Kunaishoyu Castle

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The castle was built by the local landholders, the Watanabe clan, in the Muromachi Period. The Watanabe controlled the greater Ichijoji area and also built Ichijojiyama Castle making this a flatland fortified home + mountaintop fortress combination that you often see in the Muromachi Period.

During the conflict between Nobunaga and Ashikaga Yoshiaki in 1573 some of Yoshiaki's allies hid in the castle, but the castle referred to here might have actually been Ichijojiyama Castle. It was eventually found out and when assailed by Nobunaga's forces the Watanabe capitulated. After Nobunaga, The Watanabe allied with Hideyoshi and served under his horse guards. The Watanabe clan held their lands here and remained as local bureaucrats through the Edo Period. The descendants of the Watanabe continue to live here today.

Visit Notes

The castle site is private property, but you can see some of the original earthen embankments and layout of the central compound today. The nagayamon is really interesting and adds some historical ambiance to the site but is not actually from the castle. The size of the castle was much larger than just the private residence. There was some evidence (now developed over) of a wide area around the residence being encircled by the moat. It also led to nearby place names such as Horinouchi, or "within the moat".

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Castle Profile
English Name Kunaishoyu Castle
Japanese Name 宮内少輔城
Alternate Names Watanabe-jo, Watanabe Yakata, Ichijoji Watanabe-jo, Ichijoji-jo
Founder Watanabe Clan
Year Founded
Castle Type Fortified Manor
Castle Condition Ruins only
Historical Period Pre Edo Period
Visitor Information
Access Ichijoji Station (Eizan Rail); 15 mins walk
Visitor Information private property
Time Required 10 mins
Location Kyoto, Kyoto
Coordinates 35° 2' 45.89" N, 135° 47' 40.45" E
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Added to Jcastle 2022
Contributor Eric
Admin Year Visited 2021
Admin Visits November 23, 2021
Friends of JCastle
Kojodan: Kunaishoyu-jo

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