Izawajō (胆沢城) was a Heian Period fortress built in 802 within Mutsu Province, located close to the confluence of the Izawa and Kitakami Rivers.
It was here that Sakanoue no Tamuramaro transferred his headquarters (Chinjufu) to so that he could continue his attempts at subjugating the Ezo People.
Today the ruins of this place can be found in Mizusawa City, Iwate Prefecture.12
1. Kodansha. (1993) ”Japan: An Illustrated Encyclopedia”. Tokyo: Kodansha Ltd.
2. Louis Frederic, translated by Kathe Roth (2002) “Japan Encyclopedia”. London: Harvard University Press.