A low-pressure system is expected to bring strong rain and wind to Japan's Kanto region starting the evening of May 3 [1].
The timing of the storm coincides with Golden Week, one of Japan's busiest travel periods. Potential disruptions to major transport arteries, including the possible closure of the Aqua-Line, could impact millions of commuters and tourists moving through the region [1].
Rain clouds are forecast to begin covering Kanto at 7 p.m. on May 3 [1]. Northern Kanto is expected to experience heavy rain during the night of May 3, with the rain peak shifting to southern Kanto on the morning of May 4 [1]. Weather conditions are expected to improve by the afternoon of May 4 [1].
Strong winds accompanying the frontal passage are expected to generate hazardous conditions. These winds may disrupt regional transport and could lead to the closure of the Aqua-Line [1].
Before the system arrives, the region has experienced unseasonably warm weather. Tokyo temperatures reached close to 30 °C on May 2 [1]. Forecasters expect temperatures of 25 °C or higher to continue for several days [1].
Sunny weather is projected to return after May 5 [1]. The current weather pattern is driven by a low-pressure system and frontal passage bringing moisture from the west, which is causing the rain-cloud area to expand [1].
“Rain clouds are forecast to begin covering Kanto at 7 p.m. on May 3.”
The intersection of a significant weather event and Golden Week creates a high risk of logistical gridlock. Because the Aqua-Line is a critical link for traffic bypassing Tokyo, its closure would likely force commuters onto already congested surface roads, compounding the impact of heavy rain and wind on regional mobility.
