Place comparison

Green Island compared with Ishigaki Island: area, population and density

Ishigaki Island has nearly fifteen times Green Island land and more than eleven times its reported registered population.

Place A Grouped by country or region Place B Grouped by country or region

Equal-area outline comparison

Outlines are centered and scaled by official land area; position does not show geographic location.

Area

Population

Population density

Area data date

Population data date

The guide below belongs to this pair: Green Island and Ishigaki Island. Change the selector above and the page follows, so the reading always matches the tool.

Direct answer

How different are Green Island and Ishigaki Island?

Green Island covers 15.1 km² (5.83 sq mi); Green Island's area is about 6.8% of Ishigaki Island's. Its reported population is 4,327; Green Island's population is about 8.8% of Ishigaki Island's. By average density, Green Island's population density is 1.29 times Ishigaki Island's.

Area difference

Green Island's area is about 6.8% of Ishigaki Island's 15.1 km² (5.83 sq mi) · 222.2 km² (85.8 sq mi)

Population difference

Green Island's population is about 8.8% of Ishigaki Island's 4,327 · 49,387

Density difference

Green Island's population density is 1.29 times Ishigaki Island's 286.7 /km² (743 /sq mi) · 222.2 /km² (576 /sq mi)

Full data and sources for each place: Green Island area & population, Ishigaki Island area & population

Straight-line distance between geometric centres: about 345 km; time difference: 1 hour.

On a familiar scale

Green Island ≈ 26% of Manhattan (reference rung) 3,488 m² of land per resident
Ishigaki Island ≈ 1.4 × Washington, D.C. (reference rung) 4,500 m² of land per resident

Reference scales come from U.S. Census Bureau: 2025 Gazetteer Files: land area of states and counties , as of 2025-01-01.

How to read it

Ishigaki population excludes foreign residents, so its calculated density is narrower than a complete resident count.

Geography and shape

Ishigaki is a much larger mountainous island in the Yaeyama group. Green Island is smaller and volcanic. A common outline scale shows that the familiar Taiwanese island occupies only a small fraction of Ishigaki land.

Population context

Ishigaki reports far more registered Japanese nationals than Green Island township residents. Because the source excludes foreign residents, the displayed Ishigaki density understates a complete all-resident measure.

Boundaries and definitions

Area and outline both represent Ishigaki Island rather than Ishigaki City. Green Island is likewise island-focused. The principal limitation is population definition, not geographic shape.

Green Island: Physical Green Island area paired with the registered population of Green Island Township at year-end 2025. The township and main island are nearly coextensive, but the population remains an administrative count.

Ishigaki Island: Ishigaki Island only. Population is the registered Japanese-national population and excludes foreign residents. This does not use Ishigaki City's wider administrative area, which includes the Senkaku Islands.

In-depth guide

How should Green Island and Ishigaki Island be understood in context?

Ishigaki approaches fifteen Green Islands by land area. The visual gap is clear, while the population comparison requires one extra note because the Ishigaki source excludes foreign residents.

Keep Ishigaki Island separate from Ishigaki City

The outline and area use the physical island. Ishigaki City extends to remote islands and would create a mismatched comparison if its full territory were used.

Green Island also uses its physical outline, so the land result is directly interpretable.

The Japanese-national population caveat

The available island table counts registered Japanese nationals rather than all residents. Foreign residents are absent from the Ishigaki numerator.

The reported density remains useful as a lower, defined register measure, but should not be quoted as a complete all-resident count.

Questions people ask

About this geographic comparison

Which is bigger, Green Island or Ishigaki Island?

Ishigaki Island is bigger, with a land area about 14.7× that of Green Island (Green Island 15.1 vs Ishigaki Island 222.2 km², or 5.83 sq mi vs 85.8 sq mi).

How big is Green Island compared to Ishigaki Island?

Ishigaki Island has 222.2 km² (85.8 sq mi) and Green Island has 15.1 km² (5.83 sq mi): the ratio is 14.7×. Conversely, Green Island has 6.8% of Ishigaki Island's area.

Does Green Island or Ishigaki Island have more people?

Ishigaki Island has 49,387 people (2024-01-01), versus 4,327 in Green Island (2025-12-31): 11.4×. In reverse, Green Island has 8.8% of Ishigaki Island's population. Green Island is 6.8% the size of Ishigaki Island — 15.1 km² vs 222.2 km² (5.83 sq mi vs 85.8 sq mi). Population is 8.8% as high; average density is 1.29× higher. Each side’s scope and reference date are set out under “Boundaries and definitions” on this page.

Is Green Island bigger than Ishigaki Island?

No. Ishigaki Island is bigger, with a land area about 14.7× that of Green Island (Green Island 15.1 vs Ishigaki Island 222.2 km², or 5.83 sq mi vs 85.8 sq mi). The area difference is 207.1 km². Ishigaki Island has 222.2 km² (85.8 sq mi) and Green Island has 15.1 km² (5.83 sq mi): the ratio is 14.7×. Conversely, Green Island has 6.8% of Ishigaki Island's area.

How many Green Islands fit inside Ishigaki?

Nearly fifteen by reported land area.

Does the Ishigaki population include foreign residents?

No. The available island-level source counts registered Japanese nationals.

Is this Ishigaki City?

No. The area and outline are limited to Ishigaki Island.

Sources

Outline data: