MIXIKoto Portal

1MinorPossibleAnnounced

Profiles of 750 members, 749 with emails, may have been viewed or taken via contractor Commune. Main game accounts and payment data are unaffected.

This incident was imported from a dataset that compiles public announcements, and we are still checking it against the sources. Counts and causes will be updated after the check. Sources are in Japanese.

Cause
Via a vendor or service
Occurred
2026-10-05 – 2026-10-06
Sector
Media & publishing
Operational impact
None

Data involved

DataStatusCountGroupEvidence
Email addressPossible leak749 people—Source(opens in a new tab)
User or member IDPossible leak750 people—Source(opens in a new tab)

Counts are the figures the organization announced. Because the same person may be counted more than once, we do not add the rows together.

What users should do

  • Watch for emails and texts pretending to be the company

General steps based on the type of data involved. Check the organization’s notice or help line to see whether you are affected.

Sources

  1. 外部委託先への不正アクセスによる「コトダマン」公式コミュニティの一部会員情報漏えいに関するお知らせとお詫びmixi.co.jp · Published 2026-10-14(opens in a new tab)