Risk assessment is one of the important processes in the social implementation of robots. In risk assessment and safety design of systems with various stakeholders, modeling and visualization of related elements are important not only for designers but also for users. We examined the use of SafeML in the process and proposed its extension for the purpose for missing elements. Additionally, we submitted this paper after we received recommendations on content presented at “JSME Conference on Robotics and Mechatronics 2022”and added considerations.