Japanese TTS softwares from at latest 1996

I’ve found LaLaVoice and I love it but it was released 2001. For historical accuracy purposes, I need a Japanese TTS that was released at the latest 1996. Please someone help me out here!!

If needs got THAT desperate I guess I’d be fine with a voice that sounded extremely robotic by modern standards and sounds like it could have been from the late 90s…

by SUSHIxSUICIDE