The history of salt manufacturing in Sanpoku goes back a long ways. As early as the 9th or 10th century, the local method of boiling salt brine in earthenware pots was already quite well known. This fascinating technique has now been almost completely replaced, however, by the electrolytic process.
山北町製鹽的歷史悠久，從九至十世紀的土器製鹽法即享盛名，但當日本傳統製鹽法漸漸被電解鹽所取代時，這項珍貴的傳統製鹽法幾乎失傳。