Team Manager, Platform Security - Cyber Security Defense Department (CSDD)

Job Description

This role leads Rakuten’s Platform Security team within the Cyber Security Defense Department. Requirements typically include substantial experience in cybersecurity, infrastructure or platform security, vulnerability management, cloud and network protection, incident response, and security monitoring. Experience managing engineers, coordinating cross-functional projects, and working with international teams is highly desirable. The successful candidate is expected to set security priorities, improve defensive capabilities, respond to emerging threats, mentor team members, and communicate clearly with technical and business stakeholders. Strong problem-solving skills, leadership ability, and practical knowledge of security frameworks, risk management, and enterprise platforms are essential. Professional English is likely required, while Japanese ability would be an advantage in Japan-based operations.

Company Info

Rakuten Group, Inc. is a major Japanese technology and internet company headquartered in Tokyo. Founded in 1997, it operates a broad ecosystem covering e-commerce, fintech, mobile communications, digital content, travel, advertising, and online services. The company is known for its membership-based platform, which connects customers and businesses through Rakuten’s points and loyalty program. Rakuten also runs Rakuten Mobile and provides technology, cloud, financial, and digital solutions across Japan and international markets. Its workforce is multicultural, and many technology roles use English as a working language, reflecting the company’s global ambitions. Security is an important area for Rakuten because it protects large-scale consumer platforms, financial services, telecommunications networks, and corporate systems. Employees generally work in a fast-moving environment with opportunities to influence products and infrastructure used by millions of customers.

Destination Guide

Japan offers strong opportunities in software engineering, cybersecurity, cloud computing, finance, robotics, healthcare technology, and international business. Tokyo is the largest employment hub, while Osaka, Nagoya, Fukuoka, and Sapporo offer growing technology and corporate markets. Japanese workplaces value reliability, teamwork, attention to detail, and respect for hierarchy, although international companies may be more flexible. Life combines excellent public transport, safety, convenience stores, rich food culture, and seasonal festivals, but housing and commuting in Tokyo can be expensive. Foreign professionals usually need an employer-sponsored work visa; highly skilled workers may qualify for a points-based visa or eventual permanent residence. Relocation typically involves arranging housing, residence registration, health insurance, a bank account, and a phone contract. Learning basic Japanese is valuable for daily life, government procedures, and building relationships, even when English is used at work.