Thermal comfort; Japan; Occupant behaviour; Adaptive model; Window opening

Japan’s energy perspective underwent a paradigm shift after the 2011 earthquake. It put in place the ‘setsuden’ (energy saving) campaign. This recommended minimum and maximum temperature settings for summer and winter, without enough empirical evidence. Many large offices adhered to these, often running them in naturally ventilated (NV) mode. In this context, we surveyed four buildings in Tokyo in summer 2012.  About 435 participants provided 2042 sets of data. It contained thermal responses, simultaneous environmental recordings and observations on the use of controls.