Heavy Rain Warning for Osaka and Kyoto Today

Osaka and Kyoto are approaching the peak of heavy rainfall on September 9, 2026, with forecasters warning that conditions will intensify through the morning and remain dangerous until early afternoon.

Weather forecaster Mayumi Tanaka of Weathernews said there is a risk of a linear rainband developing over the Kinki region today. A linear rainband is a series of successive thunderstorm cells that remain stationary or move slowly over the same area, producing intense and prolonged rainfall that can lead to severe flooding.

The report indicates that Osaka and Hyogo are likely to experience the heaviest rain around midday, while the Tokai region faces a similar risk of a linear rainband forming in the evening or late at night. The Kanto region, further east, could also see intense rainfall late at night, according to the forecast.

Weathernews has urged residents in the affected areas to avoid cliffs and riverbanks, as saturated ground caused by prolonged heavy rain increases the likelihood of landslides and sudden rises in river levels.

The advisory also specifically warns against approaching underpasses, low-lying roads that dip beneath other roads or railway lines. These structures are notoriously prone to rapid flooding during intense downpours, and vehicles or pedestrians can become trapped within minutes as water accumulates.

Given the unpredictable nature of linear rainbands, which can intensify with little advance warning, Weathernews has recommended that people in the Kinki, Tokai and Kanto regions monitor weather advisories frequently throughout the day rather than relying on a single forecast check.

The warning reflects a broader pattern seen in recent years, where sudden and highly localized bands of extreme rainfall have caused significant flooding and infrastructure damage across various parts of Japan during the summer and early autumn months.