There are many theories regarding the exact location such as between Nutari no Ki (system of stockades) and Iwafune no Ki (system of stockades), both in present-day Niigata Prefecture, around the border between present-day Niigata Prefecture and Yamagata Prefecture and in the Yuri area in Akita Prefecture.
位置については現在の新潟県にあった渟足柵と磐舟柵の中間、現在の新潟県と山形県の境界付近、秋田県の由利地方など諸説ある。