Case Study: Japan Net Bank achieves real-time cybersecurity visibility and cuts incident response from hours to minutes with Splunk Enterprise

Japan’s Online Banking Pioneer Gains Real-Time Visibility into Cybersecurity Risks

Japan Net Bank, Japan’s first internet-only bank, needed to strengthen cybersecurity for its entirely online model. The IT Supervision Department struggled with inefficient, labor-intensive log management across office automation, firewalls, proxies and web access logs, which made detecting unauthorized access and protecting transactions slow and error-prone. The bank also required high-accuracy monitoring and secure information sharing with Financials ISAC Japan.

By deploying Splunk Enterprise to collect and analyze machine data in real time, JNB gained centralized visibility and faster investigations—cutting incident analysis from hours or a day to minutes. The platform enabled automated alerts to the CSIRT, helped prevent illegal money transfers (including identifying 20+ spoof sites), supported a new Security Operations Center, and opened opportunities to extend analytics and machine-learning detection for broader fraud and account monitoring.

Japan Net Bank

Kenji Ninomiya

Senior Manager, IT Planning Department / JNB-CSIRT,