JMA Announces Start of Rainy Season in Kanto‑Koshin and Tokai Regions

The Japan Meteorological Agency (JMA) issued an official notice today. It confirmed that the rainy season has begun in the Kanto‑Koshin area. The same seasonal shift also applies to the Tokai region. The announcement follows the typical onset of the plum‑rain period. Residents in the affected prefectures are advised to expect prolonged rainfall. Authorities recommend preparing flood‑control measures and staying alert. The start of the season may impact transportation and outdoor activities. Weather services will continue monitoring precipitation levels throughout the period.