Average GPS coordinates for Koyasumachi Postcode location: 35.652, 139.34. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Koyasumachi on map:

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Listing cities & postcodes (1):
>> Toukyouto, 192-0904 Koyasumachi, Hachioujishi, GPS coordinates: 35.6517,139.34