02 May State Guest House, Akasaka Palace (Japanese National Treasure)
Akasaka palace was built by first-class architect and craft artiest in 1909. It is only Neo-Baroque style architecture that you can find in Japan. The Palace was designated as a national treasure.
http://www8.cao.go.jp/geihinkan/index-e.html
Since 1974, Akasaka Palace has been used for diplomatic activities as an accommodation and a reception to a state or official guest.
Previously the palace was opened to the public only 10 days for a year and moreover people who can visit the palace were selected by lottery.
However, from this year 2016, Japan Cabinet of Office decides to open the palace to public as long as it does not interfere with diplomatic activities. You can visit the palace without lottery now but please its opening time and date before your visit.
For schedule in May and June:
5/1 – 5/13 (except 5/9-5/11)
5/31 – 6/21 (except 6/1, 6/8 and 6/15)
Web: http://www8.cao.go.jp/geihinkan/koukai/schedule_e.html
Phone:+81 3-3478-1111