diff --git a/hbase0.98/hbase-common-0.98/src/main/java/com/kakao/hbase/specific/CommandAdapter.java b/hbase0.98/hbase-common-0.98/src/main/java/com/kakao/hbase/specific/CommandAdapter.java
index 4065020..fe86708 100644
--- a/hbase0.98/hbase-common-0.98/src/main/java/com/kakao/hbase/specific/CommandAdapter.java
+++ b/hbase0.98/hbase-common-0.98/src/main/java/com/kakao/hbase/specific/CommandAdapter.java
@@ -212,6 +212,8 @@ public static boolean mergeRegions(Args args, HBaseAdmin admin,
         HRegionInfo regionA, HRegionInfo regionB) throws IOException {
         long timestamp = System.currentTimeMillis();
 
+        assert regionA.getTable().equals(regionB.getTable());
+
         if (HRegionInfo.areAdjacent(regionA, regionB)) {
             admin.mergeRegions(regionA.getEncodedNameAsBytes(), regionB.getEncodedNameAsBytes(), false);
             Util.printVerboseMessage(args, "CommandAdapter.mergeRegions", timestamp);
@@ -299,4 +301,4 @@ public static Map<String, Map<String, String>> versionedRegionMap(HBaseAdmin adm
     public static ServerName create(String serverNameStr) {
         return ServerName.valueOf(serverNameStr);
     }
-}
\ No newline at end of file
+}
diff --git a/hbase0.98/hbase-manager-0.98/src/test/java/com/kakao/hbase/manager/command/MergeEmptyFastTest2.java b/hbase0.98/hbase-manager-0.98/src/test/java/com/kakao/hbase/manager/command/MergeEmptyFastTest2.java
index 851ac01..79bc61b 100644
--- a/hbase0.98/hbase-manager-0.98/src/test/java/com/kakao/hbase/manager/command/MergeEmptyFastTest2.java
+++ b/hbase0.98/hbase-manager-0.98/src/test/java/com/kakao/hbase/manager/command/MergeEmptyFastTest2.java
@@ -17,6 +17,7 @@
 package com.kakao.hbase.manager.command;
 
 import com.kakao.hbase.ManagerArgs;
+import com.kakao.hbase.TestBase;
 import com.kakao.hbase.common.Args;
 import com.kakao.hbase.common.Constant;
 import org.apache.hadoop.hbase.HRegionInfo;
@@ -88,4 +89,32 @@ public void testMergeEmptyFast6() throws Exception {
         regionInfoList = getRegionInfoList(tableName);
         assertEquals(1, regionInfoList.size());
     }
+
+    @Test
+    public void testMergeMultipleTables() throws Exception {
+        makeTestData7();
+
+        String tableName2 = TestBase.tableName + "2";
+        String tableName3 = TestBase.tableName + "3";
+
+        List<HRegionInfo> regionInfoList;
+
+        // merge
+        String[] argsParam = {"zookeeper", ".*", "empty-FAST", "--force-proceed"
+                , "--test", "--verbose", "--debug", "--max-iteration", "2"};
+        Args args = new ManagerArgs(argsParam);
+        Merge command = new Merge(admin, args);
+        command.run();
+
+        // check
+        Thread.sleep(Constant.SMALL_WAIT_INTERVAL_MS);
+        regionInfoList = getRegionInfoList(tableName);
+        assertEquals(1, regionInfoList.size());
+
+        regionInfoList = getRegionInfoList(tableName2);
+        assertEquals(1, regionInfoList.size());
+
+        regionInfoList = getRegionInfoList(tableName3);
+        assertEquals(1, regionInfoList.size());
+    }
 }
diff --git a/hbase0.98/hbase-manager-0.98/src/test/java/com/kakao/hbase/manager/command/MergeEmptyTest2.java b/hbase0.98/hbase-manager-0.98/src/test/java/com/kakao/hbase/manager/command/MergeEmptyTest2.java
index 35c057d..89bae74 100644
--- a/hbase0.98/hbase-manager-0.98/src/test/java/com/kakao/hbase/manager/command/MergeEmptyTest2.java
+++ b/hbase0.98/hbase-manager-0.98/src/test/java/com/kakao/hbase/manager/command/MergeEmptyTest2.java
@@ -17,6 +17,7 @@
 package com.kakao.hbase.manager.command;
 
