日本能率協会マネジメントセンター（時間〈とき〉ラボ）Data breach / unauthorized access incident
- Occurred on
- Unconfirmed
- Announced on
- October 9, 2026
- Severity
- AFinancial and HR records — information that easily translates into monetary damage.
- Scale
- 2,950 people
- Main impact
- Announced a leak of member information for 2,950 people, including display names, emails, full names, addresses, phone numbers, etc., and suspended the community. They do not hold payment information.
- Information involved
- Email addressUser / member IDPhone numberHome addressFull name
- Cause / key point
- Unauthorized access to contractor Commune.About Supply chain attacks (via vendors & shared services)
- Industry
- Education
- Listing / capital
- Unlisted
日本能率協会マネジメントセンター is not publicly listed.
- Last updated
- October 20, 2026
Is this incident worth paying attention to?
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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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- S山口大学（教職員メール）2026.10.06 announced・Affected 1 accounts
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- S大阪市立小学校（成長・肥満度曲線）2026.09.09 announced・Affected 18 people
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Attack method classification: Supply chain attacks (via vendors & shared services)(Compromising the provider instead of the user)
Read the Supply chain attacks (via vendors & shared services) guide and national trends →