Through a case study of the mailing lists managed by the Zige-okoshi Internet Meeting Tottori and the Kan-Setouchi Exchange Club 21, process and spatial structure of communications through the mailing lists had been examined. Four points were elucidated through two mailing lists ; process of developing the communications, characteristics depended on the people belonging to, spatial structure and the point of contact between the cyberspace and the real space. As a result, the knowledge was acquired as follows. 1) Communications through the mailing lists would be different in the quantity of transmission and the regional interconnectivity according to the contents of information. In other word, the places where the key persons live will be at the core of all contents, but in the other areas transmitted contents differ because that depend on each interest of participants who live there, and strong and weak would occur in transmitted quantity and regional interconnectivity. 2) Communications through the mailing lists would be developed around the places where the key persons live and the places where the offline activity was held, regardless of the regional gap in the population scale and the number of participants. The main factors to decide the spacide the spatial characteristics of communications in the mailing lists are the role and interest of the participant and concrete activity in the real space. 3) Communication through the mailing lists and the offline activity are complementing each other. Offline activities are planned and adjusted by communications through the mailing lists, and personal relationships formed in the mailing lists are strengthened by the offline activities, so that would raise consciousness to promote the activities in the real space. In addition, communications through the mailing lists work for a participant who is going to develop the regional promoting activity in the other area, and finding a new cooperator would widely expant the regional promoting activities in the real space. 4) In the communications through the mailing lists about the regional promoting activities in the ares, its spatial structure, the participant's senses for the area and the the point of contact between the cyberspace and the regional promoting activities in the real space are different according to the location and the scale of the activity area.
This paper examines the present conditions of and the functional change of the office agglimeration in Makuhari New City. The office-buildings in Makuhari New City opened for tenants in 1989, during the "bubble economy" era. These buildings were initially almost fully occupied due to the well-equipped facilities. After the beginning of the 1990s when the bubble economy collapsed, however, many tenant offices moved out, resulting in a sharp increase in vacancy. To resolve this situation, the building management companies lowerred the office rent to re-attract tenants. During the bubble economy era, the offices in Makuhari New City were typically functional extensions of their headquarters in the central area of Tokyo. But in the post bubble economy era, many offices in Makuhari New City originated from Chiba City, and functioned as branch offices of Chiba-based firms. For these firms, reasonable office rent and favorable images of the Makuhari area were some of the most important criteria in selecting this location. In short, the officers in Makuhari New City went through a functional change in the post bubble economy era from back offices of corporate headquarters in the central Tokyo to regional branch offices for Chiba-based firms.