An information processing system for managing personal information of a user, comprising an agent server, a storage unit and a management server, wherein the agent server comprises a registration unit, a login unit and an authentication information storage unit, wherein the storage unit is adapted to store the personal information of the user, and comprises a first storage area and a second storage area, wherein the management server comprises: a transmission unit, an integration unit, a first management-function unit, and a second management-function unit, whereby the registration unit is adapted to, in response to receiving first authentication information from the management server, store the first authentication information in association with second authentication information for the user in the storage unit; whereby the login unit is adapted to, in response to receiving the second authentication information, read the first authentication information corresponding to the second authentication information in the storage unit and log in to the management server using the first authentication information; whereby the transfer unit is adapted, in response to receiving a token from the first management-function unit, to transmit the token to the integration unit, and whereby the transmission unit is adapted, in response to storing personal information in the first storage area, to transmit first authentication information of the user to the agent server, whereby the integration unit is adapted, in response to receiving a token from the agent server, to verify the token and request personal information from the first management-function unit, and in response to receiving the personal information from the first management-function unit, to transfer the personal information to the second management-function unit, whereby the first management-function unit is adapted to manage the first storage area and, in response to receiving from the agent server a request for personal information, to issue to the agent server a token comprising permission information for accessing personal information of the user, and, in response to receiving from the integration unit a request for personal information, to read the personal information in the first storage unit and transmit the read personal information to the integration unit, whereby the second management-function unit is adapted to manage the second storage area and, in response to receiving the personal information from the integration unit, to store the personal information in the second storage area, wherein the first and second management-function units are each associated with a business operator, the business operators being different from one another. wherein the agent server comprises a registration unit, a login unit and an authentication information storage unit, wherein the storage unit is adapted to store the personal information of the user, and comprises a first storage area and a second storage area, wherein the management server comprises: a transmission unit, an integration unit, a first management-function unit, and a second management-function unit, whereby the registration unit is adapted to, in response to receiving first authentication information from the management server, store the first authentication information in association with second authentication information for the user in the storage unit; whereby the login unit is adapted to, in response to receiving the second authentication information, read the first authentication information corresponding to the second authentication information in the storage unit and log in to the management server using the first authentication information; whereby the transfer unit is adapted, in response to receiving a token from the first management-function unit, to transmit the token to the integration unit, and whereby the transmission unit is adapted, in response to storing personal information in the first storage area, to transmit first authentication information of the user to the agent server, whereby the integration unit is adapted, in response to receiving a token from the agent server, to verify the token and request personal information from the first management-function unit, and in response to receiving the personal information from the first management-function unit, to transfer the personal information to the second management-function unit, whereby the first management-function unit is adapted to manage the first storage area and, in response to receiving from the agent server a request for personal information, to issue to the agent server a token comprising permission information for accessing personal information of the user, and, in response to receiving from the integration unit a request for personal information, to read the personal information in the first storage unit and transmit the read personal information to the integration unit, whereby the second management-function unit is adapted to manage the second storage area and, in response to receiving the personal information from the integration unit, to store the personal information in the second storage area, wherein the first and second management-function units are each associated with a business operator, the business operators being different from one another.