This building was completed in 1918 as the Ebina Village Office. It was a cutting-edge modern building of its time, incorporating an architectural style known as the county office style. Later, Ebina City renovated part of this building and opened it in October 1982 as the Ebina City Local History Museum, "Ebina City Onkokan." It has contributed to the development and improvement of local culture by collecting, preserving, and exhibiting documents, records, folklore, archaeology, and other materials related to the history of the region. The Onkokan was originally opened in 1921 as the "Artifacts Exhibition Hall" in conjunction with the designation of the Sagami Kokubunji Temple ruins as a historical site. When the local history museum was opened in 1982, this name and materials were inherited.
The first floor displays high school and historical materials (stone tools, pottery, Kokubunji roof tiles, etc.). The second floor focuses on the theme of "clothing, food, and shelter," displaying materials that provide insight into the daily lives of ordinary people during the Meiji, Taisho, and Showa periods, including everyday items and farming tools.