Kitaōmi Jōkan ruins
archaeological site in Japan

The Kitaōmi Fortification ruins (北近江城館跡群, Kitaōmi jōkan ato-gun) the name of a Japanese National Historic Site located in the city of Nagahama in northern Shiga Prefecture in the Kansai region of Japan. The site consists of the Shimosaka clan residence ruins (下坂氏館跡, Shimosaka-ke jōkan ato) and the Mitamura clan residence ruins (三田村氏館跡, Mitamura-ke jōkan).
Overview
The site of Shimosaka clan residence is in the Shimosakanaka-cho neighborhood in the southwestern part of the Nagahama Plain in the northern part of the prefecture. It is located in a very high natural river levee. The Shimosaka were local samurai from this area of Ōmi Province who were recorded as being in the service of the Ashikaga clan from 1336. They were active from the Onin War into the Sengoku period, by which time they had become vassals of the Kyōgoku clan and later the Azai clan. Following the destruction of the Azai clan by then forces of Oda Nobunaga, they abandoned their samurai status and returned to farming; however, even into the Edo period remained involved in the affairs of Hikone Domain. The descendants of the Shimosaka clan still live at and manage this site. The ruined fortified residence consists of an almost square site about 89 meters east-to-west and about 87 meters north-to-south, surrounded by double earthworks with a height of one to two meters and a width of two to five meters. It is surrounded by a three meter wide moat.
The public source identifies “Kitaōmi Jōkan ruins” as archaeological site in Japan. This brief keeps that definition visible, then builds a research path around Kitaōmi, Jōkan and ruins.
Why this record matters
A short description can identify a subject without explaining its stakes. For “Kitaōmi Jōkan ruins”, the useful work is to connect “archaeological site in Japan” to the records capable of establishing context and consequence.
Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Jul 19, 2026. The linked authority identifier is Q106226004. Authority coordinates are 35.418, 136.309. None of the 1 selected statements returned an explicit reference. The first chronological checks are 1336.
The absence of detail may reflect summary conventions rather than a lack of surviving documentation. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.
- Subject orientation
- Search vocabulary
- Locating named sources
The closest primary source, responsible institution and strongest cited specialist reference.
Three-step research path
- Establish the record: confirm the title “Kitaōmi Jōkan ruins”, its source revision and the description used here.
- Expand the search: follow Kitaōmi Jōkan ruins primary sources, Kitaōmi Jōkan ruins archive and Kitaōmi research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Kitaōmi Jōkan ruins”?
- Which institution is responsible for the underlying evidence?
- What terminology or title could unlock a more precise catalogue search?
Search terms from this dossier
This entry incorporates text from “Kitaōmi Jōkan ruins” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.