Atsuimachi General Incorporated Association (Headquarters: Tajimi City, Gifu Prefecture; Representative Director: Yuhei Nakajima, hereinafter referred to as Atsuimachi), with the support of the Ministry of the Environment, various prefectures, and cities, held the "13th Atsuimachi Summit 2026" on Saturday, June 20, 2026. The event was co-hosted by the Environment Restoration and Conservation Agency of Japan, and brought together community development organizations from seven cities that have recorded Japan's highest temperatures: Isesaki City (Gunma Prefecture), Tamba City (Hyogo Prefecture), Hamamatsu City (Shizuoka Prefecture), Kumagaya City (Saitama Prefecture), Shimanto City (Kochi Prefecture), Tajimi City (Gifu Prefecture), and Yamagata City (Yamagata Prefecture). A group photo of the Atsuimachi Summit participants. This year, workshops were also held to discuss five themes related to heatstroke prevention from the perspectives of a wide range of people, from young to elderly in each region, and presentations were made on initiatives for this summer. Last year, the domestic highest temperature was updated for the first time in seven years, with 41.8°C recorded in Isesaki City on August 5, 2025. Furthermore, in April 2026, the Japan Meteorological Agency announced that days with temperatures of 40°C or higher would be called "extreme heat," and measures against heat are attracting attention. Atsuimachi, along with the seven cities that have recorded the highest temperatures in Japan, will promote heatstroke prevention measures. 13th Atsuimachi Summit 2026 ◾️Greeting from Mr. Tomo Iizuka, Director General of the Environment Restoration and Conservation Agency of Japan Regarding heatstroke prevention, he stated, "Appropriate warnings and behavioral changes are necessary. It is important for each individual to raise their awareness, pool their wisdom, and work on countermeasures. In this regard, I believe this summit is a meaningful opportunity to promote heatstrok