diff --git a/src/org/ntlab/deltaExtractor/DeltaExtractor.java b/src/org/ntlab/deltaExtractor/DeltaExtractor.java
index e5a295e..23fc536 100644
--- a/src/org/ntlab/deltaExtractor/DeltaExtractor.java
+++ b/src/org/ntlab/deltaExtractor/DeltaExtractor.java
@@ -38,7 +38,7 @@
 	protected static final boolean DEBUG2 = true;
 	protected final IAliasCollector defaultAliasCollector = new IAliasCollector() {
 		@Override
-		public void changeTrackingObject(String from, String to) {
+		public void changeTrackingObject(String from, String to, boolean isSrcSide) {
 		}
 		@Override
 		public void addAlias(Alias alias) {
diff --git a/src/org/ntlab/deltaExtractor/DeltaExtractorJSON.java b/src/org/ntlab/deltaExtractor/DeltaExtractorJSON.java
index 227537a..16be00d 100644
--- a/src/org/ntlab/deltaExtractor/DeltaExtractorJSON.java
+++ b/src/org/ntlab/deltaExtractor/DeltaExtractorJSON.java
@@ -126,18 +126,21 @@
 						aliasList.put(refObjectId, new Alias(Alias.AliasType.FIELD, 0, refObjectId, tracePoint.duplicate()));
 					} else {
 						// ���ڎQ�Ƃ̏ꍇ
+						boolean isSrcSideChanged = false;
 						if (refObjectId.equals(srcObject.getId())) {
 							eStructure.addSrcSide(new Reference(ownerObjectId, refObjectId,
 									fs.getContainerClassName(), srcObject.getActualType()));
 							srcObject = new ObjectReference(ownerObjectId, fs.getContainerClassName());
+							isSrcSideChanged = true;
 						} else if(refObjectId.equals(dstObject.getId())) {
 							eStructure.addDstSide(new Reference(ownerObjectId, refObjectId,
 									fs.getContainerClassName(), dstObject.getActualType()));
 							dstObject = new ObjectReference(ownerObjectId, fs.getContainerClassName());
+							isSrcSideChanged = false;
 						}
 						objList.set(index, ownerObjectId);
 						aliasCollector.addAlias(new Alias(Alias.AliasType.FIELD, 0, refObjectId, tracePoint.duplicate()));
-						aliasCollector.changeTrackingObject(refObjectId, ownerObjectId); //�ǐՑΏۃI�u�W�F�N�g�̐؂�ւ�
+						aliasCollector.changeTrackingObject(refObjectId, ownerObjectId, isSrcSideChanged); //�ǐՑΏۃI�u�W�F�N�g�̐؂�ւ�
 						aliasCollector.addAlias(new Alias(Alias.AliasType.CONTAINER, 0, ownerObjectId, tracePoint.duplicate()));
 					}
 				}
@@ -147,19 +150,22 @@
 				int index = objList.indexOf(elementObjectId);
 				if (index != -1) {
 					// �z��A�N�Z�X�̏ꍇ
+					boolean isSrcSideChanged = false;
 					String arrayObjectId = aa.getArrayObjectId();
 					if (elementObjectId.equals(srcObject.getId())) {
 						eStructure.addSrcSide(new Reference(arrayObjectId, elementObjectId,
 								aa.getArrayClassName(), srcObject.getActualType()));
 						srcObject = new ObjectReference(arrayObjectId, aa.getArrayClassName());
+						isSrcSideChanged = true;
 					} else if(elementObjectId.equals(dstObject.getId())) {
 						eStructure.addDstSide(new Reference(arrayObjectId, elementObjectId,
 								aa.getArrayClassName(), dstObject.getActualType()));
 						dstObject = new ObjectReference(arrayObjectId, aa.getArrayClassName());
+						isSrcSideChanged = false;
 					}
 					objList.set(index, arrayObjectId);
 					aliasCollector.addAlias(new Alias(Alias.AliasType.ARRAY_ELEMENT, aa.getIndex(), elementObjectId, tracePoint.duplicate()));
-					aliasCollector.changeTrackingObject(elementObjectId, arrayObjectId); //�ǐՑΏۃI�u�W�F�N�g�̐؂�ւ�
+					aliasCollector.changeTrackingObject(elementObjectId, arrayObjectId, isSrcSideChanged); //�ǐՑΏۃI�u�W�F�N�g�̐؂�ւ�
 					aliasCollector.addAlias(new Alias(Alias.AliasType.ARRAY, 0, arrayObjectId, tracePoint.duplicate()));
 				}
 			} else if (statement instanceof ArrayCreate) {
@@ -264,7 +270,7 @@
 						isSrcSide = false;
 					}
 					aliasCollector.addAlias(aliasList.get(removeId));
-					aliasCollector.changeTrackingObject(removeId, thisObjectId);
+					aliasCollector.changeTrackingObject(removeId, thisObjectId, isSrcSide);
