1331. The Hottest Summer on Record

According to a September 1st announcement by the Japan Meteorological Agency, the deviation from the reference value (the 30-year average from 1991 to 2020) of Japan's average temperature in the summer of 2025 (June to August) was +2.36°C, the highest since records began in 1898. This marked the highest temperature ever recorded, significantly exceeding the previous record set in 2024 (+1.76°C). Japan's average summer (June-August) temperature has been rising, with various fluctuations, and over the long term has increased at a rate of 1.38°C per century. The seasons are progressing quite quickly, with the rainy season beginning in May and ending in June— except in the Tohoku region—marking the earliest recorded end since records began in 1951 in some areas.
 
An editorial in the August issue of Nature described the summer of 2025 as "roasting hot."

Last year, the "JIRCAS International Symposium 2024 : Resilient Genetic Resources for Food Security in the Era of Global Boiling – Opportunities and Challenges for Conservation and Utilization" discussed opportunities for conserving and utilizing genetic resources to build resilient food systems against the threats of biotic and abiotic stresses emerging due to climate change.

Please find the proceedings at the link below.
https://www.jircas.go.jp/ja/symposium/2024/e20241122_jircas

Contributor: IIYAMA Miyuki, Information Program