Record-breaking rain has battered Japan, sending rivers surging over their banks. The Kinugawa River broke through a breakwater, sending a wall of water into Joso, about 50 kilometres north of Tokyo.
A man in his 70s is believed to have been trapped in his house as it was swept away, NHK national television said. Japanese military helicopters plucked residents from their rooftops, but rescue officials said they were unable to keep up with the pleas for help.
Part of a hotel in Nikko, a tourist spot popular with foreign tourists, collapsed.
Part of a hotel building falls into the floodwaters at Nikko mountain resort in Tochigi prefecture, north of TokyoJiji Press/AFP
At least two people are reported missing and scores are stranded in flooded homes. Some 100,000 have been evacuated across a wide swathe of the country.
"Rare weather warnings" were issued for five million people in eastern Japan, where some areas received more than twice their usual monthly September rain in just 48 hours. The rains came on the heels of Tropical Storm Etau, which caused flooding and landslides.
People wait for to be rescued from vehicles as they are stranded on a road flooded by the Kinugawa river in Joso, Ibaraki prefectureKyodo/ReutersLocal residents are rescued from their flooded home by helicopterJiji Press/AFPOne man sits on the roof of a car while another clings to a utility pole in JosoKyodo/ReutersA local resident is rescued by a helicopter of the Gound Self Defence ForceJiji Press/AFPA man wades through deep floodwaters in Joso after the Kinugawa river burst its banksIssei Kato/ReutersRaging floodwaters rush down a road in JosoIssei Kato/ReutersA woman is rescued by police officers from a residential area in Joso, Ibaraki prefectureKyodo/ReutersA resident of Joso is rescued by a Japan Self-Defence Force helicopterIssei Kato/ReutersA family wades along a flooded road in Joso, Ibaraki prefectureIssei Kato/ReutersA man carries a suitcase through floodwaters in Oyama, Tochigi prefectureYoshikazu Tsuno/AFPPeople wait to be rescued from the roof of their homeJiji Press/AFPRescue workers transport evacuees in a rubber dinghy through floodwaters in Oyama, Tochigi prefecture, north of TokyoYoshikazu Tsuno/AFPA man wades through a local shopping area flooded by the Kinugawa river, in Joso, Ibaraki prefectureIssei Kato/ReutersA woman on a stretcher talks to a Japan Self-Defence Force member after being rescued by helicopterIssei Kato/Reuters
Rainfall reached 600mm (24 inches) in one part of Ibaraki prefecture, where Joso is located, and the Japan Meteorological Agency warned of at least 200mm more in parts of eastern Japan, including Fukushima, site of the reactor crippled by the March 2011 tsunami, before the rain is predicted to stop