Abstract: After the“3·11” earthquake, the development strategies of smart grid in Japan have been optimized and improved. The paper attempts to summarize the published policies and planning of smart grid in Japan, and depicts the profile of smart grid in Japanese eyes from the perspective of definition, function and development priority. Moreover, an analysis is made on the technology progress, standard development and pilot project construction in such key fields as renewable energy generation, energy storage battery and smart home.

Key words: Japan, smart grid, policy, technology, standard