The biggest rainfall in 60 years is set to hit Japan as Typhoon Hagibis closes in on the island nation.
The powerful typhoon is forecast to bring two feet of rain and damaging winds to the Tokyo area over the weekend.
Japan's government warned people on Friday to stockpile supplies and evacuate before it became too dangerous.
The Rugby World Cup and other events were cancelled for Saturday, while flights and train services have been halted.
Meteorological Agency forecast department chief Yasushi Kajihara told a news conference: "In order to protect your own life and your loved ones, please try to start evacuating early before it gets dark and the storm becomes powerful."
Mr Kajihara said Typhoon Hagibis resembled the Kanogawa typhoon that hit the Tokyo region in 1958 with heavy rains and left half a million houses flooded.
More than 1,200 people died in that storm.
Prime Minister Shinzo Abe's Cabinet is to hold a disaster management meeting later on Friday.
"The government is doing the utmost to prepare for the approaching typhoon," disaster management minister Ryota Takeda told reporters, and urged people to prepare early and obtain food and water.
Economy Minister Isshu Sugawara urged hospitals and other public facilities to check their backup power.
