diff --git a/feature/library/src/main/java/one/nem/lacerta/feature/library/LibraryTopFragment.java b/feature/library/src/main/java/one/nem/lacerta/feature/library/LibraryTopFragment.java
index 39886d6a..59c1b559 100644
--- a/feature/library/src/main/java/one/nem/lacerta/feature/library/LibraryTopFragment.java
+++ b/feature/library/src/main/java/one/nem/lacerta/feature/library/LibraryTopFragment.java
@@ -106,7 +106,7 @@ public class LibraryTopFragment extends Fragment {
         List<DocumentMeta> folderDocuments = folderManager.getDocumentsInFolder("Default Folder");
 
         // トーストメッセージでドキュメントの数を表示
-        Toast.makeText(getContext(), "Documents: " + Integer.toString(metas.size()), Toast.LENGTH_LONG).show();
+        Toast.makeText(getContext(), "ドキュメント数: " + Integer.toString(metas.size()), Toast.LENGTH_LONG).show();
 
 // Create and set the adapter
         DocumentAdapter adapter = new DocumentAdapter(metas);