なぜこの20か
City population from Wikidata's preferred figure (usually the latest census or official estimate). City limits differ a lot between countries, so compare within a country first.
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測り方
Wikidata: cities and big cities with 300,000 people or more.
参考資料
- Wikidata query: cities by population, Wikidata (CC0). Checked 2026-10-19 23:23 UTC.
こちらにも
写真: Shinjuku skyline, Tokyo - Sony A7R (11831328835) by Luke Ma from Taipei, Taiwan ROC, CC BY 2.0 via Wikimedia Commons. Pictures in rows: Wikimedia Commons, GitHub and the linked pages.