The chair assumes the future society where people, autonomous robotics, mobilities, avatars, and varieties agents move and act concurrently in the same living and working spaces around us. There have been remarkable technological evolution and common platform building in the abstract data exchange that could realize the idea of "digital twin" and "smart cities". However, there is almost no initiative to establish a common method to describe the spatial composition and the location of the agents and events. Such methods are being developed in each domain of industries. Though a number of well-advanced systems are being developed, there is a risk of fragmentation that could undermine the possible innovation relating to the digital-twin based built environment.

The chair defines "interspace" as the intermediate area where varieties of data and information are exchanged between physical space and cyberspace. It explores the common method to describe the spatial composition and the location. The method is expected to enable quick and precise data and information exchange in the interspace. The exploration is based on the concept of "common ground" that Prof. Keisuke Toyoda has developed.

The industry-government-academic partnership will be organized to facilitate the exploration and the diffusion of the output of this initiative to society.