Abstract
The effect of the climate change on the worktime reduction due to heat stresses can produce serious economic impact. In this study, we investigated two possible adaptation measures, i.e. shifting work time and lowering work intensity by machinerization. Future workable hours are estimated based on a recommendation to prevent heat-related injuries. Without climate-change mitigation, at the end of the 21st century, start time of the work has to be shifted approximately 6 hours to keep current-level workable hours. On the other hand, if the temperature rise is kept below 2 degrees Celsius compared to the pre-industrial level, required shift time is estimated to be less than 2 hours. Lowering work intensity also contributes to alleviating worktime reduction, but not all type of works are able to be machinerized. Considering these facts, it is highly important to implement climate-change mitigation policies in order to reduce difficulties in adaptation measures.
