Iwaseyama Castle

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Iwaseyama Castle is believed to have been founded by Nikaidō Yukitomo in the late Kamakura period. The Nikaidō Clan moved their headquarters to Sukagawa Castle thereafter but maintained Iwaseyama Castle as a satellite fortification. In 1589 Date Masamune captured Sukagawa Castle and the Nikaidō were defeated. In Uesugi Kagekatsu’s acquisition of the area in 1598, Iwaseyama Castle was taken over and he installed his retainer Kurita Gyobu as castellan.

Visit Notes

Iwaseyama Castle is a mountaintop castle ruin in Midorigaoka Park. The current site of Atago Shrine was the castle’s central compound and it is still ringed by dorui (earthen ramparts). One of the castle’s outer enclosures is now the site of the Sukagawa City Museum. The castle spread southward roughly where the park does today.


Castle Profile
English Name Iwaseyama Castle
Japanese Name 岩瀬山城
Alternate Names Atagoyama-jo
Founder Nikaidō Yukitomo
Year Founded early 14th century
Castle Type Mountaintop
Castle Condition Ruins only
Historical Period Pre Edo Period
Visitor Information
Access Sukagawa Station (Tōhoku Main Line), 15 minute walk
Visitor Information 24/7
Time Required 60 mins
Location Sukagawa, Fukushima Prefecture
Coordinates 37° 17' 32.03" N, 140° 22' 50.09" E
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Added to Jcastle 2017
Contributor ART
Admin Year Visited Viewer Contributed

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