Abstract
In this study, first we present the framework of the land use impact assessment method which is designed as a component of the life-cycle impact assessment system of endpoint damage approach in the National LCA project in Japan. Ecosystem is selected as safeguard subject by land use in this method. The output indicator of the endpoint damage in this study is loss of net primary productivity (NPP) of vegetations. Then, in order to make this method operational, we show the result of calculation of the damage factors by NPP. The factors are based on the calculated actual and potential NPP distribution by using vegetation and land use map, and climatic data, etc. in Japan.