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Nomura and Bic Camera Hit by Data Breach Affecting Millions

Nomura and Bic Camera Hit by Data Breach Affecting Millions

First seen 4 Nov 2026, 12:47 UTC • •

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ThreatCluster AI
ThreatCluster •November 4, 2026 at 12:48 UTC
  • •Nomura's system for institutional investors suffered unauthorized access, details on records affected are unclear.
  • •Bic Camera reported a potential leak of 14.9 million customer records from a contractor's email system.
  • •Both companies have suspended their services and are investigating the breaches.

Nomura Investor Relations Co. reported unauthorized access to its systems, leading to a data breach. The breach affects its information services for institutional investors and analysts, though the number of records compromised has not been disclosed. Concurrently, Bic Camera announced that approximately 14.9 million customer records may have leaked due to unauthorized access to a contractor's email distribution system. The leaked data includes personal information like names and email addresses, but no credit card details were involved. Both companies are investigating the extent of the breaches and have suspended affected services. Bic Camera's compromised system was managed by Arara Inc., and no secondary damage has been confirmed at this time.

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Timeline

2026-11-01
Unauthorized access detected at Nomura
Nomura Investor Relations confirmed unauthorized access to its systems, leading to a data breach.
Mainichi.Jp
2026-11-02
Bic Camera reveals potential data leak
Bic Camera announced that approximately 14.9 million customer records may have leaked due to a contractor's email system breach.
Mainichi.Jp
2026-11-03
Data breach confirmed by Nomura
Nomura confirmed the data breach the day after unauthorized access was detected, suspending affected services.
Mainichi.Jp

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Common questions

What customer data was leaked?
Bic Camera reported that the leaked data includes names and email addresses, but no credit card information.
How many records are affected?
Bic Camera stated that approximately 14.9 million customer records may have been compromised.
What actions are being taken?
Both Nomura and Bic Camera have suspended affected services and are currently investigating the breaches.