Suishouzan Encampment

Suishōzan-jin is a mountaintop jinsho (encampment) ruin in Iwamura Township of Ena Municipality. Ruins are earthworks such as horikiri (trenches) and dorui (earthen ramparts). The fort has upper and lower sections. The upper section is on the peak of Mount Suishō, and the lower is on the ridge, clos

History

Suishōzan-jin was one of the jinsho used in the 1575 siege of Iwamura Castle by Oda forces. Given the terrain, it was likely used primarily as a place to observe the besieged castle and to keep watch over its mountainside rear.

For more information, see Iwamura Castle.

Field Notes

Suishōzan-jin is a mountaintop jinsho (encampment) ruin in Iwamura Township of Ena Municipality. Ruins are earthworks such as horikiri (trenches) and dorui (earthen ramparts). The fort has upper and lower sections. The upper section is on the peak of Mount Suishō, and the lower is on the ridge, close to Iwamurajō. The lower jinsho has a some flattened areas and a prominent rear trench. An old mountain path ascends from below and it has berms either side, giving the impression of a gate site where it terminates in the jinsho's bailey.

There are some indications of terracing and earthen bulwarks between the lower and upper jinsho sections. The upper jinsho contains the flattened peak with a long but shallow trench and earthen parapet below. It seems to have been used chiefly as a look-out.

Gallery

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  Rear trench of lower bailey
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Castle Profile
English Name	Suishouzan Encampment
Japanese Name	水晶山陣
Founder	Oda Nobutada
Year Founded	1575
Castle Type	Mountaintop
Castle Condition	Ruins only
Historical Period	Pre Edo Period
Features	trenches
Visitor Information
Access	Hike from Iwamura Castle; 70+min to summit.
Hours	24/7 free; mountain
Time Required	50 mins
Location	Ena, Gifu Prefecture
Coordinates	35.35846, 137.47033
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Admin
Added to Jcastle	2025
Contributor	ART
Admin Year Visited	Viewer Contributed
Friends of JCastle
Jōkaku Hōrōki

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