http://www.pitt.edu/~dash/japan.html#mirror

I linked the full story in the IC, but that has an overview of 'The Mirror of Matsuyama' for a quick understanding of the story. (I had started writing out more of it in the post... but realized I was going to end up with waaaaay too many paragraphs covering just that, so hope it works as it is now)

Hope the post works, I'll be back in full swing tuesday evening : )