Strong winds swept across Japan on Monday, part of the Golden Week holidays, disrupting transport services and prompting weather warnings throughout the nation as a rapidly developing low-pressure system moved eastward across the country.

The Meteorological Agency said the system, accompanied by a front, intensified as it moved over the Sea of Japan, bringing bands of heavy rain and gusty conditions from western Japan into the Kinki and Kanto-Koshin regions from late Sunday through Monday morning.

Gusts reached near-gale or gale-force levels in multiple areas. Maximum instantaneous wind speeds of 28.5 meters per second?(102 kilometers per hour) ¡ª a speed at which it is difficult for a person to stand without holding onto something, according to the Meteorological Agency ¡ª were recorded in the city of Chiba shortly after 6 a.m., while Gotemba in Shizuoka Prefecture saw gusts of 26.9 meters per second and Yokohama recorded 24.7 meters per second.

Rainfall totals were also significant, particularly in mountainous regions. Mount Ontake in Nagano Prefecture recorded 148.5 millimeters in the 12 hours through 1 p.m., while Mount Takane in Fujieda, Shizuoka Prefecture, logged 127.5 millimeters by 1 p.m. raising the risk of localized flooding and landslides.

Services on the Tokyo Bay Aqua-Line were?partially suspended starting at 4 a.m., with closures affecting southbound lanes between Kawasaki Ukishima Junction in Kanagawa Prefecture and Kisarazu Kaneda Interchange in Chiba Prefecture, as well as northbound lanes between Sodegaura Interchange and Kawasaki Ukishima Junction.

According to Odakyu Electric Railway, the Odakyu Odawara Line suspended service in both directions between Hadano Station and Odawara Station in Kanagawa Prefecture due to strong winds blowing debris onto the tracks. Services partially resumed Monday.

Ferry operations on the Tokyo Bay Ferry, which connects Kurihama Port in Yokosuka, Kanagawa Prefecture, and Kanaya Port in Futtsu, Chiba Prefecture, were also halted from the first departure due to strong winds and high waves.

The music festival Japan Jam 2026, scheduled to be held at Soga Sports Park in the city of Chiba, canceled its Monday performances, citing safety concerns due to the strong winds.

The low-pressure system is expected to continue intensifying as it moves toward waters near the Kuril Islands by Monday night. Strong winds are forecast to persist across eastern and northern Japan, with the risk of gusts reaching warning levels of around 30 meters per second in the Hokuriku and Tohoku regions and Hokkaido.

The agency urged residents, particularly along the Pacific side of the Tohoku region, to remain on alert for violent winds from Monday evening through the late night, warning that conditions could disrupt transport further and pose risks via flying debris and hazardous seas.