Average GPS coordinates for Seto Postcode location: 34.959, 134.067. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Seto on map:

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Listing cities & postcodes (3):
>> Okayamaken, 708-0325 Seto, Tomatagunkagaminochou, GPS coordinates: 35.0967,133.9275
>> Okayamaken, 709-0861 Seto, Akaiwagunsetochou, GPS coordinates: 34.736,134.038
>> Okayamaken, 709-4221 Seto, Aidagunsakutouchou, GPS coordinates: 35.0455,134.2356