A severe flood in Japan from September 2 to September 9, 2026, resulted in one death and displaced over 3,300 people. The flooding affected multiple regions, causing significant disruption.

Historically, Japan has faced recurrent flooding due to its geography and climate patterns. This event highlights the vulnerability of urban areas to extreme precipitation events, leading to riverine flooding.

The socio-economic fallout includes damage to infrastructure and agricultural losses, exacerbating long-term challenges such as fluvial flooding risks and the need for improved disaster preparedness.