The Meteorological Agency is warning that floods and landslides might hit western and eastern Japan this weekend as a rain front and low pressure system envelop a large portion of the archipelago.
Some regions will experience very heavy rain, including thunderstorms, through Sunday, the agency said.
The Tokaido bullet train line was temporarily suspended for about half an hour between Toyohashi and Mikawaanjo in Aichi Prefecture on Saturday morning by heavy rain.
Up to 250 mm of precipitation is projected for the Tokai region in the 24-hour period through 6 a.m. Sunday, with 200 mm projected for Shikoku. Up to 180 mm is projected in Kansai, while up to 120 mm is expected in the Hokuriku and Kanto-Koshin regions and southern Kyushu.