Prosečne GPS koordinate za poštanski broj 990-0015: 38.23, 140.419
Spisak gradova:
>> Niiyama 990-0015, Yamagataken, Yamagatashi, GPS koordinate: 38.2299,140.419
Spisak gradova:
>> Niiyama 990-0015, Yamagataken, Yamagatashi, GPS koordinate: 38.2299,140.419