 					aliasCollector.addAlias(new Alias(Alias.AliasType.THIS, 0, thisObjectId, aliasList.get(removeId).getOccurrencePoint()));
 				}
 			}
@@ -418,36 +424,42 @@
 						String ownerObjectId = fs.getContainerObjId();
 						if (ownerObjectId.equals(thisObjectId)) {							
 							// �t�B�[���h�Q�Ƃ̏ꍇ
+							boolean isSrcSideChanged = false;
 							if (objectId.equals(srcObject.getId())) {
 								eStructure.addSrcSide(new Reference(thisObj, srcObject));
 								srcObject = thisObj;
 								trackingObj = srcObject;
+								isSrcSideChanged = true;
 							} else if(objectId.equals(dstObject.getId())) {
 								eStructure.addDstSide(new Reference(thisObj, dstObject));
 								dstObject = thisObj;
 								trackingObj = dstObject;
+								isSrcSideChanged = false;
 							}
 							aliasCollector.addAlias(new Alias(Alias.AliasType.FIELD, 0, objectId, tracePoint.duplicate()));
-							aliasCollector.changeTrackingObject(objectId, ownerObjectId);
+							aliasCollector.changeTrackingObject(objectId, ownerObjectId, isSrcSideChanged);
 							aliasCollector.addAlias(new Alias(Alias.AliasType.THIS, 0, ownerObjectId, tracePoint.duplicate()));
 							if (Trace.isNull(thisObjectId)) objectId = null;	// static�ϐ��̏ꍇ
 							else objectId = thisObjectId;
 							objList.set(index, objectId);
 						} else {
 							// ���ڎQ�Ƃ̏ꍇ
+							boolean isSrcSideChanged = false;
 							if (objectId.equals(srcObject.getId())) {
 								eStructure.addSrcSide(new Reference(ownerObjectId, objectId,
 										fs.getContainerClassName(), srcObject.getActualType()));
 								srcObject = new ObjectReference(ownerObjectId, fs.getContainerClassName());
 								trackingObj = srcObject;
+								isSrcSideChanged = true;
 							} else if(objectId.equals(dstObject.getId())) {
 								eStructure.addDstSide(new Reference(ownerObjectId, objectId,
 										fs.getContainerClassName(), dstObject.getActualType()));
 								dstObject = new ObjectReference(ownerObjectId, fs.getContainerClassName());
 								trackingObj = dstObject;
+								isSrcSideChanged = false;
 							}
 							aliasCollector.addAlias(new Alias(Alias.AliasType.FIELD, 0, objectId, tracePoint.duplicate()));
-							aliasCollector.changeTrackingObject(objectId, ownerObjectId);
+							aliasCollector.changeTrackingObject(objectId, ownerObjectId, isSrcSideChanged);
 							aliasCollector.addAlias(new Alias(Alias.AliasType.CONTAINER, 0, ownerObjectId, tracePoint.duplicate()));
 							if (Trace.isNull(ownerObjectId)) objectId = null;	// static�ϐ��̏ꍇ
 							else objectId = ownerObjectId;
@@ -459,20 +471,23 @@
 					ArrayAccess aa = (ArrayAccess)statement;
 					if (objectId != null && objectId.equals(aa.getValueObjectId())) {
 						// �z��A�N�Z�X�̏ꍇ
+						boolean isSrcSideChanged = false;
 						String arrayObjectId = aa.getArrayObjectId();
 						if (objectId.equals(srcObject.getId())) {
 							eStructure.addSrcSide(new Reference(arrayObjectId, objectId,
 									aa.getArrayClassName(), srcObject.getActualType()));
 							srcObject = new ObjectReference(arrayObjectId, aa.getArrayClassName());
 							trackingObj = srcObject;
+							isSrcSideChanged = true;
 						} else if(objectId.equals(dstObject.getId())) {
 							eStructure.addDstSide(new Reference(arrayObjectId, objectId,
 									aa.getArrayClassName(), dstObject.getActualType()));
 							dstObject = new ObjectReference(arrayObjectId, aa.getArrayClassName());
 							trackingObj = dstObject;
+							isSrcSideChanged = false;
 						}
 						aliasCollector.addAlias(new Alias(Alias.AliasType.ARRAY_ELEMENT, aa.getIndex(), objectId, tracePoint.duplicate()));
-						aliasCollector.changeTrackingObject(objectId, arrayObjectId);
+						aliasCollector.changeTrackingObject(objectId, arrayObjectId, isSrcSideChanged);
 						aliasCollector.addAlias(new Alias(Alias.AliasType.ARRAY, 0, arrayObjectId, tracePoint.duplicate()));
 						objectId = arrayObjectId;
