diff --git a/src/osm/jp/coverage/fuel/DbFuel.java b/src/osm/jp/coverage/fuel/DbFuel.java
index 23984ac..6c9e92c 100644
--- a/src/osm/jp/coverage/fuel/DbFuel.java
+++ b/src/osm/jp/coverage/fuel/DbFuel.java
@@ -31,8 +31,10 @@
      * @throws org.xml.sax.SAXException */
     public static void main(String[] args) throws FileNotFoundException, ClassNotFoundException, IOException, SQLException, ParserConfigurationException, SAXException 
     {
-        if ((args.length > 1) && args[0].equals("-update")) {
-            UPDATE = true;
+        for (String arg : args) {
+            if (arg.toUpperCase().equals("-UPDATE")) {
+                UPDATE = true;
+            }
         }
         
         // HSQLディレクトリがなければエラー
@@ -46,7 +48,9 @@
         try {
             // DB.tableを作成
             con = DatabaseTool.openDb("database");
-            create(con);
+            if (!UPDATE) {
+                create(con);
+            }
             
             try (PreparedStatement ps = con.prepareStatement("DELETE FROM "+ TABLE_NAME)) {
                 ps.executeUpdate();