diff --git a/jageocoder_converter/postcoder.py b/jageocoder_converter/postcoder.py
index 6bb571f..f5f62e1 100755
--- a/jageocoder_converter/postcoder.py
+++ b/jageocoder_converter/postcoder.py
@@ -74,6 +74,9 @@ def load_file(self) -> None:
                         for args in reader:
                             citycode, postalcode, oaza = \
                                 args[0], args[2], args[8]
+                            if citycode not in self.jiscodes:
+                                continue
+
                             if '掲載がない' in oaza:
                                 oaza = ''