■ Development of environmental barrier coating (EBC) is necessary for the practical application of light-weight ceramic components in order to improve fuel efficiency and reduce CO2 emissions for aircraft jet engines. We are developing excellent EBC and interphase coating technology with optimum structural and material design. ■ EBC technology applicable to the production of the light-weight ceramic components promotes the commercialization of advanced aircraft engine technology in Japan, and enhances the domestic supply chains, from raw materials to finished products. Ceramic Coating Development of Ceramic Environmental Barrier Coating