Dielectrics and insulating materials research activities in Japan

This article reports the state-of-art of TC-DEI (Technical Committee of Dielectrics and Electrical Insulation of IEEJ) activities. The activities are basically based on the activities of 8-10 investigation committees under TC-DEI. Recent activities were categorized into three functions in this article. Those are activities on asset management (AI application and insulation diagnosis), activities on new insulating and functional materials (nanocomposite) and activities on new insulation technology for power transmission (high Tc superconducting cable insulation).