Thailand is 1.38× the size of Japan

Thailand covers about 514,000 km² (199,000 mi²) and Japan about 374,000 km² (144,000 mi²). Below, both outlines are drawn at one scale and centred on each other.

514,000km²Thailand
374,000km²Japan

500 km

Thailand
Japan

What fits

Japan is 73% of the size of Thailand.
Thailand is larger by 141,000 km² (54,400 mi²), which is 38% of the area of Japan.
Measured in Belgiums: Thailand is about 16.8, Japan about 12.2.

How they differ

Thailand is larger, but Japan has the larger population: 123.8 million against 66.2 million, 1.87× as many people.
Per square kilometre that is 331 in Japan against 129 in Thailand: Japan is 2.58× as densely populated.
Their centres are about 4,370 km apart.
On a standard web map Japan looks larger than Thailand: Thailand at 15°N is drawn about 1.1× too large and Japan at 37°N about 1.6×, so the map shows Japan as 1.07× the size of Thailand, when Thailand is 1.38× the size of Japan.
Together Thailand and Japan cover 888,000 km², close to the size of Pakistan (873,000 km², 1.7% smaller).
The gap between them, 141,000 km², is about the size of Tajikistan (142,000 km²).
At Japan's density, Thailand would have 170.5 million people (it has 66.2 million). At Thailand's density, Japan would have 48.1 million (it has 123.8 million).
Japan's centre is 22.3° of latitude, about 2,480 km, farther north than Thailand's.

Who wins on what

Measure	Winner	By
Larger area	Thailand	1.38×
More people	Japan	1.87×
More crowded	Japan	2.58×
Farther north	Japan	22.3° of latitude
Stretched more on a web map	Japan	1.6× against 1.1×

Both against the same yardsticks

Yardstick	Thailand	Japan
Belgium 30,700 km²	16.8×	12.2×
United Kingdom 244,000 km²	2.11×	1.53×
Germany 358,000 km²	1.44×	1.04×
France 548,000 km²	0.94×	0.68×
India 3,151,000 km²	0.16×	0.12×
Brazil 8,473,000 km²	0.06×	0.04×
United States 9,447,000 km²	0.05×	0.04×
Russia 16,980,000 km²	0.03×	0.02×

Each figure is the place's area divided by the yardstick's.

Side by side

	Thailand	Japan
Area, main territory	514,000 km²199,000 mi²	374,000 km²144,000 mi²
Population	66.2 millionWikidata, 2017	123.8 millionWikidata, 2024
Density	129 per km²	331 per km²
Official area	513,000 km²Wikidata	378,000 km²Wikidata
Capital	Bangkok	Tokyo
Latitude range	6°N to 20°N	24°N to 46°N
Continent	Asia	Asia

Population: Wikidata 2017 and Wikidata 2024, covering each whole country. Official figures: Wikidata (CC0).

Wikidata's official figure of 513,000 km² agrees with our measured area of 514,000 km², to within 2%.
Wikidata's official figure of 378,000 km² agrees with our measured area of 374,000 km², to within 2%.

Similar in size to Thailand

Similar in size to Japan

More comparisons

Sources and method

Outlines: Natural Earth, 1:10m Admin 0 - Countries, public domain
Boundary: De facto, as drawn by Natural Earth. Main territory: the largest landmass and every part within 1,000 km of it.
Area: Measured on the WGS84 ellipsoid from the full-detail outlines, shown rounded. Comparisons use main-territory area.
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: 2026-11-11

Full method