To offer suitable services even when the addition, change and deletion of contents or services are frequently conducted, and there are many registrations and inquiry requests.
There is provided an inquiry server 4a which acquires relevant information related to at least one of additional services and additional contents in which contents which can be added are determined according to property conditions of the contents and location information indicating a content center 9 which is a provider of these contents, receives property information indicating properties of the contents, and compares the property information with the property conditions, thereby specifying the relevant information related to at least one of additional services and additional contents, and corresponds this specified relevant information with the location information indicating the content center 9 which is a provider of at least one of the additional services and the additional contents related to this relevant information, and transmits the relevant information and location information in correspondence with each other.
MIYAJI HISATO
KATAYAMA ATSUSHI
YAMASHITA HIROYUKI
Yasuo Miyoshi