The Sea of Japan area consists of Japan, South Korea, China, and Far East Russia in Northeast Asia. The Sea of Japan is typical closed ocean and has a characteristic to be easily deteriorated by human activities around the countries and regions in the future. Hence, the Northeast Asia countries have to cooperate with one another in order to conserve or improve the seawater environment and attain the sustainable development. In this study, we try to develop a system simulation model, which describes the structure of water pollutant inflow and the socio-economic system of the target countries and regions of the Sea of Japan area. From the viewpoint of integrated water environmental management, the model can take into consideration with the international investment policy to reduce the water pollutant emission from industrial activities in the target countries over a certain period of time by a dynamic simulation.

JEL classification : C61, P49, Q53, Q56, R19