Tobigasuyama Fort


TobigasuyamaToride (19).JPG


Tobiǵasuyama-toride was occupied by Takeda forces during te siege of Nagashinojō in 1575. The garrison consisted of commanders Kawakubo Nobuzane, with 250 warriors under him, and Komiyama Nobuchika, with another 250 under him. Tobiǵasuyama-toride was captured in a pre-dawn attack by over 4,000 Tokugawa soldiers under the command of Sakai Tadatsugu, a general of Tokugawa Ieyasu, in the preamble to the battle of Shitaraǵahara.

For more information see Nakayama-toride.

Visit Notes

Tobiǵasuyama-toride is a yamajiro (mountaintop castle) ruin in Norimoto Township, Shinshiro Municipality. The fortress consists of seven or so baileys formed from the flattening of the ridge. In the topmost bailey there is a hokora (mini-shrine). It seems this topmost bailey may have been perforated by a trench; on either side of the trail there are cuttings which look like trenches. Particularly, there is a tatebori (climbing trench) complex with two chutes divided by berms; judging by cuttings in the ridge, this trench network once continued through the topmost bailey. I checked the far side of the bailey and found a large pit; I don't know its origin.

The ridge descends and there is a hollowed out area - called a 'saddle' in Japanese - where there is a shed. It's easy to imagine the Takeda army encamped here. There is another couplet of baileys on from here. They are separated by what appears to be a trench and dorui (earthen ramparts). In the lower of this pair of baileys are monuments and an explanation board for the castle site.

The ridge swings down sharply after that, and there is a series of several bailey complexes. These lower baileys are heavily terraced. It seems they were subsequently cultivated, so it's hard to know what was originally sculpted for the fort. The impression is of a row of conicular stepped pyramids of earth. The lowest bailey, which now contains a cemtery, is thought to have had a look-out for observing Nagashino Castle.

  • Signboard for castle
  • Lower part of fort site with berm and marker
  • Climbing moat
  • Possible dorui between baileys

Castle Profile
English Name Tobigasuyama Fort
Japanese Name 鳶ヶ巣山砦
Alternate Names 鳶ヶ巣文殊山砦
Founder Takeda Katsuyori
Year Founded 1575
Castle Type Mountaintop
Castle Condition Ruins only
Historical Period Pre Edo Period
Artifacts Kuruwa, Tatebori, Dorui, &c.
Features trenches
Visitor Information
Access Nagashinojō Station on the Iida Line; 15 minute walk to trail
Visitor Information 24/7 free; mountain
Time Required 60 minutes
Location Shinshiro, Aichi Prefecture
Coordinates 34° 55' 15.78" N, 137° 34' 4.30" E
Loading map...
Added to Jcastle 2023
Contributor ART
Admin Year Visited Viewer Contributed
Friends of JCastle
Jōkaku Hōrōki
Shiseki Tanbōki
Umoreta Kojō

(one vote)
Add your comment welcomes all comments. If you do not want to be anonymous, register or log in. It is free.