 						objList.set(index, objectId);
@@ -482,17 +497,20 @@
 					ArrayCreate ac = (ArrayCreate)statement;
 					if (objectId != null && objectId.equals(ac.getArrayObjectId())) {
 						// �z�񐶐��̏ꍇ
+						boolean isSrcSideChanged = false;
 						if (objectId.equals(srcObject.getId())) {
 							eStructure.addSrcSide(new Reference(thisObj, srcObject));
 							srcObject = thisObj;
 							trackingObj = srcObject;
+							isSrcSideChanged = true;
 						} else if(objectId.equals(dstObject.getId())) {
 							eStructure.addDstSide(new Reference(thisObj, dstObject));
 							dstObject = thisObj;
 							trackingObj = dstObject;
+							isSrcSideChanged = false;
 						}
 						aliasCollector.addAlias(new Alias(Alias.AliasType.ARRAY_CREATE, 0, ac.getArrayObjectId(), tracePoint.duplicate()));
-						aliasCollector.changeTrackingObject(ac.getArrayObjectId(), thisObjectId);
+						aliasCollector.changeTrackingObject(ac.getArrayObjectId(), thisObjectId, isSrcSideChanged);
 						aliasCollector.addAlias(new Alias(Alias.AliasType.THIS, 0, thisObjectId, tracePoint.duplicate()));
 						if (Trace.isNull(thisObjectId)) objectId = null;	// static�ϐ��̏ꍇ
 						else objectId = thisObjectId;
@@ -521,7 +539,7 @@
 								eStructure.addSrcSide(r);
 								srcObject = thisObj;
 								trackingObj = srcObject;
-								aliasCollector.changeTrackingObject(objectId, thisObjectId);
+								aliasCollector.changeTrackingObject(objectId, thisObjectId, true);
 								aliasCollector.addAlias(new Alias(Alias.AliasType.THIS, 0, thisObjectId, tracePoint.duplicate()));
 							} else if (objectId.equals(dstObject.getId())) {
 								r = new Reference(thisObj, dstObject);
@@ -529,7 +547,7 @@
 								eStructure.addDstSide(r);
 								dstObject = thisObj;
 								trackingObj = dstObject;
-								aliasCollector.changeTrackingObject(objectId, thisObjectId);
+								aliasCollector.changeTrackingObject(objectId, thisObjectId, false);
 								aliasCollector.addAlias(new Alias(Alias.AliasType.THIS, 0, thisObjectId, tracePoint.duplicate()));
 							}
 							if (Trace.isNull(thisObjectId)) objectId = null;	// static�ϐ��̏ꍇ
@@ -580,14 +598,14 @@
 					r.setCollection(true);
 					eStructure.addSrcSide(r);
 					srcObject = thisObj;
-					aliasCollector.changeTrackingObject(objectId, thisObjectId);
+					aliasCollector.changeTrackingObject(objectId, thisObjectId, true);
 					aliasCollector.addAlias(new Alias(Alias.AliasType.THIS, 0, thisObjectId, tracePoint.duplicate()));
 				} else if(objectId.equals(dstObject.getId())) {
 					r = new Reference(thisObj, dstObject);
 					r.setCollection(true);
 					eStructure.addDstSide(r);
 					dstObject =thisObj;
-					aliasCollector.changeTrackingObject(objectId, thisObjectId);
+					aliasCollector.changeTrackingObject(objectId, thisObjectId, false);
 					aliasCollector.addAlias(new Alias(Alias.AliasType.THIS, 0, thisObjectId, tracePoint.duplicate()));
 				}
 			}
diff --git a/src/org/ntlab/deltaExtractor/IAliasCollector.java b/src/org/ntlab/deltaExtractor/IAliasCollector.java
index d3b807f..0794023 100644
--- a/src/org/ntlab/deltaExtractor/IAliasCollector.java
+++ b/src/org/ntlab/deltaExtractor/IAliasCollector.java
@@ -4,6 +4,6 @@
 	
 	void addAlias(Alias alias);
 	
-	void changeTrackingObject(String from, String to);
+	void changeTrackingObject(String from, String to, boolean isSrcSide);
 	
 }
\ No newline at end of file
diff --git a/src/org/ntlab/deltaViewer/DeltaAliasCollector.java b/src/org/ntlab/deltaViewer/DeltaAliasCollector.java
index 2d37b6f..a7f6083 100644
--- a/src/org/ntlab/deltaViewer/DeltaAliasCollector.java
+++ b/src/org/ntlab/deltaViewer/DeltaAliasCollector.java
@@ -72,7 +72,7 @@
 	}
 
 	@Override
-	public void changeTrackingObject(String fromObjId, String toObjId) {
+	public void changeTrackingObject(String fromObjId, String toObjId, boolean isSrcSide) {
 		System.out.println(fromObjId + " -> " + toObjId);
 	}