Although the conventional concept of communication is the exchange of logical information, the exchange of Kansei has become very important recently, especially in the case of mobile telephone communications. In addition, it has been recognized that the use of the body, such as facial expressions and gestures, is essential in communications. These facts indicate that technologies that can support Kansei expression using the body will become key technologies for future communications. In this paper, this point is discussed first. Then, as examples of such technologies, research results obtained by the authors are described.