Themes
Seventh-century mountain fortresses in western Japan, built against invasion from the continent; frontier forts of the imperial court in the north. Nearly a thousand years older than samurai castles.
In-depth article
Tagajō, Miyagi
多賀城
In a small hall beside the south gate stands a stone that still announces, in its own carved words, that this "castle" was founded in 724.
In-depth article
Sōja, Okayama
鬼ノ城
No keep and no feudal lord: just 2.8 km of earthen wall ringing a mountaintop, built over 1,300 years ago.
In-depth article
Ōnojō, Fukuoka
大野城
Built in 665 to defend the nation, it rings the ridges of Mount Shioji behind Dazaifu with about 8 km of earthen ramparts and stone walls.
In-depth article
Akita, Akita
秋田城
The northernmost of Japan's ancient frontier forts, where soil from a Nara-period flush toilet held clues that visitors from the Asian mainland once stayed here.
Basic information
Kiyama, Saga
基肄城
Basic information
Tsushima, Nagasaki
金田城
Basic information
Yamaga, Kumamoto
鞠智城
Basic information
Takeo, Saga
おつぼ山城
Basic information
Marugame, Kagawa
城山城
Basic information
Sakata, Yamagata
城輪柵
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Saga, Saga
帯隈山城
Basic information
Yahaba, Iwate
徳丹城
Basic information
Morioka, Iwate
志波城
Basic information
Daisen, Akita
払田柵跡
Basic information
Ōshū, Iwate
胆沢城
Miyagi
郡山遺跡
Basic information
Itoshima, Fukuoka
雷山城
Basic information
Kurume, Fukuoka
高良山城
Basic information
Iizuka, Fukuoka
鹿毛馬神籠石
Kurihara, Miyagi
伊治城
Kami, Miyagi
城生柵跡
Basic information
Niigata
城柵
Basic information
Takamatsu, Kagawa
屋嶋城
Basic information
Yao, Osaka
高安城
Yamagata
出羽柵
Ishinomaki, Miyagi
桃生城
Niigata
渟足柵
Niigata
磐舟柵
Higashimatsushima, Miyagi
赤井官衙遺跡
Akita
都岐沙羅柵
Akita
雄勝城
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