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Research dossier · General Reference

Masuma Dam

dam in Chiba Prefecture, Japan

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General referenceInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionJul 1, 2026
Entity authorityQ34885270 ↗
Source-derived summary

Masuma Dam is a gravity dam located in Chiba Prefecture in Japan. The dam is used for water supply. The catchment area of the dam is 2.2 km2. The dam impounds about 54 ha of land when full and can store 520 thousand cubic meters of water. The construction of the dam was started on 1966 and completed in 1969.

Editorial summary

Begin with the source’s own compact description: “Masuma Dam” is dam in Chiba Prefecture, Japan. The dossier treats that line as a proposition to test through Masuma, Chiba and Prefecture, not as a finished interpretation.

Editorial reviewA practical starting point whose main value is the path it opens into stronger specialist and primary sources. The current lead gives the account dated anchors—1966, 1969—that can be checked directly. The linked authority record independently contributes the date 1966. For this dossier, Masuma, Chiba and Prefecture is the immediate research focus.
Editorial analysis

Why this record matters

The phrase “dam in Chiba 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

The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Jul 1, 2026. The linked authority identifier is Q34885270. Authority coordinates are 35.069, 139.929. 2 of 2 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1966 and 1969.

Critical limits

Overview language is designed for orientation and should not be treated as a substitute for the evidence cited beneath it. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. 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.

Best used for
  • Subject orientation
  • Search vocabulary
  • Locating named sources
Verify next

The closest primary source, responsible institution and strongest cited specialist reference.

Three-step research path

  1. Establish the record: confirm the title “Masuma Dam”, its source revision and the description used here.
  2. Expand the search: follow Masuma Dam primary sources, Masuma Dam archive and Masuma 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 “Masuma Dam”?
  2. Which cited source is closest to the event, object or claim?
  3. What terminology or title could unlock a more precise catalogue search?
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Source & attribution

This entry incorporates text from “Masuma Dam” 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.