Nagaoka-kyō (長岡京) was the capital of Japan from 784 to 794. Its location was in Otokuni District, Yamashiro Province, corresponding to a 4.3 x 5.3 kilometer area spanning the borders of modern cities of Mukō and Nagaokakyō, Kyoto, the town of Ōyamazaki, and the Nishikyō-ku ward of the city of Kyoto. The ruins of the palace have been found in the Kaidecho neighbourhood of the city of Mukō and have been designated as a National Historic Site since 1964, with the area under protection expanded in 2016.
Nagaoka Palace ruin monument in Mukō, Kyoto Prefecture
Chōdō-in (朝堂院) of Nagaoka-kyō (restoration model)
Daigokuden ruins
Goden ruins
The capital of Japan is Tokyo. Throughout history, the national capital has been in locations other than Tokyo.
Traditional site of Kuzuha-no-Miya Palace in Osaka Prefecture
1/1000 scale model of Fujiwara-kyō, held by Kashihara-shi Fujiwara-kyō reference room
1/1000 scale model of Heijō-kyō, held by Nara City Hall
1/1000 scale model of Heian-kyō, held by Kyoto City Heiankyo Sosei-Kan Museum