Island

Honshu

Natural Earth’s outline of Honshu measures about 225,000 km² (86,900 mi²), the 6th largest of the 81 islands on sizeversus, and about the same size as Laos.

200 km
  • Laos
  • Honshu

The numbers

The area is measured from the outline drawn above, on the WGS84 ellipsoid; the published figure is shown beside it, and a water body is kept only if the two are within 10%.

What the numbers say about Honshu

About the same size as

Where it lies

Natural Earth’s outlines of Japan contain or lie within 4 km of the outline of Honshu. That is what its geometry says, and it is not a statement about who owns the water or where any border runs in it.

Where Honshu ranks

Honshu is the 6th largest of the 81 islands on sizeversus, ranked by measured area.

Ranked islands

  1. 3Borneo725,000 km²
  2. 4Madagascar (island)589,000 km²
  3. 5Baffin Island509,000 km²
  4. 6Honshu225,000 km²
  5. 7Victoria Island220,000 km²
  6. 8Great Britain214,000 km²
  7. 9Ellesmere Island196,000 km²

All islands, matched to countries

Compare Honshu

Share this outline

Outline of Honshu, about 225,000 km², drawn to true scale
Outlines are drawn at true scale.
Sources and method
Outline
Natural Earth, 1:10m Geography Regions (geography_regions_polys), public domain (Geography Regions (geography_regions_polys)). Outlines of lakes are drawn at 1:10 million.
Boundary
A lake or a sea has no legal boundary of its own. The outline is a cartographic one, and the page says so by showing the measured area beside the published one.
Area basis
Measured outline: computed on the WGS84 ellipsoid from the full-detail outline and shown rounded. Published figure: Wikidata (CC0), fetched 2026-11-11. An outline is kept within 10% of the published figure and matched to other places automatically within 5%.
Shore
Countries whose Natural Earth outline contains or comes close to the water's outline; computed, not a statement of ownership.
Drawing
Each outline is projected with an equal-area projection centred on its own centroid, so areas stay true and two can be laid over each other.
Data built
2026-11-11

Full method