Japan Endures Record Five-Day Streak of 40°C+ Heat
Japan recorded temperatures above 40 °C for a fifth consecutive day on 25 July 2026, marking the longest such streak since comparable records began in 2010. The Japan Meteorological Agency (JMA) designated these days as “kokushobi” – “cruelly hot days” – after six central cities, chiefly in Aichi and Gifu prefectures, surpassed the 40 °C threshold.
The extreme heat triggered a health emergency. Tokyo hospitals saw a record 453 heat‑related admissions on 23 July, the highest number in the 16‑year series. Nationwide, the Fire and Disaster Management Agency reported that between 13 July and 19 July nearly 11 000 people required emergency medical treatment for heat‑related illnesses, and 14 fatalities were confirmed. Authorities declared the situation a “disaster” and warned residents to stay hydrated, use air‑conditioning, and avoid unnecessary outdoor activity.
Japan typically suffers about 1 300 heat‑related deaths each year and has set a goal to cut that figure in half by 2030. Scientists link the increasing frequency and intensity of such heatwaves to human‑driven climate change. The country also experienced its hottest summer on record in 2025, with a peak of 41.8 °C recorded in Isesaki, Gunma.
Heat alerts were issued across 37 of Japan’s 47 prefectures, and a dominant Pacific high‑pressure system kept skies largely clear, further intensifying the heat.
Entities: Fire and Disaster Management Agency · Japan · Japan Meteorological Agency (JMA) · Pacific high‑pressure system · Tokyo
Claims
What the coverage asserts, and how well corroborated each claim is across sources.
- [● 4 SOURCES] Fourteen people died from heat‑related causes during that week. (multiple articles)
- [● 4 SOURCES] Tokyo recorded a record 453 heat‑related hospitalisations on 23 July, the highest in 16 years. (multiple articles)
- [● 4 SOURCES] Japan experiences about 1 300 heat‑related deaths annually and aims to halve that number by 2030. (multiple articles)
- [● 4 SOURCES] Approximately 10 800–11 000 people received emergency medical treatment for heat‑related illnesses between 13 July and 19 July 2026. (multiple articles)
- [● 4 SOURCES] Japan declared the heatwave a “disaster” and urged the public to treat extreme heat as such. (multiple articles)
- [● 5 SOURCES] The five‑day streak is the longest since comparable records began in 2010. (multiple articles)
- [● 6 SOURCES] Japan experienced five consecutive days with temperatures exceeding 40 °C on 25 July 2026. (multiple articles)
- [● 6 SOURCES] Six central cities, chiefly in Aichi and Gifu prefectures, recorded temperatures above 40 °C, qualifying as “kokushobi”. (multiple articles)