Average GPS coordinates for Onagashima Postcode location: 37.984, 140.105. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Onagashima on map:

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Listing cities & postcodes (1):
>> Yamagataken, 999-0213 Onagashima, Higashiokitamagunkawanishimachi, GPS coordinates: 37.9841,140.105