diff --git a/gbizinfo_lod/mappers/_katsudo.py b/gbizinfo_lod/mappers/_katsudo.py
index b9e2fdb..74efcba 100644
--- a/gbizinfo_lod/mappers/_katsudo.py
+++ b/gbizinfo_lod/mappers/_katsudo.py
@@ -8,7 +8,7 @@ class GbizInfoKatsudoMapper(CSV2RDFMapper):
     @staticmethod
     def map_to_triples(row: dict[str, str]) -> list[_TripleMapType]:
         s = HJ_DATA[row["ID-識別値"]]
-        ss = HJ_EXT[f"{row['ID-識別値']}_{row['キー情報']}"]
+        ss = HJ_EXT[f"{row['ID-識別値']}_{row['キー情報'].strip("\ufeff\"")}"]
 
         triples = [
             (s, HJ.法人活動情報, ss),
diff --git a/gbizinfo_lod/mappers/chotatsu.py b/gbizinfo_lod/mappers/chotatsu.py
index 9666f95..219f135 100644
--- a/gbizinfo_lod/mappers/chotatsu.py
+++ b/gbizinfo_lod/mappers/chotatsu.py
@@ -14,7 +14,7 @@ class GbizInfoChotatsuMapper(GbizInfoKatsudoMapper):
 
     @staticmethod
     def map_to_triples(row: dict[str, str]) -> list[_TripleMapType]:
-        ss = HJ_EXT[f"{row['ID-識別値']}_{row['キー情報']}"]
+        ss = HJ_EXT[f"{row['ID-識別値']}_{row['キー情報'].strip("\ufeff\"")}"]
 
         triples = GbizInfoKatsudoMapper.map_to_triples(row)
         triples.extend(