Overview

• Around 11:04 p.m. on Oct. 5, a local train entering Kajigaya struck a stopped out‑of‑service train protruding from a siding, causing a partial derailment with no injuries to 149 passengers or five staff.
• After a daylong shutdown on Oct. 6, Tokyu began restoring service late that night, with full‑line operation resuming from the first trains on Oct. 7 at reduced frequency and with possible delays.
• Tokyu reported 1,107 cancellations affecting about 652,000 riders, with long bus lines and crowded pedestrian routes during the suspension.
• Officials are examining why automatic train control apparently did not stop the approaching train and why an overrun‑prevention signal triggered as the out‑of‑service train halted short of its mark.
• The out‑of‑service train was driven by a trainee accompanied by a driver and conductor; MLIT ordered Tokyu to identify causes and preventive measures, and the Transport Safety Board sent investigators to the site.