The Akasaka Palace (the State Guest House, or Geihinkan) is one of two state guesthouses in Japan. It was originally built as the Imperial Palace for the Crown Prince of Tokyo in 1909, and was used as official accommodation for State guests.
The Akasaka Palace has been open to the public since 1975 for only10 days a year during a summer period,
Since the Palace was registered as a national treasure in 2009, efforts have been made to increase the opportunity for the public to view this invaluable national treasure. The Japanese Government has decided to open its doors to the public throughout a year avoiding the periods of the visit of foreign dignitaries, after their trial opening of a limited period in February 2016.