Investigating

Starts Publishing: OZmall intrusion may have exposed email (and some name/prefecture) for up to 442,779 members

Mass unauthorized access detected Sep 26, 2026. Possible viewing of member/some-ex-member emails and some name/prefecture fields; second notice cites up to 442,779 people. Cards via external payment out of scope. First disclosure Sep 27.

Last updated: 2026-11-09

Overview

“Up to 442,779” → blank.

Timeline

UnknownOccurred
2026-09-26Discovered
2026-09-27Disclosed

Organization response

Per the notice, the organisation investigated and contained the incident, notified individuals and offered monitoring or protective resources.

What you can do

Be wary of emails, SMS or calls impersonating the organisation; do not open links or attachments or enter passwords or card details. Change reused passwords on other services.

Sources

当社への不正アクセスによる個人情報流出の可能性に関するお知らせスターツ出版株式会社 · 2026-11-09
当社への不正アクセスによる個人情報流出の可能性に関するお知らせ（第２報）スターツ出版株式会社 · 2026-11-09

Starts Publishing: OZmall intrusion may have exposed email (and some name/prefecture) for up to 442,779 members

Overview

Timeline

Organization response

What you can do

Sources

Related information

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