- Business
- VLC SECURITY CO., LTD. provides cybersecurity consulting, vulnerability assessment, technical security diagnostics, and practical cyber defense training solutions to corporate enterprises and public institutions in Japan. Founded in September 1994 and headquartered in Tokyo, Japan, the company operates through specialized business subsidiaries including VLC Security Consulting Co., Ltd., VLC Security Arena Co., Ltd., and VLC Security Lab Co., Ltd. Its core product and service portfolio encompasses information security consulting and compliance solutions, including PrivacyMark and ISMS (ISO/IEC 27001) certification acquisition support, security governance formulation, cloud security architecture design, internal audit advisory, and data leak forensic investigations; advanced technical security diagnostics, including web application vulnerability assessments, platform and network security audits, smart device application security reviews, red team penetration testing, and source code security evaluations; and immersive cyber defense training services, offering hands-on cyber warfare training through dedicated Cyber Arena simulation facilities, incident response exercises, targeted email attack drills, and specialized technical workforce development. In addition to its core cybersecurity operations, the company provides market research and sales promotion support services. In late 2025, the company executed a major corporate reorganization and rebranding, changing its corporate name from VLC Holdings Co., Ltd. (formerly Bulk Holdings Co., Ltd.) to VLC SECURITY CO., LTD. to align its corporate identity with its specialized cybersecurity focus. Concurrently, the group unified its operating subsidiaries under the VLC Security brand by restructuring Bulk Co., Ltd. into VLC Security Consulting Co., Ltd., CYBERGYM Japan Co., Ltd. into VLC Security Arena Co., Ltd., and CEL Co., Ltd. into VLC Security Lab Co., Ltd. to streamline service integration, leverage international training capabilities through its alliance with CyberGym Control Ltd., and expand its cybersecurity market presence across Japan.