Reduce the list, select first 2 letters of the city:
Listing cities (233 place(s)). Select the City to see the postcode(s):
Listing cities (233 place(s)). Select the City to see the postcode(s):
Position: Postcodes > Japan > Fukushimaken > N.... >
Postcode finder: Japan, List of the cities starting with N. Japan Fukushimaken Postcodes (Desktop version).