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ODK Solutions data breach

ODK Solutions announced a data breach on Nov 2, 2026 affecting about 791,551 email addresses, exposing email addresses. It happened through a vendor (Arara (email delivery service)). No settlement or compensation has been announced.

Was I affected?

Subscribers to ODK Solutions' information newsletters for university students and for parents of university students.

ODK Solutions breach facts
AnnouncedNov 2, 2026
When it happenedIntrusion at email vendor Arara; Arara first said ODK's environment was unaffected, then reported the leak and count on November 3, 2026
CountryJapan
Email addresses exposed791,551
Data exposedEmail addresses
Through a vendorArara (email delivery service)
StatusConfirmed by the company or a regulator filing

What happened

ODK Solutions, a Japanese provider of systems for universities, said that 791,551 email addresses leaked after an outsider broke into Arara, the company that sent its newsletters for university students and for students' parents. It announced a possible leak on November 2, 2026 and confirmed it in a second notice on November 3. Email addresses were the only data registered with Arara. ODK began notifying affected people individually on November 6.

What should I do?

  1. Be wary of emails claiming to come from ODK Solutions, a university or Arara, and don't open their links or attachments.
  2. Don't enter personal details, passwords or card numbers for emails about jobs or tuition; delete them.
  3. Consider tightening spam filtering on the address you registered if scam emails increase.

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