Japan Meteorological Agency issues heavy rain warning for Shikoku
Authorities warn of high probability of intense rainfall within three hours as Typhoon No. 6 continues to impact the region.
The Japan Meteorological Agency (JMA) issued an immediate prediction for a line-shaped precipitation band at 8:53 pm on June 2, 2026, citing an increased likelihood of formation within three hours. The warning specifically applies to central and western Kochi Prefecture and northern Tokushima Prefecture, areas currently under the influence of severe weather systems.
According to the JMA, the phenomenon is defined as a series of developing cumulonimbus clouds aligning to bring heavy rain. The agency’s assessment indicates a high probability that these conditions will materialise in the specified regions, prompting urgent attention from local authorities and residents.
This meteorological alert follows a period of significant weather volatility across Japan. Earlier in May, Typhoon No. 6 approached Okinawa and the Amami Islands with violent winds. Subsequent forecasts highlighted concerns regarding heavy rain extending from Kyushu to the Kanto and Chubu regions, alongside widespread heat exceeding 30 degrees Celsius in late May.
The JMA’s definition of a line-shaped precipitation band underscores the potential for prolonged and intense rainfall. While the immediate prediction focuses on the three-hour window, the agency has not specified the potential intensity of the rainfall or the likelihood of secondary disasters such as flooding or landslides.
Uncertainty remains regarding the exact onset time of the heavy rain within the designated window, as the warning denotes a high probability rather than a certainty. Furthermore, the extent to which the precipitation band will persist beyond the initial three-hour period has not been detailed in the immediate prediction.
As of the latest update from NHK News Japan at 21:31 on June 2, 2026, no further specifics on rainfall volume or duration have been provided. Residents in the affected areas are advised to monitor official updates as the situation develops.
