diff --git a/component/scanner/src/main/java/one/nem/lacerta/component/scanner/ScannerDataManagerStubFragment.java b/component/scanner/src/main/java/one/nem/lacerta/component/scanner/ScannerDataManagerStubFragment.java
index 04568e36..05b8dea8 100644
--- a/component/scanner/src/main/java/one/nem/lacerta/component/scanner/ScannerDataManagerStubFragment.java
+++ b/component/scanner/src/main/java/one/nem/lacerta/component/scanner/ScannerDataManagerStubFragment.java
@@ -36,6 +36,8 @@ import java.util.Locale;
  */
 public class ScannerDataManagerStubFragment extends Fragment {
 
+    // TODO-rca: 時間があったらcacheを使うようにする？
+
     // Results
     private ArrayList<CapturedData> results = new ArrayList<>();