Wikipedia
Voiceroid
Voiceroid is a speech synthesizer application developed by AH Software and is designed for speech. It is only available in the Japanese language. Its name comes from the singing software Vocaloid, for which AH-Software also develops voicebanks. Both AH-Software's Vocaloids and Voiceroids went on sale on December 4, 2009.
It differs from regular Text to Speech programs in that it gives the user more control over settings like tempo, pitch, and intonation.