Tokyo has become one of Asia’s most important cybersecurity hubs. As businesses rely more on digital platforms, the role of the CISO has taken on greater weight in shaping how organizations prevent threats and respond to growing risks. The leaders on this list oversee security for major telecom networks, financial systems, manufacturing operations, and public infrastructure. Their decisions help protect millions of users and support the security of Japan’s wider digital ecosystem.
Shinichi Yokohama
Group CISO, NTT Corporation / CEO, NTT Security Holdings
Yokohama leads cybersecurity across the entire NTT Group. He oversees global risk strategy, threat intelligence, and enterprise security operations. He also heads NTT Security Holdings, which reinforces his role in driving national and international cyber readiness.
Yutaka Miyachi
CISO, Cybertrust Japan
Miyachi guides information security for Cybertrust Japan, a company known for digital authentication and trusted infrastructure. His role includes device security, public key systems, and secure digital transformation for enterprise clients.
Kenji Miyazaki
CISO, LINE Yahoo
Miyazaki plays a key part in the merged LINE Yahoo organization. He manages cyber risk across widely used communication, e-commerce, and digital service platforms. His work supports the security of millions of users across Japan and Asia.
Kazunori Kumagai
CISO, Seven Bank
Kumagai is responsible for cybersecurity operations at Seven Bank, the financial institution behind Japan’s largest ATM network. His work centers on secure financial transactions, fraud prevention, and the protection of critical banking infrastructure.
Hiroshi Nakajima
CISO, Sompo Holdings
Nakajima directs security efforts for one of Japan’s major insurance and risk management groups. His role covers enterprise security governance, threat response, and digital trust for customers and partners.
Hiroshi Yamakawa
CISO, NTT East
Yamakawa leads cybersecurity operations for NTT East, which provides communications infrastructure across eastern Japan. His responsibilities cover network security, customer data protection, and operational resilience.
Tetsuro Akahane
CISO, SBI Holdings
Akahane manages cybersecurity across SBI’s financial, asset management, and digital banking operations. He supports regulatory compliance, secure transactions, and group-wide cyber risk oversight.
Nobuaki Tokuda
CISO, Tokyo Electron (TEL)
Tokuda handles security for one of the world’s leading semiconductor and manufacturing companies. He focuses on protecting intellectual property, supply chain integrity, and global production systems.
Shinya Yamada
Chief Security Officer, JR East Information Systems
Yamada leads cybersecurity for JR East’s digital operations. His work covers transportation systems, ticketing platforms, and IT infrastructure that supports public transit operations.
Taro Kono
CISO, KDDI Corporation
Kono directs cybersecurity for KDDI’s mobile and broadband services. His responsibilities include network protection, enterprise governance, and secure digital infrastructure for millions of customers.
Cybersecurity in Tokyo continues to evolve as new threats emerge and industries move deeper into cloud, AI, and connected systems. The CISOs highlighted here guide some of the country’s most complex environments and help shape the future of cyber resilience in Japan. Their leadership sets the direction for how companies strengthen defenses, manage risk, and build trust in a fast-changing digital world.