Postal Codes

311-1300 Postcode

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Postal code 311-1300 covers Oarai Machi, Ibaraki Ken. A Japanese postal code is seven digits, written with a hyphen after the third. The figures below describe the municipality this code falls in — Japan publishes by municipality, not by postal code.

Municipality
Ōarai-machi
In Japanese
大洗町
Residents
15,696
Population density
657.0 /km²
Prefecture
Ibaraki Ken

Where 311-1300 is

Ōarai-machi, Ibaraki Ken — the point recorded for this postal code. It marks the centre of the code, not its boundary.

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People
Residents15,696
Population density657.0 /km²
Where this code is
MunicipalityŌarai-machi
In Japanese大洗町
PrefectureIbaraki Ken
Area23.89 km²

Population and area by municipality, from Wikidata under CC0, joined to postal codes through the dantai code. GeoNames romanises Japanese place names and Japan's own statistics are keyed in kanji, so the join is by name within a prefecture rather than by a shared identifier. Figures describe the whole municipality, not the postal code.

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