Tokyo Metro to Remote and Implement CBM for Railway Substation and Electrical Room Maintenance Using Sensing and AI Technologies
Tokyo Metro is introducing Condition Based Maintenance (CBM) using sensing technology and AI to optimize maintenance operations for railway substations and electrical rooms. Verification will begin around Yoyogi Substation on the Chiyoda Line in FY2026, with horizontal expansion planned from FY2027. This initiative expects to enable early detection of failure signs, prevent occupational accidents, and reduce on-site inspection time by up to 60%.
📋 Article Processing Timeline
- 📰 Published: May 26, 2026 at 23:00
- 🔍 Collected: May 26, 2026 at 14:31
- 🤖 AI Analyzed: May 26, 2026 at 15:37 (1h 5m after Collected)
Tokyo Metro Co., Ltd. (Tokyo Metro) is working on Condition Based Maintenance (CBM) for railway substations and electrical rooms. This is part of the company's group medium-term management plan, "Run! Next Generation," which aims to evolve railway operations through new technologies and digital transformation (DX), with the goal of optimizing maintenance operations while considering safety, stability, and labor shortages.
To support safe transportation, Tokyo Metro has conducted periodic inspections primarily through on-site checks. However, to ensure sustainable railway business operations amid a declining labor population, the company is developing and introducing CBM in various fields of railway equipment to promote maintenance optimization (improving work efficiency and optimizing inspection cycles).
In this initiative, for railway substations and electrical rooms, the company will remotely acquire status data (video, temperature/humidity, partial discharge, dust, etc.) using various sensors, replacing traditional periodic on-site inspections by staff, thereby achieving high-frequency measurement and state monitoring. Furthermore, the data will be analyzed by AI (conducted on the data infrastructure "REFMa CoRE" currently under development) to analyze failure signs and optimize equipment replacement timing. The expected benefits are as follows:
- Early detection of failure signs through high-frequency monitoring of equipment status
- Significant reduction in hazardous work, such as risks of electric shock, and prevention of occupational accidents
- Reduction in inspection time due to decreased on-site work and travel via remote data acquisition (estimated reduction of up to approximately 60%)
In FY2026, Tokyo Metro will designate the area around Yoyogi Substation on the Chiyoda Line as a priority area for CBM and smart maintenance to advance various verifications. From FY2027 onwards, the company plans to roll out this initiative to other areas.
Tokyo Metro will continue to promote the "evolution of railway operations through the introduction of new technologies and DX" to further improve the safety and security of railway transportation.
To support safe transportation, Tokyo Metro has conducted periodic inspections primarily through on-site checks. However, to ensure sustainable railway business operations amid a declining labor population, the company is developing and introducing CBM in various fields of railway equipment to promote maintenance optimization (improving work efficiency and optimizing inspection cycles).
In this initiative, for railway substations and electrical rooms, the company will remotely acquire status data (video, temperature/humidity, partial discharge, dust, etc.) using various sensors, replacing traditional periodic on-site inspections by staff, thereby achieving high-frequency measurement and state monitoring. Furthermore, the data will be analyzed by AI (conducted on the data infrastructure "REFMa CoRE" currently under development) to analyze failure signs and optimize equipment replacement timing. The expected benefits are as follows:
- Early detection of failure signs through high-frequency monitoring of equipment status
- Significant reduction in hazardous work, such as risks of electric shock, and prevention of occupational accidents
- Reduction in inspection time due to decreased on-site work and travel via remote data acquisition (estimated reduction of up to approximately 60%)
In FY2026, Tokyo Metro will designate the area around Yoyogi Substation on the Chiyoda Line as a priority area for CBM and smart maintenance to advance various verifications. From FY2027 onwards, the company plans to roll out this initiative to other areas.
Tokyo Metro will continue to promote the "evolution of railway operations through the introduction of new technologies and DX" to further improve the safety and security of railway transportation.
FAQ
東京メトロが鉄道変電所の保守においてCBM化に取り組む目的は何ですか？
安全・安定性の向上、および労働力不足への対応として、保全業務の最適化（効率化・検査周期の適正化）を図るためです。
具体的にどのような方法で変電所の状態監視を行いますか？
各種センサを用いて映像、温湿度、部分放電、塵埃などの状態データを遠隔取得し、開発中のデータ基盤「REFMa CoRE」上でAI分析を行います。
この取り組みによってどのような効果が期待されますか？
故障予兆の早期把握、感電等の危険作業の削減による労働災害の防止、および現地作業・移動の減少による検査時間の最大約60%削減が期待されています。
検証のスケジュールはどうなっていますか？
2026年度に千代田線代々木変電所周辺で検証を行い、2027年度以降に他エリアへの水平展開を予定しています。
REFMa CoREとはどのようなものですか？
鉄道電気設備の稼働データ（電流・電圧・温湿度・振動など）を蓄積・分析するために現在構築中のデータ基盤です。