Kitakamikawa

The upper Teshio country lies deep in the northern interior of Ezo, where the Nayoro River joins the Teshio. Ainu communities of the upper river exchanged products of the mountains with those of the coast, using the Teshio as a waterway. Tributaries also led toward passes through the surrounding mountains. One of them, the Sanru, preserves in its Ainu name a reference to a route from the mountains toward the shore.