The realization of Society 5.0 requires the advancement of Cyber-Physical Systems (CPS), with Beyond 5G/6G serving as its fundamental communication technology. This lecture will discuss how millimeter waves and terahertz waves can be utilized in the 6G era based on research findings from NICT on Beyond 5G. In CPS, data obtained from IoT sensors is integrated into cyber space, where AI-driven optimization and actuation are carried out via digital twins. This process necessitates a communication environment that is high-capacity, low-latency, and ultra-reliable, making millimeter waves and terahertz waves crucial. In particular, their characteristics are expected to be effectively leveraged in the construction and updating of digital twins. This lecture will clarify how the utilization of millimeter waves and terahertz waves will accelerate the social implementation of Society 5.0 in the context of Beyond 5G/6G.