Saitama 5th district
legislative district of Japan
Saitama 5th district is a constituency of the House of Representatives in the Diet of Japan (national legislature). It is located in Saitama Prefecture and covers Nishi, Kita, Minuma, Ōmiya and Chūō wards of the city of Saitama.
Yukio Edano of the Constitutional Democratic Party (CDP) has held the district since the 2000 general election. After the Democratic Party dissolved and split in 2017, Edano ascended to leadership of the centre-left CDP, which became the second-largest party in the House of Representatives in the 2017 general election.
Edano along with other DPJ candidates won all but one district in Saitama in the 2009 DPJ landslide, wiping out the Liberal Democratic Party (LDP) from the prefecture. Their fortunes were reversed in the 2012 general election. Edano was the only member of the Democratic Party of Japan (DPJ) in Saitama prefecture to retain his seat, as the party lost two-thirds of its seats nationwide amid a poor economy and relative geopolitical decline. While losing the race, Edano's resurgent LDP opponent Hideki Makihara managed to gain a proportional block seat. The margin closed down further in the 2014 election and Makihara was only within 3,300 votes from unseating Edano. Makihara was unable to overcome the margin in the 2017 election following the nationwide surge of the Edano-led CDP. Edano was re-elected with a comfortable 20.28% majority.
This brief starts where responsible research should: with the source description of “Saitama 5th district” as legislative district of Japan. 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 legislative district of Japan. 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 Apr 14, 2026. The linked authority identifier is Q11426800. Authority coordinates are 35.910, 139.595. 1 of 1 selected statements include explicit references; 1 carry qualifiers and 0 use preferred rank. The first chronological checks are 2000, 2017, 2009 and 2012.
Modern boundaries and familiar names can conceal earlier jurisdictions or structures that do not align with the present site. 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
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 “Saitama 5th district”, its source revision and the description used here.
- Expand the search: follow Saitama 5th district primary sources, Saitama 5th district archive and Saitama 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 “Saitama 5th district”?
- 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 “Saitama 5th district” 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.