CASBEE (Comprehensive Assessment System for Built Environment Efficiency) is the green building certification program used in Japan. It was created by a research committee called the Japan Sustainable Building Consortium (JSBC). The first assessment tool, CASBEE for offices, was launched in 2002. CASBEE now consists of multiple assessment tools tailored to different project scales. The tools are collectively called the CASBEE family. The development of CASBEE's assessment tools was a joint effort between JSBC sub-committees, industry, academia, and government leaders, and the Japanese Ministry of Land, Infrastructure, Transport and Tourism. The JSBC provides overall management of CASBEE, and the administrative office is located within the Institute for Building Environment and Energy Conservation (IBEC).
The first green building rating systems, including BREEAM and LEED, were developed to minimize the building sector's contribution to anthropogenic climate change. CASBEE shares the same goal, but rather than being established by non-profit third parties, the government played a direct role in its formation. The Japanese government has declared the goal of carbon neutrality by 2050, and reaching this goal motivates the government's continued commitment to the promotion and development of CASBEE. Local governments have a Sustainable Building Reporting System (SBRS) policy intended to create a sustainable building market by requiring the submission of building environmental plans to the local building official. 24 cities have adopted CASBEE as the standard for their SBRS policy. Additionally, many local governments require CASBEE assessment results when applying for building permits.