Saiwai-ku, Kawasaki
one of the 7 wards of the city of Kawasaki
Saiwai-ku (幸区) is one of the 7 wards of the city of Kawasaki in Kanagawa Prefecture, Japan. As of 2010, the ward had an estimated population of 153,255 and a density of 15,250 persons per km2. The total area was 10.05 km2.
Geography
Saiwai Ward is located in eastern Kanagawa Prefecture, in the center portion of the city of Kawasaki, bordering on Tokyo to the north and Yokohama to the south.
Surrounding municipalities
Nakahara-ku, Kawasaki
Kawasaki-ku, Kawasaki
Ōta-ku, Tokyo
Kohoku-ku, Yokohama
Tsurumi-ku, Yokohama
History
Archaeologists have found numerous Kofun period remains at numerous locations in what is now Saiwai-ku, indicating a long period of human settlement. Under the Nara period Ritsuryō system, it became part of Tachibana District Musashi Province. In the Edo period, it was administered as tenryō territory controlled directly by the Tokugawa shogunate, but administered through various hatamoto, and was the center of a prosperous farming area adjacent to Kawasaki-juku, a post station on the Tokaido highway connecting Edo with Kyoto.
After the Meiji Restoration, the area urbanized due to its proximity to Kawasaki Station on the Tokaido Main Line. Saiwai Village within Tachibana District in the new Kanagawa Prefecture was created on April 1, 1889, through the merger of eight smaller hamlets. In the early twentieth century, the area was dominated by factories; notably Meiji Sugar and Toshiba.
This brief starts where responsible research should: with the source description of “Saiwai-ku, Kawasaki” as one of the 7 wards of the city of Kawasaki. Everything that follows is an evidence route, not borrowed authority.
Why this record matters
The subject matters to the places & architecture register because the source frames it as one of the 7 wards of the city of Kawasaki. Its deeper value depends on whether names, dates, institutions and citations support that framing.
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 May 17, 2026. The linked authority identifier is Q1153579. The first chronological checks are 2010 and 1889.
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 “Saiwai-ku, Kawasaki”, its source revision and the description used here.
- Expand the search: follow Saiwai-ku, Kawasaki primary sources, Saiwai-ku, Kawasaki archive and Saiwai-ku 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 “Saiwai-ku, Kawasaki”?
- 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 “Saiwai-ku, Kawasaki” 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.