Human relationships registering system and device for registering human relationships, program for registering human relationships, and medium storing human relationships registering program and readable by computer

An apparatus including a server coupled to a communication network configured to establish and update relationships between members registered to a relationships registering system coupled to the communication network, the apparatus comprising:

• a database configured to store identification information and relationships of the members;
• a data receiver configured to receive, from a first member, identification information of the first member and of a second member stored in the database;
• a data retriever configured, in response to the received identification information of the first member and the second member, to search the database specifically for one or more third members that are directly related to both the first member and the second member;
• and
• a data sender configured to communicate to the first member via the communication network the identification information of at least a subset of the one or more third members.

A method, implemented by an apparatus including a server coupled to a communication network, for establishing and updating relationships between members registered to a relationships registering system coupled to the communication network, the method comprising:

• storing, at a database, personal attribute information, including identification information of the members, and relationship data indicating direct human relationships between at least some of the members;
• receiving from a first member, at a data receiver and via the communication network, one or more key words of a first search request including the identification information of a second member;
• searching the database, at a data retriever and in response to the first search request, specifically for personal attribute information of one or more third members having relationship data indicating a direct human relationship with the first member and with the second member;
• and
• communicating, at a data sender, to the first member via the communication network the retrieved personal attribute information of at least a subset of the one or more third members.