Prosečne GPS koordinate za poštanski broj 306-0621: 36.014, 139.911
Spisak gradova:
>> Ooyaguchi 306-0621, Ibarakiken, Iwaishi, GPS koordinate: 36.0141,139.911
Spisak gradova:
>> Ooyaguchi 306-0621, Ibarakiken, Iwaishi, GPS koordinate: 36.0141,139.911