This seems to depict Senryō-Ike pond, north of the present-day Kōzushima Island Port. Senryō Pond refers to a small inlet located in a gourd-shaped pond under the lighthouse. It is said that in the times past, the area was a place where a great number of Senryōbune (coasting vessels of the Edo period that transported goods from northeast Japan to Ōsaka) were pulled in and it was so named.