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Research dossier · Places & Architecture

Ukan

dissolved municipality in Jōbō district, Okayama prefecture, Japan

Architectural plans, a scale model, maps and brass measuring instruments
Places and architectureInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionApr 1, 2026
Entity authorityQ7878265 ↗
Source-derived summary

Ukan (有漢町, Ukan-chō) was a town located in Jōbō District, Okayama Prefecture, Japan.

As of 2003, the town had an estimated population of 2,621 and a density of 56.14 persons per km2. The total area was 46.69 km2.

On October 1, 2004, Ukan, along with the towns of Bitchū, Kawakami and Nariwa (all from Kawakami District), was merged into the expanded city of Takahashi and no longer exists as an independent municipality.

Editorial summary

Begin with the source’s own compact description: “Ukan” is dissolved municipality in Jōbō district, Okayama prefecture, Japan. The dossier treats that line as a proposition to test through Ukan, dissolved and municipality, not as a finished interpretation.

Editorial reviewA valuable geographic starting point for tracing changing names, boundaries, uses and administrative responsibility. The current lead gives the account dated anchors—2003, 2004—that can be checked directly. The authority record carries competing date values—1956-04-01, 1889-06-01—which should remain separate until their references and qualifiers are resolved. For this dossier, Ukan, dissolved and municipality is the immediate research focus.
Editorial analysis

Why this record matters

The phrase “dissolved municipality in Jōbō district, Okayama prefecture, Japan” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.

Evidence profile

Place names and jurisdictional language are key evidence: both can reveal earlier catalogue descriptions and overlooked record series. The source revision retrieved here is dated Apr 1, 2026. The linked authority identifier is Q7878265. VIAF identifies the subject as 253529094. Authority coordinates are 34.899, 133.653. 1 of 4 selected statements include explicit references; 0 carry qualifiers and 1 use preferred rank. The first chronological checks are 2003 and 2004.

Critical limits

Architectural summaries often privilege surviving fabric and can understate demolished phases, contested use or displaced communities. 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

Treat names, boundaries and functions as historically changeable. Maps, plans, inventories and administrative records can clarify what the place meant at different dates.

Best used for
  • Historic place names
  • Jurisdictional context
  • Routes into maps and plans
Verify next

Contemporary maps, plans, listed-building records, estate papers and the responsible local or national archive.

Three-step research path

  1. Establish the record: confirm the title “Ukan”, its source revision and the description used here.
  2. Expand the search: follow Ukan primary sources, Ukan archive and Ukan research across catalogues and specialist indexes.
  3. Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.

Questions for further research

  1. Which source most directly establishes the central claim about “Ukan”?
  2. What physical evidence or contemporary plan supports the description?
  3. Which authority defined the place, boundary or structure at the relevant date?
Subject index

Search terms from this dossier

Source & attribution

This entry incorporates text from “Ukan” 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.