Ruins of Unozaki Battery

The Shogunate planned to build daiba (a battery) when foreign ships frequently infiltrated Edo Bay at the end of the Edo period.
In 1847, three batteries, Unosaki-daiba, Ashinozaki-daiba, and Owado-daiba, were built on Sarushima.
Currently, only Unosaki-daiba remains, and the other two sites were demolished when the Meiji period battery was constructed.