Balāsagān (an Iranian toponym meaning "country of Balas"; Armenian: Bałasakan, Arabic: Balāsajān/Balāšajān), also known as Bazgan, was a region located in the area of the Kura and Aras rivers, adjacent to the Caspian Sea. To the south, it bordered Atropatene/Adurbadagan and Gilan. It roughly corresponded to the Armenian province of Paytakaran, albeit extending farther into the north. It has been suggested that under the Sasanians the region extended as far as the stronghold of Derbent, albeit this remains disputed. The heartland of Balasagan was the Dasht i-Bałasakan ("Balasagan plain") which corresponds to the Mughan plain. During the late Sasanian era, Balasagan was included in the northern quadrant (kust) of Adurbadagan.