diff --git a/src/main/java/org/codelibs/fess/Constants.java b/src/main/java/org/codelibs/fess/Constants.java
index af3c661f3..4ef69a9d4 100644
--- a/src/main/java/org/codelibs/fess/Constants.java
+++ b/src/main/java/org/codelibs/fess/Constants.java
@@ -37,6 +37,8 @@ public class Constants extends CoreLibConstants {
 
     public static final String SCORE = "score";
 
+    public static final String SEARCHER = "searcher";
+
     public static final String ON = "on";
 
     public static final String READY = "ready";
diff --git a/src/main/java/org/codelibs/fess/rank/fusion/DefaultSearcher.java b/src/main/java/org/codelibs/fess/rank/fusion/DefaultSearcher.java
index 8397bbd6e..a2a80b535 100644
--- a/src/main/java/org/codelibs/fess/rank/fusion/DefaultSearcher.java
+++ b/src/main/java/org/codelibs/fess/rank/fusion/DefaultSearcher.java
@@ -20,6 +20,7 @@ import java.util.Map;
 
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
+import org.codelibs.core.collection.ArrayUtil;
 import org.codelibs.core.stream.StreamUtil;
 import org.codelibs.fess.Constants;
 import org.codelibs.fess.entity.SearchRequestParams;
@@ -30,6 +31,7 @@ import org.codelibs.fess.mylasta.action.FessUserBean;
 import org.codelibs.fess.mylasta.direction.FessConfig;
 import org.codelibs.fess.rank.fusion.SearchResult.SearchResultBuilder;
 import org.codelibs.fess.util.ComponentUtil;
+import org.codelibs.fess.util.DocumentUtil;
 import org.codelibs.fess.util.FacetResponse;
 import org.dbflute.optional.OptionalEntity;
 import org.dbflute.optional.OptionalThing;
@@ -188,6 +190,14 @@ public class DefaultSearcher extends RankFusionSearcher {
         if (!docMap.containsKey(fessConfig.getIndexFieldId())) {
             docMap.put(fessConfig.getIndexFieldId(), searchHit.getId());
         }
+
+        final String[] searchers = DocumentUtil.getValue(docMap, Constants.SEARCHER, String[].class);
+        if (searchers != null) {
+            docMap.put(Constants.SEARCHER, ArrayUtil.add(searchers, getName()));
+        } else {
+            docMap.put(Constants.SEARCHER, new String[] { getName() });
+        }
+
         return docMap;
     }
 
diff --git a/src/main/java/org/codelibs/fess/rank/fusion/RankFusionSearcher.java b/src/main/java/org/codelibs/fess/rank/fusion/RankFusionSearcher.java
index ee821ca7e..5160a1ffb 100644
--- a/src/main/java/org/codelibs/fess/rank/fusion/RankFusionSearcher.java
+++ b/src/main/java/org/codelibs/fess/rank/fusion/RankFusionSearcher.java
@@ -15,11 +15,22 @@
  */
 package org.codelibs.fess.rank.fusion;
 
+import java.util.Locale;
+
+import org.codelibs.core.lang.StringUtil;
 import org.codelibs.fess.entity.SearchRequestParams;
 import org.codelibs.fess.mylasta.action.FessUserBean;
 import org.dbflute.optional.OptionalThing;
 
 public abstract class RankFusionSearcher {
+    protected String name;
+
+    public String getName() {
+        if (name == null) {
+            name = StringUtil.decamelize(this.getClass().getSimpleName().replace("Searcher", StringUtil.EMPTY)).toLowerCase(Locale.ENGLISH);
+        }
+        return name;
+    }
 
     protected abstract SearchResult search(String query, SearchRequestParams params, OptionalThing<FessUserBean> userBean);