diff --git a/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/trace/Alias.java b/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/trace/Alias.java
index 4ffeaff..e2ce931 100644
--- a/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/trace/Alias.java
+++ b/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/trace/Alias.java
@@ -32,8 +32,7 @@
 	public static final int OCCURRENCE_EXP_ARRAY = 1;
 	public static final int OCCURRENCE_EXP_FIRST_ARG = 1;
 	public static final int OCCURRENCE_EXP_RETURN = -1;
-	
-	
+
 	public Alias(String objectId, TracePoint occurrencePoint, int occurrenceExp) {
 		this.objectId = objectId;
 		this.occurrencePoint = occurrencePoint;
@@ -55,6 +54,11 @@
 	public MethodExecution getMethodExecution() {
 		return occurrencePoint.getMethodExecution();
 	}
+	
+	public String getMethodExecutionClassName() {
+		MethodExecution methodExecution = occurrencePoint.getMethodExecution();
+		return Trace.getDeclaringType(methodExecution.getSignature(), methodExecution.isConstructor());
+	}
 
 	public String getMethodSignature() {
 		return occurrencePoint.getMethodExecution().getCallerSideSignature();
@@ -152,6 +156,32 @@
 		}
 		return className;
 	}
+	
+	public String getOccurrenceText() {		
+		String statementType = getStatementType();
+		switch (statementType) {
+		case "FieldAccess":
+		case "FieldUpdate":
+			return (occurrenceExp == 0) ? "container" : "field";
+		case "ArrayAccess":
+		case "ArrayUpdate":
+			return (occurrenceExp == 0) ? "arrayObject" : "arrayValue";
+		case "ArrayCreate":
+			return "return";
+		case "MethodInvocation":
+			if (occurrenceExp <= 0) {
+				return (occurrenceExp == 0) ? "receiver" : "return";
+			}
+			final String[] ORDER_TEXT = {"th", "st", "nd", "rd", "th", "th", "th", "th", "th", "th", "th", "th", "th", "th"}; // 0-13�ɑΉ�
+			final String ARG = " arg";
+			if (occurrenceExp % 100 >= ORDER_TEXT.length) {
+				return occurrenceExp + ORDER_TEXT[occurrenceExp % 10] + ARG; // ��2����14�ȏ�Ȃ�, ��1���̐����ɑΉ�������
+			} else if (occurrenceExp % 100 >= 0) {
+				return occurrenceExp + ORDER_TEXT[occurrenceExp % 100] + ARG; // ��2����0�ȏ�13�ȉ��Ȃ�, ��2���̐����ɑΉ�������
+			}
+		}
+		return String.valueOf(occurrenceExp);
+	}
 
