The water channel at the salt farm was called the mio. It not only carried water throughout the farm but also served as a waterway the uwanibune (small boats used to transport cargo) used to travel in and out of the farm. These boats performed tasks such as bringing in fuel for the kamaya (a building where concentrated brine was boiled in a cauldron) or carrying salt away. Possibly because the mio at the Higashihama Salt Farm was influenced by the landscape or by the salt farms which had been there earlier, it branched and spread out in an irregular fashion, resembling the veins on a leaf and reaching every corner of the farm. After the salt farm closed, parts of the mio were repaired, and others were buried, and it lost its original appearance. However, one can trace the outline of the former mio in the parts of the farm where pieces of the channel remain or along the roads whose shape it influenced.