diff --git a/sudachipy/dictionarylib/doublearraylexicon.py b/sudachipy/dictionarylib/doublearraylexicon.py
index 6e1a7ce..fb77ee8 100644
--- a/sudachipy/dictionarylib/doublearraylexicon.py
+++ b/sudachipy/dictionarylib/doublearraylexicon.py
@@ -78,14 +78,22 @@ def size(self) -> int:
         return self.word_params.size
 
     def get_word_id(self, headword: str, pos_id: int, reading_form: str) -> int:
+        for wid, _ in self.lookup(headword.encode('utf-8'), 0):
+            if self._compare_word_id(wid, headword, pos_id, reading_form):
+                return wid
+
         for wid in range(self.word_infos.size()):
-            info = self.word_infos.get_word_info(wid)
-            if info.surface == headword \
-                    and info.pos_id == pos_id \
-                    and info.reading_form == reading_form:
+            if self._compare_word_id(wid, headword, pos_id, reading_form):
                 return wid
+
         return -1
 
+    def _compare_word_id(self, wid: int, headword: str, pos_id: int, reading_form: str) -> bool:
+        info = self.word_infos.get_word_info(wid)
+        return info.surface == headword \
+            and info.pos_id == pos_id \
+            and info.reading_form == reading_form
+
     def get_dictionary_id(self, word_id: int) -> int:
         return 0