A developing low-pressure system brought the strongest winds of the year to the Kanto region and other wide areas of Japan on Monday [1].

The timing of the "May storm" is particularly significant as it coincides with the latter half of Golden Week, one of Japan's busiest holiday periods when millions of people travel across the country [1].

Weather stations recorded significant gusts across the region. In Chiba City, the maximum instantaneous wind speed reached 28.5 m/s [2]. Meanwhile, Gotemba City in Shizuoka Prefecture recorded a maximum instantaneous wind speed of 26.9 m/s [2]. Both figures represent the highest wind speeds recorded so far this year for those locations [1].

An FNN report said the system has created a widespread impact, noting that the "May storm" has resulted in the strongest winds of the year across a broad area including Kanto [1].

The storm is expected to move further north and east. Forecasts indicate that Hokkaido, Tohoku, and Hokuriku may experience maximum instantaneous wind speeds of up to 30 m/s [2].

An FNN report said these forecasted speeds are comparable to the intensity of a typhoon and could lead to severe wind damage in those northern regions [1]. Local authorities are monitoring the system as it spreads across the country.

“The maximum instantaneous wind speed reached 28.5 m/s in Chiba City.”

The occurrence of typhoon-level winds during the Golden Week holiday increases the risk of transport disruptions and accidents, as high volumes of domestic tourism often lead to crowded transit hubs and roads. Because these are the strongest winds recorded this year, the event may signal an unusually volatile spring weather pattern for the archipelago.