Cyber Security Senior Analyst - Rakuten-CERT Section, Cyber Security Defense Department (CSDD)

Role summary

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Rakuten-CERT’s Cyber Security Senior Analyst helps protect Rakuten’s systems, services, and users from cyber threats. The role typically involves security monitoring, incident detection and response, threat investigation, vulnerability assessment, malware or forensic analysis, and coordination with internal technology teams. Candidates are expected to have several years of practical cybersecurity or SOC experience, strong knowledge of security tools, networks, operating systems, and incident-response procedures. Experience with threat intelligence, SIEM platforms, scripting, cloud security, and recognized security certifications is advantageous. The position also requires clear communication, sound judgment under pressure, careful documentation, and the ability to work across international teams. Business-level English is important, while Japanese proficiency may be beneficial.

About the employer

Rakuten Group, Inc. is a major Japanese technology and internet company headquartered in Tokyo. Founded in 1997, it began as an online marketplace and has expanded into a broad ecosystem covering e-commerce, fintech, digital content, travel, communications, advertising, and professional sports. Its businesses include Rakuten Ichiba, Rakuten Card, Rakuten Bank, Rakuten Mobile, Rakuten Travel, and Viber. The company serves customers and merchants in Japan and international markets, using a shared membership and loyalty platform to connect its services. Because Rakuten operates large-scale consumer, financial, cloud, and mobile platforms, cybersecurity is a significant priority. Rakuten-CERT supports the company’s security defense, incident response, threat analysis, and resilience activities. The workplace is generally international and fast-moving, with opportunities to collaborate across technical and business divisions.