An active cold front brought heavy rain to Niigata Prefecture on the Sea of Japan coast Saturday morning, with hourly precipitation of 80 mm recorded in the towns of Nou and Kanose.
The Meteorological Agency issued severe thunderstorm warnings for the Kanto area around midnight Saturday.
Precipitation also reached 71 mm in Tokamachi and 60 mm in Kamikawa in the prefecture.
The torrential rain suspended operations of JR Joetsu bullet trains between Echigoyuzawa and Urasa at around 8:20 a.m. for some 70 minutes, causing the cancellation of five runs and delays of up to 78 minutes for 12 other trains.