Okayama
city in Okayama prefecture, Japan
Okayama (岡山市, Okayama-shi; Japanese: [okaꜜjama]) is the capital city of Okayama Prefecture in the Chūgoku region of Japan. The Okayama metropolitan area, centered around the city, has the largest urban employment zone in the Chugoku region of western Japan. The city was founded on June 1, 1889. As of February 2023, the city has an estimated population of 700,940 and a population density of 890 people per km2. The total area is 789.95 square kilometres (305.00 square miles).
The city is the site of Kōraku-en, known as one of the top three traditional gardens in Japan, and Okayama Castle, which is ranked among the best 100 Japanese castles. The city is famous as the setting of the Japanese fable Momotarō. Okayama joined the UNESCO Global Network of Learning Cities in 2016.
History
Sengoku to Edo period
In the late 16th century, during the Sengoku period (also called the Warring states period), Ukita Naoie consolidated a stronghold at Ishiyama beside the Asahi River. His successor, Ukita Hideie, shifted the main enclosure to the hill called "Okayama" and completed Okayama Castle, traditionally dated to 1597; hydrological works redirected river channels to serve as moats, and a castle town was laid out on a north–south axis.
Begin with the source’s own compact description: “Okayama” is city in Okayama prefecture, Japan. The dossier treats that line as a proposition to test through Okayama, city and prefecture, not as a finished interpretation.
Why this record matters
The phrase “city in 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.
The strongest evidence will usually combine a dated visual record with documents produced by the authority responsible for the place. The source revision retrieved here is dated Sep 17, 2026. The linked authority identifier is Q200078. VIAF identifies the subject as 254704805. The Library of Congress control number is n80065901. Authority coordinates are 34.655, 133.920. 3 of 5 selected statements include explicit references; 1 carry qualifiers and 0 use preferred rank. The first chronological checks are 1889, 2023, 2016 and 1597.
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.
- Historic place names
- Jurisdictional context
- Routes into maps and plans
Contemporary maps, plans, listed-building records, estate papers and the responsible local or national archive.
Three-step research path
- Establish the record: confirm the title “Okayama”, its source revision and the description used here.
- Expand the search: follow Okayama primary sources, Okayama archive and Okayama 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 “Okayama”?
- What physical evidence or contemporary plan supports the description?
- Which authority defined the place, boundary or structure at the relevant date?
Search terms from this dossier
This entry incorporates text from “Okayama” 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.