Today I tracked down some tools to help build in some text to speech features. First off, check out this website: http://voicetext.jp/
You can paste in some Japanese characters and select a variety of speaking voices. Pretty much rules. This site is what prompted me to add some speech on Kuesuto.org
I ended up using ResponsiveVoice to generate the speech for Kuesuto.org, it is not perfect, but it is a start.