East Japan Railway suspended all service on the Keihin-Tohoku Line on Wednesday morning after a fallen tree damaged overhead wires between Kamata and Tamachi stations, stranding commuters on one of Tokyo’s busiest north-south corridors.
JR East said the obstruction was reported around 6:57 a.m. in the segment between Kamata and Tamachi on the line that links Saitama, central Tokyo and Yokohama. The operator halted trains on the entire line and said it had no estimate for when service would resume.
How the morning commute unraveled
The Keihin-Tohoku Line carries office workers and students through wards such as Shinagawa, Hamamatsucho and Ueno. Suspension at the peak of the Wednesday rush forced passengers onto the Yamanote Line, Tokyo Metro and bus routes that were already crowded after days of strong winds across eastern Japan.
Station staff directed riders to alternate lines, but social media posts showed platforms backing up at Omiya, Ueno and Shinagawa as travelers tried to reach offices that have largely ended pandemic-era remote-work defaults.
What JR East has confirmed
In its traffic information bulletin, JR East attributed the stoppage to “overhead equipment trouble” caused by a fallen tree. Repair crews must remove the tree, inspect damaged catenary and test power before trains can run again at normal speeds.
The company urged passengers to check its website and mobile app for updates rather than waiting on platforms, warning that partial reopenings could involve shuttle buses or severe crowding on parallel lines.
Wind damage beyond the capital
The same weather system that toppled the tree has disrupted other JR East routes. The operator reported delays and cancellations on Ou, Uetsu and Gono lines in northeastern Japan, affecting limited expresses such as Inaho and Resort Shirakami.
Meteorological agencies had warned of strong gusts as a cold front crossed the archipelago, following a typhoon season that has already stressed rail infrastructure on Kyushu and the Pacific coast.
Separate fatal crash on Odakyu
Hours earlier, on Tuesday night, a light vehicle entered the tracks on the Odakyu Enoshima Line in Fujisawa, Kanagawa Prefecture, and was struck by a train, killing the elderly driver, according to NHK. Police are investigating whether the car drove along the rails before the collision. No passengers were reported injured on the train.
While unrelated to the Keihin-Tohoku suspension, the Fujisawa crash underscored safety risks at grade crossings and unauthorized track incursions as operators race to restore normal schedules.
What riders should expect
Until JR East clears the tree and re-energizes the line, travelers between Yokohama and northern Tokyo should plan extra time and consider remote work if possible. Employers in the Marunouchi and Otemachi districts said they would tolerate late arrivals tied to the disruption.
Officials have not said whether compensation tickets will be offered; Japan’s rail companies typically issue delay certificates for commuters who need proof for employers.