Yamanashi is 1.75× the size of Réunion (France)

Yamanashi (prefecture of Japan) covers about 4,510 km² (1,740 mi²) and Réunion (France) (overseas region of France) about 2,580 km² (997 mi²). Below, both outlines are drawn at one scale and centred on each other.

4,510km²Yamanashi
2,580km²Réunion (France)

20 km

Yamanashi
Réunion (France)

What fits

Réunion (France) is 57% of the size of Yamanashi.
Yamanashi is larger by 1,930 km² (744 mi²), which is 75% of the area of Réunion (France).
Measured in Belgiums: Yamanashi is about 0.15, Réunion (France) about 0.08.

How they differ

Yamanashi is larger, but Réunion (France) has the larger population: 881,000 against 804,000, 1.10× as many people.
Per square kilometre that is 341 in Réunion (France) against 178 in Yamanashi: Réunion (France) is 1.91× as densely populated.
Their centres are about 10,800 km apart.
A standard web map misstates the comparison: Yamanashi at 36°N is drawn about 1.5× too large and Réunion (France) at 21°S about 1.1×, so the map shows Yamanashi as 2.30× the size of Réunion (France) instead of 1.75×.
Together Yamanashi and Réunion (France) cover 7,090 km², close to the size of Palestine (6,070 km², 14% smaller).
The gap between them, 1,930 km², is about the size of Mauritius (2,000 km²).
At Réunion (France)'s density, Yamanashi would have 1.5 million people (it has 804,000). At Yamanashi's density, Réunion (France) would have 460,000 (it has 881,000).
Yamanashi's centre is 56.7° of latitude, about 6,310 km, farther north than Réunion (France)'s.
Yamanashi is the 31st largest of the 47 prefectures of Japan and covers 1.2% of its area; it is the 33rd most densely populated of them.
Réunion (France) is the 15th largest of the 18 regions of France and covers 0.4% of its area; it is the 3rd most densely populated of them.
Yamanashi lies about 57° of latitude (roughly 6,310 km) north of Réunion (France), on the other side of the equator.
Shared out evenly, each person in Yamanashi would have about 5,610 m² and each person in Réunion (France) about 2,930 m².
Laid side by side, Yamanashi and Réunion (France) would cover 7,090 km², 1.24× the size of Brunei.
Together they have 1.7 million people, 92% as many people as North Macedonia.

Side by side

	Yamanashi	Réunion (France)
Is a	PrefectureJapan	Overseas regionFrance
Area, measured	4,510 km²1,740 mi²	2,580 km²997 mi²
Official area	4,470 km²Wikidata	2,510 km²Wikidata
Rank by area	31st of 47in Japan	15th of 18in France
Population	804,000Wikidata, 2021	881,000Wikidata, 2022
Rank by population	42nd of 47in Japan	13th of 18in France
Density	178 per km²	341 per km²
Capital	Kofu	Saint-Denis
Latitude range	35°N to 36°N	21°S to 21°S

Population: Wikidata 2021 and Wikidata 2022. Official figures: Wikidata (CC0).

Wikidata's official figure of 4,470 km² agrees with our measured area of 4,510 km², to within 2%.
Our measured 2,580 km² is 2.8% above Wikidata's official figure of 2,510 km². Official figures can include inland water or count land that an outline draws differently.

Similar in size to Yamanashi

Similar in size to Réunion (France)

More comparisons

Sources and method

Outlines: Natural Earth, 1:10m Admin 1 - States, Provinces, public domain
Boundary: De facto, as drawn by Natural Earth. A region is drawn whole, every island included; a country is its main territory.
Area: Measured on the WGS84 ellipsoid from the full-detail outlines, shown rounded.
Drawing: Each outline is projected with an equal-area projection centred on its own centroid, so areas stay true and the two can be laid over each other.
Data built: 2026-11-12

Full method