A Spanish style private residence constructed in 1921, based on observations by Genjiro Noda during his trip to Europe with Kinmochi Saionji. The design and construction was handled by Obayashi Corporation, and the extensions are Koji Ito’s design. After construction, it was used as the residence for the Aoyama family, and as tenant facilities for GHQ’s officers after the end of World War II. The ivy covering the outer walls is second generation stock from Koshien Stadium. Inside the premises are stained glass and glass windows from the Taisho era, torsion worked stair railings, a dining room mantelpiece, and beautiful ornaments such as vegetation patterned moldings. The building was recorded as a National Registered Tangible Cultural Property in 1997.