Index: trunk/src/org/openstreetmap/josm/data/osm/OsmPrimitive.java
===================================================================
--- trunk/src/org/openstreetmap/josm/data/osm/OsmPrimitive.java	(revision 6232)
+++ trunk/src/org/openstreetmap/josm/data/osm/OsmPrimitive.java	(revision 6233)
@@ -650,10 +650,47 @@
         if (discardable == null) {
             discardable = Main.pref.getCollection("tags.discardable",
-                    Arrays.asList("created_by",
-                            "tiger:upload_uuid", "tiger:tlid", "tiger:source", "tiger:separated",
-                            "geobase:datasetName", "geobase:uuid", "sub_sea:type",
-                            "odbl", "odbl:note", "SK53_bulk:load",
-                            "yh:LINE_NAME", "yh:LINE_NUM", "yh:STRUCTURE", "yh:TOTYUMONO",
-                            "yh:TYPE", "yh:WIDTH_RANK"));
+                    Arrays.asList(
+                            "created_by",
+                            "geobase:datasetName",
+                            "geobase:uuid",
+                            "KSJ2:ADS",
+                            "KSJ2:ARE",
+                            "KSJ2:AdminArea",
+                            "KSJ2:COP_label",
+                            "KSJ2:DFD",
+                            "KSJ2:INT",
+                            "KSJ2:INT_label",
+                            "KSJ2:LOC",
+                            "KSJ2:LPN",
+                            "KSJ2:OPC",
+                            "KSJ2:PubFacAdmin",
+                            "KSJ2:RAC",
+                            "KSJ2:RAC_label",
+                            "KSJ2:RIC",
+                            "KSJ2:RIN",
+                            "KSJ2:WSC",
+                            "KSJ2:coordinate",
+                            "KSJ2:curve_id",
+                            "KSJ2:curve_type",
+                            "KSJ2:filename",
+                            "KSJ2:lake_id",
+                            "KSJ2:lat",
+                            "KSJ2:long",
+                            "KSJ2:river_id",
+                            "odbl",
+                            "odbl:note",
+                            "SK53_bulk:load",
+                            "sub_sea:type",
+                            "tiger:source",
+                            "tiger:separated",
+                            "tiger:tlid",
+                            "tiger:upload_uuid",
+                            "yh:LINE_NAME",
+                            "yh:LINE_NUM",
+                            "yh:STRUCTURE",
+                            "yh:TOTYUMONO",
+                            "yh:TYPE",
+                            "yh:WIDTH_RANK"
+                        ));
         }
         return discardable;