Heavy rain is expected to hit regions from western Japan to Kanto-Koshin on July 2, 2026 [1].
The forecast signals a period of high risk for flooding and landslides across several prefectures. This weather pattern is driven by the Meiyu front, which is expected to become more active and stall over the region [1].
According to TBS NEWS DIG, the storm system will bring intense rain accompanied by thunder from Kanto to the west [1]. Meteorologists expect rainfall levels to reach 150 mm in Kyushu [1] and 100 mm in the Kanto-Koshin region [1]. These amounts are described as locally reaching warning-level precipitation [1].
Beyond the immediate front, weather officials are monitoring the southern ocean near the Marshall Islands. Two tropical depressions are currently moving northward and may intensify [1]. If these systems develop, they will be designated as Typhoon 9 and Typhoon 10 [1].
"Tropical depressions are likely to approach from the south," said meteorologist Junko Miyake [1].
An announcer for TBS NEWS DIG said the Meiyu front will move north, bringing a risk of heavy rain and thunder to the areas between Kanto and western Japan [1]. The announcer said that rainfall in Kyushu and Kanto-Koshin is expected to reach levels that trigger official warnings [1].
Local authorities are advising residents to monitor weather updates as the front stalls. The combination of the stationary Meiyu front and the northward movement of tropical systems often creates a volatile environment for precipitation in the Japanese archipelago [1].
“Expected rainfall is 150 mm in Kyushu and 100 mm in Kanto-Koshin.”
The simultaneous presence of a stalled Meiyu front and developing tropical depressions creates a compounding weather risk. When tropical moisture feeds into a stationary front, it can lead to prolonged, intense rainfall that exceeds standard seasonal expectations, increasing the likelihood of flash floods and landslides in mountainous terrain.