 	@Override
 	public String toString() {
diff --git a/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/trace/TraceJSON.java b/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/trace/TraceJSON.java
index 7a5037c..71608fc 100644
--- a/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/trace/TraceJSON.java
+++ b/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/trace/TraceJSON.java
@@ -1006,29 +1006,59 @@
 			Statement statement = statements.get(i);
 			if (statement instanceof FieldAccess) {
 				FieldAccess fa = (FieldAccess)statement;
-				startAliasList.add(new Alias(fa.getContainerObjId(), tp, Alias.OCCURRENCE_EXP_CONTAINER));
-				startAliasList.add(new Alias(fa.getValueObjId(), tp, Alias.OCCURRENCE_EXP_FIELD));
+				String objId = fa.getContainerObjId();
+				if (!("0".equals(objId))) {
+					startAliasList.add(new Alias(objId, tp, Alias.OCCURRENCE_EXP_CONTAINER));	
+				}
+				objId = fa.getValueObjId();
+				if ((!"0".equals(objId))) {
+					startAliasList.add(new Alias(objId, tp, Alias.OCCURRENCE_EXP_FIELD));	
+				}
 			} else if (statement instanceof FieldUpdate) {
 				FieldUpdate fu = (FieldUpdate)statement;
-				startAliasList.add(new Alias(fu.getContainerObjId(), tp, Alias.OCCURRENCE_EXP_CONTAINER));
-				startAliasList.add(new Alias(fu.getValueObjId(), tp, Alias.OCCURRENCE_EXP_FIELD));
+				String objId = fu.getContainerObjId();
+				if ((!"0".equals(objId))) {
+					startAliasList.add(new Alias(objId, tp, Alias.OCCURRENCE_EXP_CONTAINER));	
+				}
+				objId = fu.getValueObjId();
+				if ((!"0".equals(objId))) {
+					startAliasList.add(new Alias(objId, tp, Alias.OCCURRENCE_EXP_FIELD));	
+				}
 			} else if (statement instanceof ArrayAccess) {
 				String valueObjId = ((ArrayAccess)statement).getValueObjectId();
-				startAliasList.add(new Alias(valueObjId, tp, Alias.OCCURRENCE_EXP_ARRAY));
+				if (!("0".equals(valueObjId))) {
+					startAliasList.add(new Alias(valueObjId, tp, Alias.OCCURRENCE_EXP_ARRAY));	
+				}
 			} else if (statement instanceof ArrayUpdate) {
 				String valueObjId = ((ArrayUpdate)statement).getValueObjectId();
-				startAliasList.add(new Alias(valueObjId, tp, Alias.OCCURRENCE_EXP_ARRAY));
+				if (!("0".equals(valueObjId))) {
+					startAliasList.add(new Alias(valueObjId, tp, Alias.OCCURRENCE_EXP_ARRAY));	
+				}
 			} else if (statement instanceof ArrayCreate) {
 				String valueObjId = ((ArrayAccess)statement).getValueObjectId();
-				startAliasList.add(new Alias(valueObjId, tp, Alias.OCCURRENCE_EXP_RETURN));
+				if (!("0".equals(valueObjId))) {
+					startAliasList.add(new Alias(valueObjId, tp, Alias.OCCURRENCE_EXP_RETURN));	
+				}
 			} else if (statement instanceof MethodInvocation) {
 				MethodExecution calledMe = ((MethodInvocation)statement).getCalledMethodExecution();
-				startAliasList.add(new Alias(calledMe.getThisObjId(), tp, Alias.OCCURRENCE_EXP_RECEIVER));
+				String thisObjId = calledMe.getThisObjId();
+				if (!("0".equals(thisObjId))) {
+					startAliasList.add(new Alias(thisObjId, tp, Alias.OCCURRENCE_EXP_RECEIVER));	
+				}
 				List<ObjectReference> args = calledMe.getArguments();
 				for (int j = 0; j < args.size(); j++) {
-					startAliasList.add(new Alias(args.get(j).getId(), tp, (j + Alias.OCCURRENCE_EXP_FIRST_ARG)));
+					String argValueId = args.get(j).getId();
+					if (!("0".equals(argValueId))) {
+						startAliasList.add(new Alias(argValueId, tp, (j + Alias.OCCURRENCE_EXP_FIRST_ARG)));	
+					}
 				}
-				startAliasList.add(new Alias(calledMe.getReturnValue().getId(), tp, Alias.OCCURRENCE_EXP_RETURN));
+				ObjectReference returnValue = calledMe.getReturnValue();
+				if (returnValue != null) {
+					String returnValueId = returnValue.getId();
+					if (!("0".equals(returnValueId))) {
+						startAliasList.add(new Alias(returnValueId, tp, Alias.OCCURRENCE_EXP_RETURN));
+					}
+				}
 			}
 		}
 		return startAliasList;
@@ -1046,15 +1076,15 @@
 		String objId = startAlias.getObjectId();
 		TracePoint tp = startAlias.getOccurrencePoint().duplicate();
 		ArrayList<ArrayList<Alias>> resultLists = getObjectFlow(aliasLists, objId, tp, 0);
-		for (int i = 0; i < resultLists.size(); i++) {
-			ArrayList<Alias> resultList = resultLists.get(i);
-			System.out.println("---------------------------------------------------------");		// �m�F�p
-			for (Alias alias : resultList) System.out.println(alias);								// �m�F�p
+//		for (int i = 0; i < resultLists.size(); i++) {
+//			ArrayList<Alias> resultList = resultLists.get(i);
+//			System.out.println("---------------------------------------------------------");		// �m�F�p
+//			for (Alias alias : resultList) System.out.println(alias);								// �m�F�p
 //			int lastAliasOccurrenceEXP = resultList.get(resultList.size() - 1).getOccurrenceExp();
 //			if (lastAliasOccurrenceEXP != Alias.OCCURRENCE_EXP_RETURN) {
 //				resultLists.remove(resultList); // �����̃G�C���A�X���z�񐶐���R���X�g���N�^�Ăяo���ł͂Ȃ����X�g���폜����
 //			}
-		}
+//		}
 		return resultLists;
 	}
 
@@ -1099,7 +1129,6 @@
 					// �߂�l�ɃG�C���A�X�̃I�u�W�F�N�gID����v�����ꍇ
 					aliasList.add(new Alias(objId, tp.duplicate(), Alias.OCCURRENCE_EXP_RETURN));
 					if (calledMethodExecution.isConstructor()) {
-						System.out.println("return (Constructor)");
 						return aliasLists; // �R���X�g���N�^�Ăяo���ӏ��̓G�C���A�X�̋N���Ȃ̂ł���ȑO�ɂ͂����Ȃ��͂�
 					}
 					TracePoint exitTp = calledMethodExecution.getExitPoint(); // �Ăяo�����\�b�h���s�̍ŏI�X�e�[�g�����g���w��tp���擾