The Japan Meteorological Agency has issued the highest-level heavy rain emergency warnings to Tokyo and 11 other prefectures.
Earlier, the officials issued warnings for Tokyo and six prefectures, namely, Shizuoka, Kanagawa, Saitama, Gunma, Yamanashi and Nagano. Later they added five more prefectures, Ibaraki, Tochigi, Niigata, Fukishima and Miyagi..
The Japan Meteorological Agency issued the highest-level heavy rain emergency warnings at 3:30 p.m. on Saturday for Tokyo and 6 other prefectures in central and eastern Japan.
The designated areas are: Shizuoka Prefecture, Kanagawa Prefecture, Tokyo, Saitama Prefecture, Gunma Prefecture, Yamanashi Prefecture and Nagano Prefecture.
Tropical Storm Mitag turned into a low pressure system over the Sea of Japan Thursday afternoon. But Japan's Meteorological Agency is still warning of localized heavy rains across parts of western Japan as well as the eastern and northern part of the country, where the system is headed.
The low pressure system is moving east over the sea, accompanied by a front. It is making the atmosphere in wide areas from western to northern Japan unstable and generating rainclouds in some areas.
Japanese weather officials say severe tropical storm Tapah will bring violent winds and torrential rain to many parts of the country.
The Meteorological Agency estimates that as of 7 p.m. on Sunday, Tapah is over waters 80 kilometers north of Goto city, Nagasaki Prefecture. The storm was moving north-northeast at 30 kilometers per hour.