Akasaka Palace is a state guest house of the government of Japan. Other state guesthouses include the Kyoto State Guest House and the Osaka State Guest House.
The palace was originally built as the Imperial Palace for the Crown Prince in 1909. Today the palace is designated by the Government of Japan as an official accommodation for visiting state dignitaries. Located in the Moto-Akasaka, Minato, Tokyo, the building took on its present function in 1974, having previously been an imperial detached palace. In 2009 the palace was designated as a National Treasure of Japan.
The palace is only open to public 10 days in year. Refer to the official website for detailed information.
Front Garden: free of charge
Main Building and Main Garden:
Adults: 1.000 JPY
High/Junior High School Students: 500 JPY
Japanese Style Annex:
Adults: 1.500 JPY
High/Junior High School Students: 700 JPY
Wikipedia https://en.wikipedia.org/wiki/Akasaka_Palace
Official Website http://www.geihinkan.go.jp/geihinkan/akasaka/koukai_e.html
Phone +81 3 5728 7788
Address Japan, 〒107-0051 Tokyo, 港区Motoakasaka, 2−1−1
Coordinates 35°40'49.13" N 139°43'43.581" E