Gjennomsnittlig GPS-koordinater for postnummer 306-0602: 36.074, 139.926
Notering byer:
>> Heihachishinden 306-0602, Ibarakiken, Iwaishi, GPS-koordinater: 36.0743,139.9256
Notering byer:
>> Heihachishinden 306-0602, Ibarakiken, Iwaishi, GPS-koordinater: 36.0743,139.9256