Power outage hits about 10,000 homes in Mie Prefecture, Japan

Oct 2026Published 29 Oct 2026Responsible editor: Chief Editor

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From the recordRoot cause Failed part What the record holds

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Companies named in the reporting of this entry (being named is not a finding of fault): Chubu Electric Power Grid

What happened

At about 9:50 am on 28 October 2026, roughly 10,000 homes were left without power in western Yokkaichi, parts of Komono and parts of Suzuka in Mie Prefecture. According to Chubu Electric Power Grid, based in Nagoya, the outage was caused by a work error during equipment replacement work at a substation. Power was fully restored after about five minutes. The source, published by Chunichi Shimbun, does not name the substation, the contractor or the specific error made during the work.

Contributing factors

A work error during substation equipment replacement works. The source gives no further detail on how the error occurred.

Lessons learned

Switching and isolation steps during substation equipment replacement should be checked independently before work begins and before power is restored.
Live-work plans should record the exact sequence of isolation, earthing and reconnection so that a single error does not interrupt supply to a large number of customers.
Fast restoration procedures, such as those that restored supply here in about five minutes, reduce customer impact when a work error does occur.

More lessons on electrical protection and isolation, worker safety and safe systems of work, from every incident on the register.

Source

chunichi.co.jp

Published 2026-10-29. Written from public reporting. Descriptive, not investigative. See the data accuracy disclaimer.

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The record behind this entry

The record behind EIR-2608 holds the operator, the root cause and what failed as fields you can filter, count and export, with its source and their verification status. The cause is not hidden: the contributing factors above give it as the sources report it. The record adds it as a field. Companies are named in the roles the sources give them. Being named is not a finding of fault.

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