As one part of that policy, the Matsumae clan drew a boundary line in the Wajinchi, established guardhouses at both east and west ends, and supervised coming and going of people between Wajinchi and Ezo area.
その一環として、松前藩は和人地に境界を引き、東西の端に番所を置いて、和人地と蝦夷地の往来を取り締まった。