Frequency of more than 50 mm per hour rainfall Japan 2014-2023
In 2023, heavy rainfall of more than 50 millimeters per hour occurred 326 times in Japan. The figure decreased compared to 382 times in the previous year, when it was the highest frequency of the past decade.
Most of the rainfall in Japan occurs during the rainy season, which lasts from early June to mid-July. Heavy rain is often caused by typhoons, which develop over the Pacific Ocean and regularly approach the archipelago between July and October.