Average GPS coordinates for Yamaguchi Postcode location: 34.79, 133.903. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Yamaguchi on map:

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Listing cities & postcodes (3):
>> Okayamaken, 701-2225 Yamaguchi, Akaiwagun'Akasakachou, GPS coordinates: 34.7926,133.9794
>> Okayamaken, 707-0031 Yamaguchi, Aidagunmimasakachou, GPS coordinates: 35.005,134.1989
>> Okayamaken, 714-0007 Yamaguchi, Kasaokashi, GPS coordinates: 34.5737,133.5308