Reduce the list, select first 2 letters of the city:
Listing cities (153 place(s)). Select the City to see the postcode(s):
Listing cities (153 place(s)). Select the City to see the postcode(s):
Position: Postcodes > Japan > Yamaguchiken > H.... >
Postcode finder: Japan, List of the cities starting with H. Japan Yamaguchiken Postcodes (Desktop version).