diff --git a/src/org/ntlab/traceDebugger/analyzerProvider/DeltaAlias.java b/src/org/ntlab/traceDebugger/analyzerProvider/DeltaAlias.java
new file mode 100644
index 0000000..381804c
--- /dev/null
+++ b/src/org/ntlab/traceDebugger/analyzerProvider/DeltaAlias.java
@@ -0,0 +1,15 @@
+package org.ntlab.traceDebugger.analyzerProvider;
+
+import org.ntlab.traceAnalysisPlatform.tracer.trace.TracePoint;
+
+public class DeltaAlias extends Alias {
+	boolean bSrcSide = false;
+
+	public DeltaAlias(AliasType aliasType, int index, String objectId, TracePoint occurrencePoint, boolean isSrcSide) {
+		super(aliasType, index, objectId, occurrencePoint);
+	}
+
+	public boolean isSrcSide() {
+		return bSrcSide;
+	}
+}
diff --git a/src/org/ntlab/traceDebugger/analyzerProvider/DeltaExtractorJSON.java b/src/org/ntlab/traceDebugger/analyzerProvider/DeltaExtractorJSON.java
index 9e9e56e..ce5a559 100644
--- a/src/org/ntlab/traceDebugger/analyzerProvider/DeltaExtractorJSON.java
+++ b/src/org/ntlab/traceDebugger/analyzerProvider/DeltaExtractorJSON.java
@@ -3,6 +3,7 @@
 import java.util.AbstractMap;
 import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map.Entry;
@@ -57,7 +58,8 @@
 		ObjectReference thisObj = new ObjectReference(thisObjectId, methodExecution.getThisClassName(), 
 				Trace.getDeclaringType(methodExecution.getSignature(), methodExecution.isConstructor()), Trace.getDeclaringType(methodExecution.getCallerSideSignature(), methodExecution.isConstructor()));
 		
-		HashMap<String, Alias>  aliasList = new HashMap<>();
+		HashMap<String, DeltaAlias>  srcAliasList = new HashMap<>();
+		HashMap<String, DeltaAlias>  dstAliasList = new HashMap<>();
 				
 		if (childMethodExecution == null) {
 			// �T���J�n���͈�U�폜���A�Ăяo�����̒T���𑱂���ۂɕ���������
@@ -120,11 +122,15 @@
 										
