According to Security NEXT, Ryokkyukai, the alumni association of Otaru University of Commerce, announced that one of its computers suffered an external intrusion, potentially exposing member personal data [1]. The computer stored member names, addresses, phone numbers, and email addresses; the organization has not confirmed any external circulation of member data and found no evidence of external access to personal data on its file server [1]. Ryokkyukai is investigating with an external vendor, has consulted police, reported to the Personal Information Protection Commission, and alerted relevant individuals [1].
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Backfill: this event became public on Dec 26, 2025 and we added it on Nov 10, 2026. It is not a new event.
HighMonitoringBackfillMedia reported
Otaru University of Commerce Alumni Association Computer Breached; Potential Leakage of Member Data Under Investigation
1 min read
- Disclosed
- Dec 26, 2025
- Published
- Nov 10, 2026
- Last updated
- Nov 7, 2026
- CVSS basis
- Our assessment
- Attack vector
- Actor type
- Motivation
On this page
30-second summary
What happened
Who is affected
Industries mainly affected: Education
What to do nowOur advice
Ryokkyukai is investigating with an external vendor, has consulted police, reported to the Personal Information Protection Commission, and alerted relevant individuals [1]
Timeline
- Security NEXT publishes report (date only; timestamp is a placeholder)[1]
Technical details
Source-Verified Summary
Ryokkyukai, the alumni association of Otaru University of Commerce, announced that one of its computers suffered an external intrusion, potentially exposing member personal data. [1]
The computer stored member names, addresses, phone numbers, and email addresses; the organization has not confirmed any external circulation of member data and found no evidence of external access to personal data on its file server. [1]
Ryokkyukai is investigating with an external vendor, has consulted police, reported to the Personal Information Protection Commission, and alerted relevant individuals. [1]
References
Media1
- [1]
“小樽商科大学の同窓会組織である緑丘会は、パソコン1台が侵害されて会員の個人情報が外部に流出した可能性があることを明らかにした。”
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