The Port of Ishinomaki enabled to provide the system of transporting the rice produce in the eastern bound shipping route, from the canals of Kitakami-gawa River basin to Edo via Ishinomaki (Most of the time throughout Edo period, half of the total rice produce distributed in Edo was the transported rice from the Port of Ishinomaki of Sendai Domain).
これにより北上川流域水運を通じ石巻から江戸へ東廻り航路で米を移出する体制が整う（江戸時代の多くの期間において、江戸で流通する米の半分は仙台藩石巻港からの廻米であった）。