Yoshiyuki Tabata is a Chief OSS Consultant at Hitachi OSPO with more than a decade of experience in identity and access management (IAM), authentication, authorization, and API security. He is a contributor to Keycloak, a co-author of the CNCF IAM Whitepaper, and serves as Tech Lead of CNCF TAG Security & Compliance. He is also a CNCF Ambassador and AAIF Ambassador, actively contributing to cloud native security, identity standards, and emerging AI agent ecosystems.