diff --git a/src/osm/jp/postgis/CoverageAll.java b/src/osm/jp/postgis/CoverageAll.java
index 2491854..8525c81 100644
--- a/src/osm/jp/postgis/CoverageAll.java
+++ b/src/osm/jp/postgis/CoverageAll.java
@@ -8,6 +8,7 @@
 import java.io.FileReader;
 import java.io.IOException;
 import java.io.OutputStreamWriter;
+import java.io.StringReader;
 import java.io.UnsupportedEncodingException;
 import java.sql.Connection;
 import java.sql.PreparedStatement;
@@ -19,6 +20,7 @@
 import java.util.ArrayList;
 import javax.json.Json;
 import javax.json.JsonObject;
+import javax.json.JsonReader;
 import javax.json.JsonValue;
 import jp.co.areaweb.tools.csv.CsvFile;
 import jp.co.areaweb.tools.csv.CsvRecord;
@@ -74,13 +76,12 @@
                 BufferedReader br = new BufferedReader(fr)) 
             {
                 while((tmp=br.readLine()) != null){
-                    System.out.println(tmp);
-                    JsonValue v = Json.createValue(tmp);
-                    if (v != null) {
-                        JsonObject obj = (JsonObject)v;
-                        dateStr = obj.getString("date");
-                        return;
-                    }
+                    
+                    JsonReader jsonReader = Json.createReader(new StringReader(tmp));
+                    JsonObject obj = jsonReader.readObject();
+                    dateStr = obj.getString("date");
+                    System.out.println(dateStr);
+                    return;
                 }
             }
         }