Skip to content
JAENES
APossible leakOctober 9, 2026 announced

シックス・アパート（Movable Typeクラウド版）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 7, 2026
Announced on
October 9, 2026
Severity
AFinancial and HR records — information that easily translates into monetary damage.
Scale
Unknown
Main impact
An IDCF outage affected 31 servers of Movable Typeクラウド版; data were restored from backups and migrated to another cloud. Some functions remain suspended.
Information involved
User / member ID
Cause / key point
Cause is under investigation.
Industry
IT & telecom
Listing / capital
Unlisted
Sources
Last updated
October 20, 2026
User / member IDHow 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).

Incidents related to "idcf"

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

Same industry

Attack method classification: Under investigation / not stated(Cause not disclosed)

Read the Under investigation / not stated guide and national trends →

← Back to Breach Watch