Weather officials are warning that more rain is expected to continue through Tuesday in eastern and northern Japan, raising the risk of flooding in areas hit by downpours from Typhoon Hagibis earlier this month.
The officials say a front and a low-pressure system from severe tropical storm Neoguri have created unstable atmospheric conditions in wide areas in the Kanto-Koshin and Tohoku regions.
More than 80 millimeters of rainfall in one hour pounded Miyakejima island in the Izu island chain early Tuesday. Intermittent rain is falling in wide areas.
The officials say rain will continue through the night as the front and the low-pressure system are moving north.
Precipitation may reach 100 millimeters in the 24 hours through Wednesday morning in the Kanto-Koshin region and the Izu Islands. The Tohoku region may have up to 80 millimeters in the same period.
The officials are calling on people to stay on the alert for possible flooding and landslides. They say lightning and tornadoes could also strike.
They are also urging caution over a very strong typhoon now near the Mariana Islands.
Typhoon Bualoi is expected to approach the Ogasawara Islands on Thursday, and will likely turn into a low-pressure system as it moves toward the sea east of Japan on Saturday.