Train service on the Shonan-Shinjuku Line was temporarily halted Saturday after a fallen tree struck a train in Tokyo [1].

The incident disrupted a critical transit artery during the evening commute, causing significant delays for thousands of passengers traveling through the city's northern wards.

According to East Japan Railway Company, a train operating between Ikebukuro and Akabane stations stopped after the driver noticed an unusual noise [2]. The disruption occurred near JR Oji station in Tokyo's Kita ward [3]. Investigators determined that a tree had either fallen or was leaning onto the tracks, making contact with the vehicle [1, 4].

Service was suspended starting at approximately 5 p.m. [3]. The halt prompted immediate safety checks by railway personnel to ensure the tracks were clear, and the train remained structurally sound. The line eventually resumed operations at 7:05 p.m. [1].

Railway officials estimated that the two-hour delay affected approximately 20,000 passengers [1]. The impact was felt across the Shonan-Shinjuku Line, which serves as a vital link connecting the western suburbs and the center of the capital.

JR East said the train stopped because of the unusual noise heard while traveling between the two stations [2]. No injuries were reported in the dossier regarding the contact between the vegetation and the train carriage.

Approximately 20,000 passengers were affected

This incident highlights the vulnerability of Tokyo's dense rail network to environmental interference. While the service was restored within two hours, the impact on 20,000 commuters demonstrates how a single localized obstruction can create a ripple effect across the metropolitan transport system during peak hours.