In Tsuchizaki, iron covers for utility holes have been engraved to commemorate the Hikiyama event and the Kitamae ships. The Hikiyama event is the annual event of the Tsuchizaki Shinmei Shrine, also known as the Tsuchizaki Port Festival. Every year on July 20 and 21, Hikiyama floats go around in the town carrying representations of historic scenes with large dolls to mark the summer in Akita. Kitamae ships navigated the rough waves of the Sea of Japan, connecting the towns of the coast, as sort of a trade company whose constant movement supported the Japanese commercial activities of those days, because of which the Port of Akita prospered from the 17th to 19th centuries. The Hikiyama event was designated as an important intangible cultural property by the state and also as an intangible cultural property of humanity by UNESCO. The Kitamae ships are designated as Japan Heritage by the National Agency for Cultural Affairs. These iron covers for utility holes have been used in the Tsuchizaki Port area since 2018.