The purposes of this paper is to construct a regional material flow accounts, understand structural changes from 1995 to 2000 and apply this accounts to the analysis of impacts of industrial, economic and environmental policies for local environment in Shiga Prefecture, Japan, where there is the Japan’s largest lake and ecological sustainability has crucial since industrialization, development of nature and extraction of resources began in 1960s in this region.
Material flow account system that we constructed consists of more than 180 industrial sectors, approx. 30 industrial waste treatment sectors, one municipal solid waste treatment sector and one sewerage disposal sector, and each sector has its account of input and output of goods and the discharge of wastes, CO2, and water pollution loads. This account system helps us finding characteristics of local economic-environmental problems and solutions to them.
The authors evaluated structural changes of industry and economy of Shiga Prefecture from 1995 to 2000 applying Eco-Efficiency.
The main result is that Eco-Efficiency (defined as total material input required to produce one unit of GDP) of whole economy in this region was improved by 27% and that of manufacturing industry was improved by 16%, while the economy has been shifted to service industries over time. Finally, it was showed that regional sustainability increased and industry improved its material use in the period.