The management of electric power demand is a key element in the creation of smart-energy communities. We are engaged in a field experiment with the participation of 51 households on Nushima Island, one of the remote islands of Japan, to study the effects of real-time feedback and dynamic pricing on electric power consumption using smart meters and tablet PCs. From the results of panel data analysis, we have found that these measures achieve an estimated saving of 22 percent in electric power consumption when the tablet PCs are accessed three times per day.