Thanks for both replies. So, if you put a "1" in a prefecture you can only fill in a neighbouring prefecture with a "1" or "2". That's what I thought but I was hoping you could also wangle in a "6" to help you get out of the trouble that a "1" creates!! Really like the concept - can't wait to try it out on different age groups.
Yes that's it and that's what is complicated with this game. I really love this game and at home it clearly on of those we often play (I also have the chance to get the Tokyo map :-)