Skip to content
JAENES
BPossible leakOctober 26, 2026 announced

中部電力Data breach / unauthorized access incident

笹尾 祐太朗の写真Reviewed by Yutaro SasaoWritten by Leak Watch editorial team published ・ updated
Occurred on
Unconfirmed
Announced on
October 26, 2026
Severity
BIncidents centered on names and contact details.
Scale
324 people
Main impact
Names and email addresses of 324 event newsletter subscribers may have been leaked due to unauthorized third‑party access. It was announced there is no impact on the electric power business.
Information involved
Email addressFull name
Cause / key point
Unauthorized third‑party access to the system 「ブラストメール」 used by an external vendor to distribute the newsletter.
Industry
Services & other
Listing / capital
Listed company9502
Sources
Last updated
October 27, 2026

Stock price reaction to the disclosure中部電力 9502

2026.10.06 〜 2026.10.27Loading…

Stock information is reference data based on Yahoo Finance and may be delayed. This site does not solicit or advise investment and does not guarantee the accuracy or completeness of this information. We accept no liability for any investment decision based on it.

Where to go for this information

The steps themselves are on the protection guide. These links match the kinds of data in this incident, plus support contacts.

Ask AI about this incident

Opens an AI chat with this page's URL already in the prompt. Treat the answer as a starting point — always verify with the official sources listed above.

Ask ChatGPT ↗Search Perplexity ↗

Email addressFull nameHow severity is assessed →

Is this incident worth paying attention to?

Written & reviewed

笹尾 祐太朗の写真

Reviewed byYutaro SasaoFounder & CEO, MediaLeap Inc.

CEO of MediaLeap Inc. Working on both sides of web advertising and web media since 2013; founded the company in May 2025.

Review scope: cross-checking against primary sources (official and government announcements), verifying claims stay within the facts, and checking source attribution。Last reviewed:

Written by:Leak Watch editorial team (AI-assisted drafts verified against sources by the editorial team) · Reviewer profile · Request a correction

Related incidents

Browse the database →

Incidents sharing the same company, service, attack method or industry (grouped automatically from the disclosures).

Other incidents at 中部電力

Incidents related to "イベント"

Incidents where the damage spread through the same service or system.

Incidents related to "ブラストメール"

Incidents where the damage spread through the same service or system.

Same attack method

Same industry

Attack method classification: Unauthorized access (method undisclosed)(Breached, but the technique was not identified or disclosed)

Read the Unauthorized access (method undisclosed) guide and national trends →

← Back to Breach Watch