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Yakiniku King official app member data breach

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Made public · 10,788,963 official app member records

What leaked4

Hard to replace

  • Mobile number
  • Email address
  • Other profile data

Permanent

  • Full name
  • Mobile numberphone number · type not stated
  • Full namethe name registered in the app
  • Other profile datamember number

To-dos1 · about 5 min in all

  1. Know the scam pattern: calls and texts that cite these leaked detailsabout 5 minfreeLimits harm from: phishing messages

What happened next8 events

  1. Undetected 2 events0 days · show events
  2. Response 6 eventsNo individual notice on record · show events
  3. RemedyNone on record
  4. PenaltyNone on record
  5. DisputesNone on record
  1. Decided that its 11 group apps will stop holding names and phone numbers, with a new system planned for the first half of 2027
  2. Monogatari Corporation: no case of the leaked information being made public or used without authorisation confirmed so far
  3. Filed a notice on the TSE: 10,788,963 of 10,808,784 registered app-user records leaked
  4. Published an apology and the facts on the Yakiniku King website
  5. Confirmed that member data had leaked, after cutting the connection and adding defences
3 more
  1. Confirmed unauthorised access to the Yakiniku King app's member system
  2. Intrusion began
  3. Reported the unauthorised access to the police · stated as done by 20 October
Company
Yakiniku King
When it happened
Company detected it
Made public
Affected
10,788,963 official app member records · of 10,808,784 registered users

Sources