 					if (ownerObjectId.equals(thisObjectId)) {
 						// �t�B�[���h�Q�Ƃ̏ꍇ
-						if (!removeList.contains(refObjectId)) {
+						if (Collections.frequency(objList, refObjectId) > Collections.frequency(removeList, refObjectId)) {
 							// ��ԋ߂��t�B�[���h�Q�Ƃ�D�悷��
 							removeList.add(refObjectId);
 							removeList.add(thisObjectId);		// ��ň�U�AthisObject ����菜��
-							aliasList.put(refObjectId, new Alias(Alias.AliasType.FIELD, 0, refObjectId, tracePoint.duplicate()));
+							if (refObjectId.equals(srcObject.getId())) {
+								srcAliasList.put(refObjectId, new DeltaAlias(Alias.AliasType.FIELD, 0, refObjectId, tracePoint.duplicate(), true));
+							} else if (refObjectId.equals(dstObject.getId())) {
+								dstAliasList.put(refObjectId, new DeltaAlias(Alias.AliasType.FIELD, 0, refObjectId, tracePoint.duplicate(), false));
+							}
 							existsInFields++;					// set�������get�����o���Ă���”\��������
 						}
 					} else {
@@ -181,7 +187,11 @@
 					removeList.add(arrayObjectId);
 					existsInFields++;
 					removeList.add(thisObjectId);		// ��ň�U�AthisObject ����菜��
-					aliasList.put(arrayObjectId, new Alias(Alias.AliasType.ARRAY_CREATE, 0, arrayObjectId, tracePoint.duplicate()));
+					if (arrayObjectId.equals(srcObject.getId())) {
+						srcAliasList.put(arrayObjectId, new DeltaAlias(Alias.AliasType.ARRAY_CREATE, 0, arrayObjectId, tracePoint.duplicate(), true));
+					} else if (arrayObjectId.equals(dstObject.getId())) {
+						dstAliasList.put(arrayObjectId, new DeltaAlias(Alias.AliasType.ARRAY_CREATE, 0, arrayObjectId, tracePoint.duplicate(), false));
+					}
 				}
 			} else if (statement instanceof MethodInvocation) {
 				MethodExecution prevChildMethodExecution = ((MethodInvocation)statement).getCalledMethodExecution();
@@ -204,10 +214,19 @@
 								removeList.add(thisObjectId);		// ��ň�U�AthisObject ����菜��
 								((DeltaAugmentationInfo)prevChildMethodExecution.getAugmentation()).setTraceObjectId(Integer.parseInt(newObjId));		// �ǐՑΏ�
 								((DeltaAugmentationInfo)prevChildMethodExecution.getAugmentation()).setSetterSide(false);	// getter�Ăяo���Ɠ��l
-								aliasList.put(newObjId, new Alias(Alias.AliasType.CONSTRACTOR_INVOCATION, 0, newObjId, tracePoint.duplicate()));
+								if (newObjId.equals(srcObject.getId())) {
+									srcAliasList.put(newObjId, new DeltaAlias(Alias.AliasType.CONSTRACTOR_INVOCATION, 0, newObjId, tracePoint.duplicate(), true));
+								} else if (newObjId.equals(dstObject.getId())) {
+									dstAliasList.put(newObjId, new DeltaAlias(Alias.AliasType.CONSTRACTOR_INVOCATION, 0, newObjId, tracePoint.duplicate(), false));
+								}
 								continue;
 							}
 							String retObj = objList.get(retIndex);
+							if (retObj.equals(srcObject.getId())) {
+								isSrcSide = true;
+							} else if (retObj.equals(dstObject.getId())) {
+								isSrcSide = false;
+							}
 							aliasCollector.addAlias(new Alias(Alias.AliasType.METHOD_INVOCATION, 0, retObj, tracePoint.duplicate()));
 							if (removeList.contains(retObj)) {
 								// ��xget�Ō��o���ăt�B�[���h�Ɉˑ����Ă���Ɣ��f�������{���̗R�����߂�l���������Ƃ����������̂ŁA�t�B�[���h�ւ̈ˑ����L�����Z������
@@ -227,7 +246,11 @@
 									removeList.add(thisObjectId);		// ��ň�U�AthisObject ����菜��
 									isTrackingThis = true;				// �Ăяo�����T���O�ɕ���
 								}
-								aliasCollector.addAlias(new Alias(Alias.AliasType.RECEIVER, 0, objList.get(retIndex), tracePoint.duplicate()));
+								if (isSrcSide) {
+									aliasCollector.addAlias(new DeltaAlias(Alias.AliasType.RECEIVER, 0, objList.get(retIndex), tracePoint.duplicate(), true));
+								} else {
+									aliasCollector.addAlias(new DeltaAlias(Alias.AliasType.RECEIVER, 0, objList.get(retIndex), tracePoint.duplicate(), false));
+								}
 							}
 							if (isLost) {
 								checkList.add(objList.get(retIndex));
@@ -259,22 +282,27 @@
 				objList.remove(removeId);		// �ǐՑΏۂ���O��
 				if (!removeId.equals(thisObjectId)) {
 					// �t�B�[���h�ithis ���� removeId �ւ̎Q�Ɓj���f���^�̍\���v�f�ɂȂ�
-					if (removeId.equals(srcObject.getId())) {
+					if (srcAliasList.get(removeId) != null) {
 						r = new Reference(thisObj, srcObject);
 						r.setCreation(creationList.contains(removeId));		// �I�u�W�F�N�g�̐�����?
 						eStructure.addSrcSide(r);
 						srcObject = thisObj;
 						isSrcSide = true;
-					} else if (removeId.equals(dstObject.getId())) {
+						aliasCollector.addAlias(srcAliasList.get(removeId));
+						aliasCollector.changeTrackingObject(removeId, thisObjectId, isSrcSide);
+						aliasCollector.addAlias(new Alias(Alias.AliasType.THIS, 0, thisObjectId, srcAliasList.get(removeId).getOccurrencePoint()));
+						srcAliasList.remove(removeId);
+					} else if (dstAliasList.get(removeId) != null) {
 						r = new Reference(thisObj, dstObject);
 						r.setCreation(creationList.contains(removeId));		// �I�u�W�F�N�g�̐�����?
 						eStructure.addDstSide(r);
 						dstObject = thisObj;
 						isSrcSide = false;
+						aliasCollector.addAlias(dstAliasList.get(removeId));
+						aliasCollector.changeTrackingObject(removeId, thisObjectId, isSrcSide);
+						aliasCollector.addAlias(new Alias(Alias.AliasType.THIS, 0, thisObjectId, dstAliasList.get(removeId).getOccurrencePoint()));
+						dstAliasList.remove(removeId);
 					}
-					aliasCollector.addAlias(aliasList.get(removeId));
-					aliasCollector.changeTrackingObject(removeId, thisObjectId, isSrcSide);
-					aliasCollector.addAlias(new Alias(Alias.AliasType.THIS, 0, thisObjectId, aliasList.get(removeId).getOccurrencePoint()));
 				}
 			}
 		}