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JAENES
BPossible leakOctober 26, 2026 announced

古河電工パワーシステムズ株式会社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
October 14, 2026
Announced on
October 26, 2026
Severity
BIncidents centered on names and contact details.
Scale
Unknown
Main impact
Due to suspected unauthorized access to the shipping management web system, company names of orderers and product recipients, personal names, addresses, and phone numbers may have been exposed. Card or bank account information was not handled, and no misuse had been confirmed at the time of disclosure.
Information involved
Full nameHome addressPhone number
Cause / key point
The incident is attributed to a suspected breach via unauthorized access to the shipping management web system.
Industry
Manufacturing
Listing / capital
Unlisted
Sources
Last updated
October 28, 2026

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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

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

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