4. The speech synthesis system according to claim 1 , wherein: the speech element information storing unit is configured to store the speech element information and speech element identification information for identifying the speech element information in association with each other; the speech element requesting unit is configured to transmit the speech element identification information as the speech element request to the server device; and the speech element information transmitting unit is configured to transmit speech element information stored in association with the received speech element identification information.
1. A speech synthesis system comprising a server device and a client device connected so as to be capable of communicating with each other, wherein: the client device includes: a text information accepting unit configured to accept text information representing text; and a speech element requesting unit configured to transmit, to the server device, a speech element request for requesting speech element information representing respective speech elements composing speech corresponding to the text represented by the accepted text information; the server device includes: a speech element information storing unit configured to store speech element information representing respective speech elements included in speech uttered by a speech registering user; and a speech element information transmitting unit configured to receive the speech element request transmitted by the client device and, in response to the received speech element request, transmit the speech element information to the client device so that the speech element information is received by the client device in a different order from an order of arrangement of the speech elements in the speech corresponding to the text; and the client device further includes a speech synthesizing unit configured to receive the speech element information transmitted by the server device, rearrange the received speech element information so that speech elements represented by the received speech element information are arranged in a same order as the order of arrangement of the speech elements in the speech corresponding to the text, and generate speech information obtained by converting the text into speech based on the rearranged speech element information.