An initiative to research and develop ground-source thermal energy technologies through NEDO (New Energy and Industrial Technology Development Organization) joint research and the construction and operation of demonstration plants, and to promote the adoption and commercialization of the Heat-Gw-Power cascade system based on its track record of compliance with ZEB (Net Zero Energy Building) and BELS (Building Energy-efficiency Labeling System) standards and its ETV (Environmental Technology Verification) demonstration.