Higashi-Yamate No. 12 Building, House museum in Higashiyamate, Nagasaki, Japan.

Higashi-Yamate No. 12 Building is a single-storey wooden Western-style house near the Dutch Slope, with a main house and a smaller annex. Both have weatherboarded exteriors and plaster-finished interiors, and a wide veranda runs along the west side facing the sea. The main house has three large rooms, and the building now serves as the Former Foreign Settlement Private School History Museum.

Built in 1868 during the Meiji period, the structure initially served as the Russian and American consulates. It was later converted into an educational museum to preserve the history of this international presence in the city.

The building shows how foreign residents lived and worked in Nagasaki during the late 1800s. The displayed furnishings and personal items reflect a period when the city was a key point of contact between Japan and the Western world.

The building is near the Dutch Slope in the Higashi-Yamate district. It opens from 9 a.m. to 5 p.m. and closes from December 29 to January 3. Admission is free, and the single-storey interior is easy to walk through.

The building was fully restored between 1995 and 2005, so its interior is not original. It is the oldest Western-style building still standing in the Oura and Higashi-Yamate area, and since 1998 the main house and annex have been designated an Important Cultural Property.