This paper refers to which industries Japan should develop for its growth in the future. The current key industries in Japan are Auto, Steel, and Electrical machinery. They generate more revenues than other different industries, and are surely the driving forces of the Japanese economy. In the last decades, however, they have been gradually losing their competitiveness in the global market. As the result of this, Japan has been stagnant last twenty years after having achieved great economical success. In this paper, three industries, Water related, Tourism, and Contents industries, are chosen as new key industries out of eight potential industries. Three conditions, vast scale of economy, future demand, and Japanese companies’ competitiveness, are regarded as the key factors for these new key industries to be chosen. These three industries will be the next driving forces for Japanese economy in the future.