Nick, welcome to the board. What a puzzle you've brought us as your first post!
Thinking laterally, I wondered if the word Piano might be a help, so I ran it through the Google translate page (piano is an Italian word as well as English), and came up with some interesting results:
http://translate.google.com/#auto/en/piano as it has many more meanings than the two I knew of (the instrument, and playing music slowly/gently). There are connection with plans and designs etc... see the link for the whole list, so I wonder if Piano in this sense points to one of those?
Also, the figure of the man is wearing a turban, in the style as found in places such as India and Turkey, so again that might be an indicator, rather than Japan... even though the face has more of a Japanese look, I really don't think he is Japanese. I'd be looking more towards Mongolia I think...
Probably not much to go on but it might help a wee bit.