Average GPS coordinates for Aoyama Postcode location: 35.068, 136.924. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Aoyama on map:

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Listing cities & postcodes (3):
>> Aichiken, 458-0833 Aoyama, Nagoyashimidoriku, GPS coordinates: 35.0695,136.9507
>> Aichiken, 475-0836 Aoyama, Handashi, GPS coordinates: 34.8789,136.9123
>> Aichiken, 480-0201 Aoyama, Nishikasugaiguntoyoyamachou, GPS coordinates: 35.2565,136.9087