AquesTalk TTS 1.1

the author of this app says:

Japanese Text-To-Speech engine.

Read translation, navigation and other apps in a female Japanese voice.

Works great with Google Translation, Google Navigation, etc.
This engine can be accessed via android TextToSpeech API from a variety of applications.


Setup:
1) Download and run this app.
2) Download Dictionary DIC Settings -> Download Dictionary (>10MB)
3) Go to Android Settings -> Voice Input & Output -> Text-to-Speech settings, activate AquesTalk TTS at the bottom of the screen, then select AquesTalk TTS as the Default Engine.
4) Settings -> Language & keyboard -> Select language, select Japanese.

see also below "Install & Settings"
http://blog-yama.a-quest.com/?eid=970118