Key Facts
• In September 2024 and March 2025, two coupling failures occurred on the Tohoku Shinkansen.
• The incidents involved the “Hayabusa” and “Komachi” trains, leading to emergency stops.
• Both trains used the same control panel, suspected of malfunctioning and sending separation signals.
• East Japan Railway Company (JR East) announced plans to modify the system to prevent future issues.
• System upgrades are expected to be completed soon to ensure safety during operation.
Summary
The Tohoku Shinkansen experienced two coupling failures in September 2024 and March 2025, involving the “Hayabusa” and “Komachi” trains. Both incidents were linked to the same control panel, which likely malfunctioned and sent signals to separate the cars. East Japan Railway Company (JR East) has acknowledged the issue and is working on system modifications to prevent such occurrences during operation. The upgrades are expected to be completed shortly, ensuring enhanced safety for future train operations.
