planning and Urban Management, Program committee, Sendai, Japan, 2003.
Journal Boards and Editorships
- Geographical Analysis (Editorial Board Member, 2003-)
- Transactions in GIS (Editorial Board Member, 2006-)
- International Journal of Society Systems Science (Editorial Board Member, 2010-)
- Theory and Applications of GIS（Editorial Board Member, 1999-2002, 2004-2007）
- Papers on City Planning（Editorial Board Member, 2002-2004）
- Geographical Review of Japan（Editorial Board Member, 2006-）
- Computers, Environment and Urban Systems
- European Journal of Operational Research
- Geocarto International
- Geographical Analysis
- International Journal of Geographical Information Science
- International Journal of Remote Sensing
- International Journal of Society Systems Science
- International Regional Science Review
- Journal of Asian Architecture and Building Engineering
- Journal of Geographical Systems
- Journal of the Operations Research Society of Japan
- Landscape Ecology
- Papers in Regional Science
- Photogrammetric Engineering and Remote Sensing
- Transactions in GIS
- Urban and Regional Planning Review
- City Planning Review
- Geographical Review of Japan
- Japanese Journal of Photogrammetric Engineering and Remote Sensing
- Journal of Applied Regional Science
- Journal of Architecture, Planning and Environmental Engineering
- Journal of Property Assessment Policy
- Operations Research
- Papers on City Planning
- Planning and Policy
- Theory and Applications of GIS
- Urban Housing Sciences