Ookami Toshi

Wolf City overlooks a sharp cliff at the mountains edge. It is well guarded, containing an extraordinary messenger system. If under attack Daidoji runners will spread the news within days, maybe even sooner. Some say the heart of Ookami Toshi holds a great mirror capable of passing messages back and forth to another mirror, hidden somewhere in the Empire, possibly Kyuden Doji. (3E p. 289)