Recently, disclosure of statistic data, representing financial effects or burden for public work, through each web site of national or local government, enables us to discuss macroscopic financial trends. However, it is still difficult to grasp a basic property nationwide how each spot was changed by public work.
 In this research, our research purpose is to collect road update information reasonably which various road managers provide, in order to realize efficient updating of various maps such as car navigation maps. In particular, we develop the system extracting public work concerned and registering summary including position information to database automatically from public work order outlook, released by each local government, combinating some web mining technologies. Finally, we collect and register several tens of thousands from web site all over Japan, and confirm the feasibility of our method.

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 This paper builds a dynamic stochastic macroeconomic model which deals with investment to disaster prevention infrastructure stock. The nature of disaster such as uncertainty, magnitude of damage and long run effects of damage are explicitly modeled. The model can derive optimal policy with regard to investment to productive capital stock and disaster prevention infrastructure stock. Furthermore, the numerical simulations give some interesting implications about the relationship between optimal investment policy, magnitude of disaster, level of economic development and disaster prevention technology.

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 This study evaluates the result of the Comprehensive National Land Improvement Plans in Japan from the point of view of the mutual relation among the areas, using the data which is gotten from the inter-regional input-output table. In the research, it considers the idea of the connection among the areas which the Plans have regarded as important. It classifies connection relation into three kinds of the connection of the one's own local, to the other area, to the foreign countries. While comparing country-by-country, it evaluates saying the getting of certain good results by the uniting policy in the country which the Plans showed.

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 Now that it has been often pointed out that the policy concerned with landscape can have a good effect on regional development, a theoretical study is strongly required to help establish a theory that rationalizes the methodology of policy making and its practice, which lead to a solution of various problems concerned with deterioration, self-government etc. that lots of municipalities face.
 In this study, we analyzed the policy process adopted in Kaida-mura village in Nagano prefecture forcussing on policy information and the related social actors. We clarified the structure of policy process and developments of policy. We then analyzed the changes of the frameworks of social actors' activities and the changes of characteristics of landscapes there. We clarified the structure of influences of policy on them. Then we observed the circulating process of how the framework of a community and its local rules are renovated and reestablished. Finally, we clarified the structural relationship between policy concerning landscapes and re-establishment of the basis of self-government, and also clarified the principle of how this relationship can be generated and formed.

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 Last decade, many proposal systems have been introduced as a form of decentralization efforts. Under the proposal systems, local governments can make proposals related to their regional policies or projects, then the central government assesses the proposals and supports only the proposals that have passed its assessment. In this study, we reexamine the achievements and problems of the proposal systems from the viewpointts of local governments in Tohoku region. Firstly, using the database of implemented policies and projects, we show the characteristics of the local governments that are positive for the proposal systems. Then, using the results of questionnaire survey, we show the impacts of the introduction of proposal systems on the planning process of regional policy in the local governments.

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 This paper attempts to examine the long-term changes of cross-sectional variations in Japanese time use behaviour by establishing a multilevel multiple discrete-continuous extreme value model. The model describes both activity participation and time allocation behaviour by incorporating two different unobserved variation components: interindividual variation and spatial variation (at the prefecture level). The incorporations of such unobserved components into the discussion of long-term changes can provide information on changes in the diversification of activity-travel patterns. An empirical analysis was conducted by using national time use data at four points in time (1986, 1991, 1996, and 2001) from the "Survey on Time Use and Leisure Activities" collected by the Ministry of Internal Affairs and Communications in Japan. The most important finding from the empirical analysis is that given the explanatory variables used in this study, Japanese time use behaviour has certainly changed toward increasing effects of unobserved interindividual variations. This implies that a stochastic nature in behaviour becomes more dominant as time passes, suggesting some new challenges for describing activity-travel patterns in the long term.

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