Rainy season ends in Japan’s key economic regions, one day behind schedule

The Japan Meteorological Agency (JMA) officially declared the end of the rainy season for the Kanto, Koshinetsu, and Tokai regions at 11:00 on July 20, 2026. The announcement, made via NHK News Japan, confirms that the climatic period known as tsuyu has concluded for these major population and economic centres.

According to the agency’s assessment, the termination of the rainy season occurred one day later than the historical average for these specific districts. This slight delay places the current meteorological timeline marginally behind the standard seasonal benchmarks typically observed in the region.

At the time of the declaration, the affected areas were under the direct influence of a high-pressure system. This atmospheric condition has resulted in clear skies and effectively ended the prolonged cloudy and wet conditions characteristic of the early summer monsoon.

Looking ahead, the JMA forecasts that the high-pressure system will maintain its dominance over the region. Sunny weather is expected to persist for the next seven days, providing a stable meteorological outlook for the immediate future.

The conclusion of the rainy season in the Kanto, Koshinetsu, and Tokai regions marks a significant transition in Japan’s seasonal weather patterns. As these areas house critical infrastructure and dense urban populations, the shift to clear skies has immediate implications for daily operations and public safety protocols.