About this Collection

Comprehensive Assessment System for Built Environment Efficiency (CASBEE) is a method for evaluating and rating the environmental performance of buildings and the built environment. CASBEE was developed by a research committee established in 2001 through the collaboration of academia, industry and national and local governments, which established the Japan Sustainable Building Consortium (JSBC) under the auspice of the Ministry of Land, Infrastructure, Transport and Tourism (MLIT).

CASBEE has been designed to both enhance the quality of people's lives and to reduce the life-cycle resource use and environmental loads associated with the built environment, from a single home to a whole city. Consequently, various CASBEE schemes are now deployed all over Japan and supported by national and local governments. This website provides overall information about CABEE, associated with presentative green buildings with CASBEE evaluation.

For accreditation of the assessment result, CASBEE has two authorization systems. One is the certification system, and another is the local governments' reporting system. The latter is the system that the local governments review the assessment result by CASBEE tools in a shorter time than the certification which is usually regarded as a semi-certification.

The numbers of the projects based on these two systems are as follows. The buildings’ list below shows a part of information of the two systems.

Certified Projects: 530 (as of May 2016) Reported to the Local Governments: 16471 (as of March 2015)