Japan's Ministry of the Environment began its "Cool Biz" initiative on May 1 [1], allowing employees to work in light clothing through September [2].
The program aims to lower energy consumption by reducing reliance on air conditioning during the summer heat. By changing dress codes, the ministry seeks to promote broader measures against global warming.
Staff members at the ministry's headquarters in Kasumigaseki, Tokyo, are now permitted to wear short-sleeved attire, such as polo shirts [1]. The designated period for these focused efforts runs from May 1 through the end of September [2].
Officials from the ministry's Global Warming Countermeasures Division said the goal is to encourage the appropriate use of air conditioners while maintaining a comfortable working environment [2].
Employees have already begun adopting the new dress code. One ministry staff member said, "Today I came in a breathable polo shirt, and I can work in a relaxed way" [1]. Another employee said that while the humidity was high, they were able to spend the day comfortably without sweating [1].
The initiative encourages a shift away from traditional formal business wear, which often includes jackets and ties, to mitigate the energy spikes associated with summer cooling [2]. This five-month period serves as a primary window for the ministry to lead by example in energy conservation [3].
“"Today I came in a breathable polo shirt, and I can work in a relaxed way"”
The Cool Biz campaign is a long-standing Japanese cultural and governmental effort to synchronize workplace fashion with environmental goals. By relaxing the strict formality of Japanese business attire, the government attempts to lower the national carbon footprint and reduce the strain on the electrical grid during peak summer months.
