Average GPS coordinates for Osaka Postcode location: 33.27, 131.482. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Osaka on map:

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Listing cities & postcodes (3):
>> Ooitaken, 872-0316 Osaka, Usagun'Innaimachi, GPS coordinates: 33.4721,131.3389
>> Ooitaken, 874-0001 Osaka, Beppushi, GPS coordinates: 33.3481,131.4886
>> Ooitaken, 879-7104 Osaka, Oonogunmiemachi, GPS coordinates: 32.9901,131.6177