9. The speech synthesis method according to claim 7 , wherein the storing device 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 synthesis method comprising: transmitting the speech element identification information as the speech element request to the server device, by the client device; and transmitting speech element information stored in the storing device in association with the received speech element identification information to the client device, by the server device.
7. A speech synthesis method, comprising: accepting text information representing text, by a client device; transmitting 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, to a server device, by the client device; receiving the speech element request transmitted by the client device and, in response to the received speech element request, transmitting speech element information, which is information stored in a storing device of the server device and is information representing respective speech elements included in speech uttered by a speech registering user, 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, by the server device; and receiving the speech element information transmitted by the server device, rearranging 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 generating speech information obtained by converting the text into speech based on the rearranged speech element information, by the client device.