Typhoon No. 6 brought intense rainfall and strong gusts to Japan's Kanto region, prompting evacuation orders for over 1.6 million people [1].

The scale of the evacuations reflects the severe risk of flash flooding and landslides in densely populated areas. As rivers swelled and roads became impassable, local authorities moved to prevent mass casualties in one of the world's most urbanized regions.

Heavy rain caused widespread road flooding and river swelling across several prefectures. Some waterways, including the Nogawa, Meguro, and Zenpukuji rivers, reached flood-danger water levels [1]. In Tokyo, the impact was visible in areas such as Setagaya and Meguro, while the Tama River also saw significant rising levels [1].

Reporting from the ground highlighted the severity of the conditions. A reporter from TBS NEWS DIG said, "The Tama River's riverside golf practice range is flooded due to the heavy rain."

The storm's impact extended beyond the capital to Yokohama, Kawasaki, and Ibaraki. In the coastal area of Izu Ōshima, strong winds battered the shoreline. A reporter said, "White waves are crashing against the quay."

Wind speeds remained a primary concern even as precipitation subsided. In Shido City, the maximum instantaneous wind speed was recorded at 22.8 m/s [2]. In Yokohama, a reporter at JR Sakigicho Station said, "The wind is strong, and rain hitting the ground is being swept away."

Authorities warned that the danger persisted after the rain stopped due to these lingering strong winds. The storm affected a wide swath of the Kanto region, leaving officials to monitor river levels and infrastructure stability [1, 2].

“Evacuation orders issued for over 1.6 million people in the Kanto region”

The massive evacuation order for 1.6 million people underscores the vulnerability of Japan's Kanto region to extreme weather. Because this region includes Tokyo and surrounding urban centers, even moderate river swelling can lead to catastrophic urban flooding. The persistence of high wind speeds after the rain stopped indicates a complex storm system that requires prolonged vigilance from emergency services to prevent secondary accidents.