Text to speech

Hi guys, I have randomly generated names from 86 japanese characters (romaji) [ka, ji, tsu, ma, etc...]. I would like to make my own standalone text to speech script (so that it will work on all platforms)

I hear this requires a dictionary of nearly 100,000 words (in english) but since I am using japanese characters that are basically said with very little variation I feel like my reference dictionary could be very small.

Does anyone have the slightest idea where to begin?