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Nikkei Inc. data breach

Was I affected?

Nikkei Inc. confirmed a breach involving up to 1.8 million records (duplicates possible), exposing names, email addresses, addresses and phone numbers. You may be affected if you have given Nikkei your contact details, for example as a Nikkei reader or service user, and Nikkei contacts you about this incident.

Nikkei Inc. breach facts
AnnouncedOct 16, 2026
When it happenedEarly morning of October 7, 2026
CountryJapan
Records exposed (may include duplicates)1.8 million
Data exposedNames, Email addresses, Addresses, Phone numbers, Dates of birth and Other details
StatusConfirmed by the company or a regulator filing

What happened

Nikkei Inc., publisher of the Nikkei business newspaper, said on October 16, 2026 that a cloud service it uses for system development was accessed with stolen credentials in the early hours of October 7, and about 1.83 million records of personal information stored there leaked. About 150,000 of the records contain one or more of a name, email address, postal address, phone number or date of birth (about 120,000 include an email address); the other roughly 1.68 million are identifiers that cannot identify a person on their own. Credit card information was not included. Nikkei reported the breach to Japan's Personal Information Protection Commission on October 11, disabled the stolen credentials and says it will notify affected people individually.

What should I do?

  1. Watch for phishing emails that pretend to be from Nikkei or its services, and sign in by typing the Nikkei address yourself.
  2. Don't share passwords or card details in reply to emails or calls about this incident.
  3. Use the contact form on Nikkei's official notice if you have questions.
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