On July 4, Rakuten Mobile announced that it had succeeded in demonstrating data communication in the Stand Alone 5G mobile network at the Ookayama Campus of Tokyo Institute of Technology with the cooperation of Tokyo Institute of Technology. The Stand Alone 5G mobile network is a mobile network that uses 5G communication technology from the radio access network (RAN) to the core network. It is expected that the features of 5G such as “ultra-high speed, large capacity”, “ultra-low latency”, and “multiple simultaneous connections” can be fully utilized, and end-to-end network slicing will be realized by advanced control over the network. This makes it possible to provide optimal services for a wide range of network applications. In the demonstration conducted at the Tokyo Institute of Technology Ookayama Campus, a data communication test was conducted using a terminal compatible with the Stand Alone 5G mobile network, and stable operation of the Stand Alone 5G mobile network was confirmed. As of June 24, Rakuten Mobile has started to introduce the Stand Alone 5G mobile network function in some commercial 5G networks, and the results obtained in this demonstration are the quality of the Stand Alone 5G mobile network. It will be used for improvement and preparation for the development of commercial services. In the future, we plan to verify the operation of various functions that will be fully realized in 5G, such as network slicing and edge computing, using the Stand Alone 5G mobile network, and will utilize the 5G network in collaboration with Tokyo Institute of Technology. We are proceeding with efforts toward various demonstration experiments. Rakuten Mobile’s Stand Alone 5G mobile network is running on the “Rakuten Communications Platform” as a completely cloud-native mobile network, with containers and microservices introduced, end-to-end from RAN to the core network. Functions as CNF (Cloud-Native Network Functions).