An information distribution system includes an information center and a portable terminal. The portable terminal transmits user's personal information to the information center together with specifying information that specifies the distributed content. The information center registers the received personal information and specifying information in relation to each other. Upon receiving the content distribution request, the information center checks on the basis of the specifying information whether the personal information about the requested distributed content has already been registered. If the personal information has been registered, the information center distributes the personal information to the portable terminal together with the requested content. An information distribution method and a program are also disclosed.