Serious incidents and transport disruptions, including the collapse of electrification poles and the severing of overhead lines
First written in FY2016. 19 of 19 entries say "Materialised", first in FY2016. Latest entry: FY2026.
No other company in this theme has enough history to compare yet.
- FY2026MaterialisedAnnual report
「During the fiscal year under review, we experienced a transport disruption caused by an overhead line breakage at Shimbashi Station on the Yamanote Line in May 2025 and a train failure involving the E8 series of the Yamagata Shinkansen in June. In January 2026, and again in February, we experienced large-scale transport disruptions caused by power outages on the Yamanote, Keihin-Tohoku and Joban lines, and on the Utsunomiya Line, respectively.」
The report stated that multiple new transportation disruptions had occurred, including overhead wire breakages, rolling stock failures, power outages and large-scale transportation disruptions. - FY2025MaterialisedAnnual report
「During the fiscal year under review, in addition to two incidents in which a coupling separated while the Tohoku Shinkansen was in motion, causing the train to stop, it was discovered that the press-fitting force values used in wheelset assembly work had been handled improperly. These matters caused considerable inconvenience and concern to customers and other stakeholders.」
Two incidents occurred in which a coupling separated while the Tohoku Shinkansen was in motion, causing the train to stop, and were disclosed as new major incidents. - FY2022MaterialisedAnnual report
「In addition, following the earthquake off the coast of Fukushima Prefecture on 16 March 2022, the Tohoku Shinkansen sustained damage to rolling stock and facilities, forcing the suspension of operations on some sections. Although this caused inconvenience to customers, all personnel worked together on recovery efforts, and operations resumed across the entire line on 14 April.」
The earthquake off the coast of Fukushima Prefecture caused damage to Tohoku Shinkansen rolling stock and facilities and the suspension of operations on some sections. Operations resumed across the entire line on 14 April 2022. - FY2020MaterialisedAnnual report
「As a measure addressing the rolling stock failure at Fukushima Station on the Tohoku Shinkansen during Golden Week in 2019, the company replaced rolling stock components. As a measure addressing the substation trouble on the Joetsu Shinkansen, it also changed the control system program.」
Rolling stock failures occurred on the Tohoku Shinkansen and substation trouble occurred on the Joetsu Shinkansen, prompting component replacements and control system program changes. - FY2020-Q2MaterialisedAnnual report
「As a measure addressing the opening of a train door while in motion between Sendai and Shiroishizao on the Tohoku Shinkansen in August 2019, the company began modifications including adding a function to automatically detect the status of the door cock on rolling stock.」
A new major incident involving a train door opening while in motion occurred on the Tohoku Shinkansen, prompting the company to begin measures including the addition of a function to automatically detect the status of the door cock. - FY2020-Q1MaterialisedAnnual report
「As a measure addressing the rolling stock failure at Fukushima Station on the Tohoku Shinkansen during Golden Week in 2019, the company replaced rolling stock components. As a measure addressing the substation trouble on the Joetsu Shinkansen, it also changed the control system program.」
New transportation and equipment disruptions occurred, including the rolling stock failure at Fukushima Station on the Tohoku Shinkansen and the substation trouble on the Joetsu Shinkansen, prompting component replacements and program changes. - FY2019MaterialisedAnnual report
「In particular, for transportation disruptions on the Shinkansen, conventional lines in the Tokyo metropolitan area and elsewhere, the company analyzed the causes and steadily advanced measures to prevent recurrence.」
The report described measures to prevent recurrence following transportation disruptions and equipment accidents, including the Tohoku Shinkansen rolling stock failure, the Niigata substation fire and the Central Line cable fire. - FY2019-Q3MaterialisedAnnual report
「In light of the transportation disruption caused by a rolling stock failure on the Tohoku Shinkansen in December 2018, the company began further enhancing multilingual guidance.」
A new transportation disruption caused by a rolling stock failure occurred on the Tohoku Shinkansen, prompting the company to begin enhancing multilingual guidance. - FY2019-Q2MaterialisedAnnual report
