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BLeak confirmedMarch 18, 2026 announced

国際武道大学（委託先ネットワーク）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
March 18, 2026
Severity
BIncidents centered on names and contact details.
Scale
120 people
Main impact
Due to unauthorized access to an IT maintenance contractor, names, contact information, and other data of approximately 120 people who took caregiving experience courses in fiscal 2019 were leaked.
Information involved
User / member IDPhone numberHome addressFull nameDate of birth
Cause / key point
Information was leaked due to unauthorized access to the contractor's system.About Supply chain attacks (via vendors & shared services)
Industry
Education
Listing / capital
Non-profit corporation

Private university (via contractor)

Sources
Last updated
October 20, 2026
User / member IDPhone numberHome addressFull nameDate of birthHow 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

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Attack method classification: Supply chain attacks (via vendors & shared services)(Compromising the provider instead of the user)

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