Ichiri-zuka are milestones placed every four kilometers (ichiri) along the Go-Kaido Roads (Five Highways) starting from Nihombashi. They were created during the Tokugawa Shogunate by building up mounds of earth on both sides of the road. They allowed travelers to keep track of distance, and were used in the calculation of standard wages for laborers or hired horses.
This ichiri-zuka is located just before the entrance of Ogino settlement from the direction of Notajiri-juku, and the 20th ichiri-zuka from Nihombashi. The previous one is in Okunugi. There was an old pine tree, called “Hiramatsu” by local residents, on the north hill that was cut down and no longer exists.