Mitsubishi Jisho Sekkei Inc. was commissioned by the Japan Real Estate Investment Corporation (JRE) to examine the possibility of reducing CO₂ emissions for its entire portfolio and to identify properties that could be converted to net-zeroenergy buildings (ZEB)^*1 while carrying out concrete examinations aimed at converting such properties to net-zero-energy buildings. Specifically, Mitsubishi Jisho Sekkei proposed methods for reducing CO₂ emissions by analyzing building age, building envelope performance, building scale, and air-conditioning and lighting systems. Based on the analysis results, JRE set a target of converting between five and 10 of its properties to net-zero-energy buildings by 2030. As a first step toward achieving this target, JRE acquired ZEB Ready^*2 certification at the design stage and a five-star rating under the Building- Housing Energy-efficiency Labelling System (BELS) for its Higashi-Gotanda 1-Chome Building.

*1 Buildings with annual primary energy consumption of net zero or less

*2 As advanced buildings in anticipation of ZEB certification, buildings awarded ZEB Ready certification are those with primary energy consumption that has been reduced more than 50% compared with standard primary energy consumption, excluding renewable energy.