Data Breaches in Japan
9 data breaches have affected organizations headquartered in Japan. This geographic view helps security professionals understand regional threat patterns and compliance requirements. Organizations face various cyber threats based on regional economic activity and geopolitical factors.
Organizations operating in Japan must navigate specific regulatory requirements for breach notification and data protection. Local data protection and privacy regulations govern breach notification requirements. Understanding the breach landscape in your jurisdiction helps inform incident response planning and regulatory compliance strategies.
Compare breach activity across regions to understand where threats are concentrated. View breaches in the United States, United Kingdom, or explore by industry and incident type. For current activity, see the latest breaches worldwide.
| Date | Company | Type | Industry | Country | Severity | Source |
|---|---|---|---|---|---|---|
| Dec 15, 2025 | Japan | unauthorized access | - | Japan | 7/10 | View |
| Nov 28, 2025 | Asahi | ransomware | - | Japan | 8/10 | View |
| Nov 10, 2025 | Nikkei | unauthorized access | - | Japan | 5/10 | View |
| Nov 6, 2025 | Nikkei Says 17000 Impacted by | unauthorized access | - | Japan | 5/10 | View |
| Oct 9, 2025 | Qilin | ransomware | - | Japan | 6/10 | View |
| Mar 9, 2025 | NTT | unauthorized access | Technology | Japan | 5/10 | View |
| Mar 8, 2025 | Japanese Telco Giant NTT Com | unauthorized access | Technology | Japan | 5/10 | View |
| Oct 21, 2024 | Japanese | ransomware | Technology | Japan | 6/10 | View |
| Aug 4, 2024 | Leaks | unauthorized access | Technology | Japan | 5/10 | View |
Unlock Full Breach Intelligence
Get complete access to our breach database with advanced search, API integration, threat actor attribution, and real-time monitoring for your security operations.
Contact access@breachsignal.com for enterprise pricing.