As part of the cooperative research project with Hakuhodo DY Holdings, we planed and developed an AR Cloud experience called AR City. Using AR Cloud technology, which made it possible to share the same AR experience among multiple people, AR City transforms the exhibition booth into a communication space where people can have a chat and interact with each other. We believe that creating interaction and communication between users is an important piece for increasing the value of user experience of AR. Almost all of our projects since AR City have leveraged the knowledge of AR Cloud technology we accumulated through the AR City project.