Teshio

Teshio lies at the mouth of a great river flowing into the Sea of Japan. Ainu communities along its lower course fished for salmon and trout, hunted in the surrounding country and exchanged marine goods for products from the upper river. Their contacts also reached Sakhalin and other coastal communities. A Matsumae trading district was established at the river mouth in 1786; eleven years later a survey party ascended the river as far as Otoineppu.