Typhoon No. 7 is approaching the Kanto and Tokai regions, bringing a second peak of heavy rainfall to eastern Japan this Saturday [1].

The storm's proximity increases the risk of flash flooding and landslides in densely populated areas, forcing local authorities to issue high-level emergency alerts.

Meteorologist Tezuka said that rain is expected to intensify from 1 p.m. onward [2]. The storm is moving north from the waters off the coast of Shikoku, carrying significant cloud cover toward the mainland [1].

Emergency services have issued Level 4 landslide danger warnings for Chiba and Kanagawa prefectures [3]. These warnings indicate a high risk of slope failure and mudslides, urging residents in vulnerable areas to take immediate precautions.

Weather models suggest the most intense rain clouds will pass over the Izu Peninsula and Boso Peninsula between 4 p.m. and 6 p.m. [2]. This window represents the period of closest approach for the system, which may lead to severe weather conditions across Shizuoka and neighboring prefectures [1].

Local officials are monitoring river levels and soil saturation as the storm progresses. The combination of previous rainfall and the current peak increases the likelihood of ground instability, a primary driver for the current Level 4 alerts [3].

“Rain is expected to intensify from 1 p.m. onward”

The issuance of Level 4 warnings indicates that the storm is not merely a weather inconvenience but a significant geological threat. Because these alerts are targeted at Chiba and Kanagawa, the focus is on preventing casualties from landslides in areas where the soil has already been weakened by earlier rain.