Average GPS coordinates for Okayama Postcode location: 37.914, 139.123. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Okayama on map:

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Listing cities & postcodes (1):
>> Niigataken, 950-0821 Okayama, Niigatashi, GPS coordinates: 37.9139,139.123