Average GPS coordinates for Oki Postcode location: 34.8, 133.914. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Oki on map:

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Listing cities & postcodes (3):
>> Okayamaken, 708-0322 Oki, Tomatagunkagaminochou, GPS coordinates: 35.091,133.9454
>> Okayamaken, 709-0855 Oki, Akaiwagunsetochou, GPS coordinates: 34.721,134.0449
>> Okayamaken, 710-0836 Oki, Kurashikishi, GPS coordinates: 34.5889,133.7531