「In light of the transportation disruption caused by smoke in the track area between Shin-Kiba and Kasai-Rinkai-Koen stations on the Keiyo Line in September 2018, the company advanced consideration of work methods for early recovery.」
A new transportation disruption caused by smoke in the track area occurred on the Keiyo Line, prompting consideration of work methods for early recovery. - FY2019-Q1MaterialisedAnnual report
「Taking seriously the considerable inconvenience caused to many customers by the rolling stock failure between Sendai and Furukawa on the Tohoku Shinkansen in June 2018, the company strengthened its systems for the early recovery of failed rolling stock and flexible turnback operations.」
A new transportation disruption caused by a rolling stock failure occurred on the Tohoku Shinkansen, prompting efforts to strengthen systems for the early recovery of failed rolling stock and turnback operations. - FY2018MaterialisedAnnual report
「Taking seriously the transportation disruptions that caused considerable inconvenience to many customers, including the power outage at the Warabi AC substation, the electrical equipment failure at Higashi-Washimiya Station on the Utsunomiya Line and the overhead wire breakage between Kawasaki and Tsurumi stations on the Keihin-Tohoku Line since September 2017, the company conducted emergency inspections of the relevant equipment and, in cooperation with group companies, partner companies and others, worked to assess the actual conditions of railway-related construction and work and to reinforce the relevant rules and procedures. In light of the prolonged stoppage between stations on the Shinetsu Main Line caused by heavy snowfall in January 2018, the company also worked to clarify chains of command and centralize information management during transportation disruptions.」
In addition to existing incidents such as the power outage at the Warabi AC substation, an overhead wire breakage and a prolonged stoppage between stations caused by heavy snowfall occurred. This led to emergency inspections, renewed reinforcement of the relevant rules and procedures, and reviews of chains of command and information management during transportation disruptions. - FY2018-Q3MaterialisedAnnual report
「Taking seriously the transportation disruptions caused by the power outage at the Warabi AC substation and the electrical equipment failure at Higashi-Washimiya Station on the Utsunomiya Line since September 2017, the company conducted emergency inspections of the relevant equipment and, in cooperation with group companies, partner companies and others, worked to assess the actual conditions of railway-related construction and work and to reinforce the relevant rules and procedures.」
In addition to the power outage at the Warabi AC substation, transportation disruptions occurred because of the electrical equipment failure at Higashi-Washimiya Station on the Utsunomiya Line and other incidents, prompting emergency inspections and renewed reinforcement of the relevant rules and procedures. - FY2018-Q2MaterialisedAnnual report
「In light of the transportation disruption caused by a power outage at the Warabi AC substation in September 2017, the company began working with group companies, partner companies and others to assess the actual conditions of railway-related construction and work and to reinforce the relevant rules and procedures.」
A transportation disruption caused by a power outage at the Warabi AC substation actually occurred, prompting work to assess the actual conditions of construction and work and to reinforce the relevant rules and procedures. - FY2017MaterialisedAnnual report
「In light of the railway personal-injury accident that occurred in the premises of Warabi Station on the Keihin-Tohoku Line in January 2017, the company announced that the planned implementation schedule would be brought forward.」
A new transportation accident occurred, leading to the acceleration of safety measures. - FY2016MaterialisedAnnual report
「In light of the major incident in April 2015 in which an electrification pole fell between Kanda and Akihabara stations on the Yamanote Line and obstructed the track, a review committee chaired by the head of the Railway Operations Headquarters was established within the Railway Safety Promotion Committee to prevent such an incident from happening again.」
The report stated that transportation disruptions had also occurred on the Tohoku Shinkansen, Negishi Line and Takasaki Line, and that measures were being advanced to prevent recurrence and avert incidents before they occurred.