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Bushiroad Reports Leak of About 13,000 Records Tied to BanG Dream! Our Notes

Bushiroad said on October 27 that personal information tied to BanG Dream! Our Notes was leaked after a third party accessed systems at an outside development contractor.

Reporting from 1 source: Inside.

Why it matters

The breach sits in data Bushiroad collected to run a beta test and a support desk rather than in the game itself, and the company says a leaked player ID alone cannot be used to log in or take over an account.

Bushiroad Reports Leak of About 13,000 Records Tied to BanG Dream! Our Notes

Key Facts

  • Bushiroad announced the leak on October 27.
  • A third party gained unauthorized access to systems at an outside company contracted for BanG Dream! Our Notes development.
  • The closed beta ran from June 25 to June 29, 2026, with 10,194 applicants, 71 operational staff, and 5 survey respondents affected.
  • Customer support data from 3,034 people who made inquiries between September 24 and October 14, 2026 was also affected.
  • Bushiroad says no password or credit card information leakage has been confirmed.

The data covers 10,194 applicants plus 71 operational staff and 5 survey respondents from a closed beta test held June 25 to June 29, 2026, and 3,034 people who contacted customer support between September 24 and October 14, 2026.

The contractor's systems were accessed because of management deficiencies at that company, and Bushiroad says the storage environments for closed beta data and support inquiries were both reached. The affected fields vary by person and include email addresses, IP addresses, device information, names, phone numbers, addresses, postal codes, and player IDs.

Bushiroad says no password or credit card data has been confirmed leaked, no secondary damage has been confirmed, and the contractor's management deficiencies have been fixed. It plans to contact affected users individually and warns that messages impersonating the company or the game may arrive.

Written with AI by Yomimono from the 1 cited source below, including Japanese-language reporting where cited. See our editorial policy.

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Sources