Back to the topic... (and this is to help someone in the future who may be looking for similar information as me).
Information can be found. It just takes time, and asking, around to find the right people... who are willing to have a "polite and respectable" conversation... who can, or will, lead you closer to the answer.
In my case, I have found that this frame is built by Yamaguchi. The rest of the story will make great conversation topics during bike rides.
Happy Thanksgiving everyone!
Ride safe this winter and enjoy the holidays!