On December 22, the Energy Conservation Center, Japan (ECCJ) announced the ‘2021 Energy Conservation Grand Prize for excellent energy conservation equipment’, the 11th in the series. The awards are given every year with the aim of contributing to the construction of an energy-saving society by expanding awareness of energy savings throughout the country and popularizing energy-saving products. The Energy Conservation Grand Prize consists of two categories, the Energy-saving case category and the Product/business model category.