Distance between Fukuoka, Japan and Seongnam-si, South Korea

520 km = 323 miles

We assume a spherical Earth as a close approximation of the true shape of the Earth (an oblate spheroid). The distance is calculated as great-circle or orthodromic distance between city centres on the surface of a sphere.

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Fukuoka, Japan

Country: Japan
Fukuoka’s coordinates: 33°36′00″ N, 130°25′00″ E
Population: 1,392,289
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Wikipedia article: Fukuoka

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Seongnam-si, South Korea

Country: South Korea
Seongnam-si’s coordinates: 37°26′18″ N, 127°08′16″ E
Population: 1,031,935
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Wikipedia article: Seongnam-si

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