Average GPS coordinates for Ishigami Postcode location: 35.312, 140.227. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Ishigami on map:

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Listing cities & postcodes (3):
>> Chibaken, 290-0534 Ishigami, Ichiharashi, GPS coordinates: 35.2716,140.1607
>> Chibaken, 297-0058 Ishigami, Mobarashi, GPS coordinates: 35.4109,140.2626
>> Chibaken, 298-0256 Ishigami, Isumigun'Ootakimachi, GPS coordinates: 35.2522,140.2568