The 1982 Nagasaki flood (Japanese: 長崎大水害) was caused by a cloudburst that occurred mainly in Nagasaki, Japan in July 1982.
On July 23, 1982, due to the influence of the Meiyu front, a cloudburst occurred around Nagasaki.[1][2] Due to this cloudburst, mudflows and rivers overflowed their banks in quick succession.[3][4]
Throughout the Nagasaki area, following rainfall observed at 100 to 187 mm a per hour, as well as landslides throughout the area. According to the Japanese government report, 299 people died in Nagasaki Prefecture, along with 23 in Kumamoto Prefecture.[5]
The Japan Meteorological Agency named the heavy rain from July 23 to July 25 the "July 1982 heavy rain" (昭和57年7月豪雨).[6][7] On the other hand, Nagasaki Prefecture named this disaster the "7.23 Nagasaki Flood" (7.23長崎大水害).[8]