 import com.kakao.hbase.ManagerArgs;
+import com.kakao.hbase.TestBase;
 import com.kakao.hbase.common.Args;
 import com.kakao.hbase.common.Constant;
 import org.apache.hadoop.hbase.HRegionInfo;
@@ -93,4 +94,32 @@ public void testMergeEmpty6() throws Exception {
         regionInfoList = getRegionInfoList(tableName);
         assertEquals(1, regionInfoList.size());
     }
+
+    @Test
+    public void testMergeMultipleTables() throws Exception {
+        makeTestData7();
+
+        String tableName2 = TestBase.tableName + "2";
+        String tableName3 = TestBase.tableName + "3";
+
+        List<HRegionInfo> regionInfoList;
+
+        // merge
+        String[] argsParam = {"zookeeper", ".*", "empty", "--force-proceed"
+                , "--test", "--verbose", "--debug", "--max-iteration", "2"};
+        Args args = new ManagerArgs(argsParam);
+        Merge command = new Merge(admin, args);
+        command.run();
+
+        // check
+        Thread.sleep(Constant.SMALL_WAIT_INTERVAL_MS);
+        regionInfoList = getRegionInfoList(tableName);
+        assertEquals(1, regionInfoList.size());
+
+        regionInfoList = getRegionInfoList(tableName2);
+        assertEquals(1, regionInfoList.size());
+
+        regionInfoList = getRegionInfoList(tableName3);
+        assertEquals(1, regionInfoList.size());
+    }
 }
diff --git a/hbase0.98/hbase-manager-0.98/src/test/java/com/kakao/hbase/manager/command/MergeTestBase.java b/hbase0.98/hbase-manager-0.98/src/test/java/com/kakao/hbase/manager/command/MergeTestBase.java
index 80fb3c9..b6700e2 100644
--- a/hbase0.98/hbase-manager-0.98/src/test/java/com/kakao/hbase/manager/command/MergeTestBase.java
+++ b/hbase0.98/hbase-manager-0.98/src/test/java/com/kakao/hbase/manager/command/MergeTestBase.java
@@ -122,4 +122,28 @@ protected void makeTestData6() throws Exception {
         regionInfoList = getRegionInfoList(tableName);
         assertEquals(11, regionInfoList.size());
     }
+
+    protected void makeTestData7() throws Exception {
+        List<HRegionInfo> regionInfoList;
+
+        // create tables
+        String tableName2 = createAdditionalTable(TestBase.tableName + "2");
+        String tableName3 = createAdditionalTable(TestBase.tableName + "3");
+
+        // split tables
+        splitTable(tableName, "a".getBytes());
+        splitTable(tableName, "b".getBytes());
+        regionInfoList = getRegionInfoList(tableName);
+        assertEquals(3, regionInfoList.size());
+
+        splitTable(tableName2, "a".getBytes());
+        splitTable(tableName2, "b".getBytes());
+        regionInfoList = getRegionInfoList(tableName2);
+        assertEquals(3, regionInfoList.size());
+
+        splitTable(tableName3, "a".getBytes());
+        splitTable(tableName3, "b".getBytes());
+        regionInfoList = getRegionInfoList(tableName3);
+        assertEquals(3, regionInfoList.size());
+    }
 }
diff --git a/hbase0.98/hbase-table-stat-0.98/src/main/java/com/kakao/hbase/stat/load/TableInfo.java b/hbase0.98/hbase-table-stat-0.98/src/main/java/com/kakao/hbase/stat/load/TableInfo.java
index 3dc15d7..7e679ba 100644
--- a/hbase0.98/hbase-table-stat-0.98/src/main/java/com/kakao/hbase/stat/load/TableInfo.java
+++ b/hbase0.98/hbase-table-stat-0.98/src/main/java/com/kakao/hbase/stat/load/TableInfo.java
@@ -114,8 +114,13 @@ private void initializeRegionServerMap() throws Exception {
             regionServerMap = CommandAdapter.regionServerMap(args, admin.getConfiguration()
                 , admin.getConnection(), false);
         } else {
-            regionServerMap = CommandAdapter.regionServerMap(args, admin.getConfiguration()
-                , admin.getConnection(), tables, false);
+            if (isMultiTable()) {
+                regionServerMap = CommandAdapter.regionServerMap(args, admin.getConfiguration(),
+                        admin.getConnection(), tables, false);
+            } else {
+                regionServerMap = CommandAdapter.regionServerMap(args, admin.getConfiguration(),
+                        admin.getConnection(), new TreeSet<>(Collections.singletonList(tableName)), false);
+            }
         }
         clean(regionServerMap);