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The methodology used to estimate length is based on the following: 1) A country's coastline is made up of individual lines, and an individual line has two or more vertices and/or nodes. 2) The length between two vertices is calculated on the surface of a sphere.
The Pacific coastline north of Tokyo, the coast of Hokkaidō, and the Sea of Japan coast are generally unindented, with few natural harbors. [27] A recent global remote sensing analysis suggested that there were 765 km 2 of tidal flats in Japan, making it the 35th-ranked country in terms of tidal flat extent. [36]
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A nautical mile is a unit of length used in air, marine, and space navigation, and for the definition of territorial waters. [2] [3] [4] Historically, it was defined as the meridian arc length corresponding to one minute ( 1 / 60 of a degree) of latitude at the equator, so that Earth's polar circumference is very near to 21,600 nautical miles (that is 60 minutes × 360 degrees).
Length metres metres feet; shaku: 尺: 10 ⁄ 33: 0.303 0.9942 Area square metres square metres square feet tsubo: 坪: 100 ⁄ 30.25: 3.306 35.58 Volume litres litres US gallons Imperial gallons; shō: 升: 2401 ⁄ 1331: 1.804 0.4765 0.3968 Mass kilograms kilograms pounds; kan: 貫: 15 ⁄ 4: 3.750 8.267 Note: Definitions are exact and ...
The coastline paradox is the counterintuitive observation that the coastline of a landmass does not have a well-defined length. This results from the fractal curve -like properties of coastlines; i.e., the fact that a coastline typically has a fractal dimension .
Japan has a population of over 123 million as of 2025, making it the eleventh-most populous country. The capital of Japan and its largest city is Tokyo; the Greater Tokyo Area is the largest metropolitan area in the world, with more than 37 million inhabitants as of 2024. Japan is divided into 47 administrative prefectures and eight traditional ...
The extreme points of Japan include the coordinates that are the farthest north, south, east and west in Japan, and the ones that are at the highest and the lowest elevations in the country. Japan's northernmost point is disputed , because Japan considers it to be on Iturup , an island de facto governed by Russia .