The Akasaka Palace, also known as the State Guest House, is a palace located in the Akasaka district of Tokyo. The palace was built in 1909 as the Imperial Guest House, and it has served as the official residence for visiting state dignitaries. The palace is known for its elegant European-style architecture, and it's surrounded by large gardens and courtyards. The palace is not open to the public, but visitors can take a tour of the palace's beautiful gardens and courtyards.