Passengers Hospitalized Following Spraying Incident on JR East Train
A sudden emergency on the Ueno-Tokyo Line led to the hospitalization of several passengers on Sunday afternoon, following reports of an unknown substance being sprayed inside a train car. The incident triggered an immediate response from railway officials and emergency services, resulting in localized service disruptions.
Details of the Incident
The event occurred at approximately 4:35 p.m. On May 10 on the Tokaido Line section of the Ueno-Tokyo Line, operated by East Japan Railway Co. (JR East). According to reports from Japan News/ANN, the train had originated from Odawara Station in Kanagawa Prefecture and was bound for Takasaki Station in Gunma Prefecture.
The situation escalated when an emergency report was filed stating that something had been sprayed within one of the train cars. To address the emergency and facilitate medical intervention, the train stopped at Kawasaki Station to offload the affected individuals.
Impact on Passengers and Public Health
About 10 passengers were taken to the hospital for treatment following the spraying incident. While the passengers were transported for medical evaluation, the exact extent of the damage or the nature of the substance used has not been immediately available.
Service Disruptions and Railway Response
JR East acted quickly to manage the fallout of the incident. The affected train suspended its service upon arriving at Kawasaki Station. To minimize the impact on other commuters and maintain network flow, subsequent trains were rerouted to operate using Yokosuka Line tracks.

Key Takeaways
- Incident Type: Emergency report of an unknown substance sprayed in a train car.
- Location: Tokaido Line section of the Ueno-Tokyo Line, stopping at Kawasaki Station.
- Casualties: Approximately 10 passengers hospitalized.
- Route: Odawara Station (Kanagawa) to Takasaki Station (Gunma).
- Operational Impact: Service suspended at Kawasaki Station with rerouting via Yokosuka Line tracks.
Looking Forward
Authorities and JR East are expected to investigate the cause of the spraying incident and identify the substance involved. Commuters are advised to monitor official JR East updates for any further changes to service schedules on the Ueno-Tokyo and Yokosuka lines as the investigation continues.