East Japan Railway Company says one-third of its bullet trains used for the Hokuriku Shinkansen line have been damaged by flooding.
JR East says water entered a facility in Akanuma in Nagano Prefecture, central Japan. The Shinkansen carriage center is used to repair or store bullet trains.
Company officials say 10 trains, with a total of 120 carriages, have been confirmed damaged.
The damaged ones include eight E7 series trains and two W7 series trains, out of the 30 used for the Hokuriku line.
The officials say there are no prospects for the time being of fully resuming service on the Hokuriku line. They say they may have to restart operation with fewer trains.
The center is located 10 kilometers northeast of JR Nagano Station and on the west side of the Chikuma River, which overflowed after Typhoon Hagibis hit the area on Saturday.