Hachioji Gakuen: ransomware attack may have exposed current/former students’ and related personal data

Possible data leak: First notice Jul 13, 2026 reported ransomware on some servers. Second notice (Sep 30) details Jul 8 intrusion / Jul 10 encryption of files including current/former students, applicants, guardians, staff and retirees. No clear exfiltration traces, but log deletion prevents fully ruling out leakage. No count. First disclosure remains Jul 13.