Iouji Fort

History

Iōji-toride, also called Iōjiyama-jinsho, was the honjin (main fortified encampment) of Takeda Katsuyori during the Battle of Nagashino. Iōji-toride overlooked Nagashino Castle, and was used during the siege of the Tokugawa-held stronghold. The 'Battle of Nagashino' mostly refers to the skirmishes around the castle and the siege, whilst the famous ill-fated cavalry charge of the Takeda happened to the southwest at Shitaraǵahara.

Visit Notes

Iōji-toride is a hilltop fort site in Nagashino Township, Shinshiro Municipality. Ruins feature earthworks, including trenches and baileys. There are three baileys: east, west and middle/main. Between the middle and east bailey is a dobashi (earthen bridge). There is a trench between the middle and west bailey. The main bailey, where Takeda Katsuyori encamped, has a reconstructed miyagura (watchtower), erected in 2010. Nagashino Castle can be seen from the fort.

Iōji-toride is also called Iōjiyama-jinsho, a jinsho being an encampment site, and specifically is known as the main encampment of Takeda Katsuyori during his siege of Nagashino Castle in 1575. The site is accessed via well maintained trails, and I took the one to the right of Iōji (Temple). It takes less than ten minutes to walk up.

Gallery

Koguchi (gate site)
Restored watchtower
Dobashi (earthen bridge)
Horikiri (trench) and berm

Castle Profile
English Name	Iouji Fort
Japanese Name	医王寺砦
Alternate Names	Iōjiyama-jinsho (医王寺山陣所・医王寺山武田勝頼本陣)
Founder	Takeda Katsuyori
Year Founded	1575
Castle Type	Mountaintop
Castle Condition	No main keep but other buildings
Designations	Local Historic Site
Historical Period	Pre Edo Period
Artifacts	Miyagura (reconstructed), horikiri, dobashi, kuruwa, &c.
Features	turrets, trenches
Visitor Information
Access	Nagashinojō Station on the Iida Line; rental bike from Nagashino Castle museum to Iōji
Visitor Information	24/7 free; mountain
Time Required	40 minutes
Website	https://www.city.shinshiro.lg.jp/kanko/meisyo/takedakatsuyori.html
Location	Shinshiro, Aichi Prefecture
Coordinates	34° 55' 53.11" N, 137° 33' 28.40" E
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Admin
Added to Jcastle	2023
Contributor	ART
Admin Year Visited	Viewer Contributed
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