diff --git a/org.ntlab.traceAnalyzer/src/org/ntlab/deltaExtractor/DeltaExtractorJSON.java b/org.ntlab.traceAnalyzer/src/org/ntlab/deltaExtractor/DeltaExtractorJSON.java
index 16be00d..4b1b293 100644
--- a/org.ntlab.traceAnalyzer/src/org/ntlab/deltaExtractor/DeltaExtractorJSON.java
+++ b/org.ntlab.traceAnalyzer/src/org/ntlab/deltaExtractor/DeltaExtractorJSON.java
@@ -592,24 +592,50 @@
 		Reference r;
 		if (methodExecution.isCollectionType()) {
 			if (objectId != null) {
-				// �R���N�V�����^�̏ꍇ�A�����ŌX�̗v�f�𒼐ڕێ����Ă���Ɖ��肷��
-				if (objectId.equals(srcObject.getId())) {
-					r = new Reference(thisObj, srcObject);
-					r.setCollection(true);
-					eStructure.addSrcSide(r);
-					srcObject = thisObj;
-					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, false);
-					aliasCollector.addAlias(new Alias(Alias.AliasType.THIS, 0, thisObjectId, tracePoint.duplicate()));
+				if (methodExecution.getSignature().contains("Collections.unmodifiable") 
+						|| methodExecution.getSignature().startsWith("Collections.checked") 
+						|| methodExecution.getSignature().startsWith("Collections.synchronized") 
+						|| methodExecution.getSignature().startsWith("Arrays.asList") 
+						|| methodExecution.getSignature().startsWith("Arrays.copyOf")) {
+					// �z���R���N�V�����̊Ԃ̕ϊ��̏ꍇ�A�ϊ����̑������Ɉˑ�����
+					if (arguments.size() > 0) {
+						if (objectId.equals(srcObject.getId())) {
+							r = new Reference(arguments.get(0), srcObject);
+							r.setCollection(true);
+							eStructure.addSrcSide(r);
+							srcObject = arguments.get(0);
+							aliasCollector.changeTrackingObject(objectId, arguments.get(0).getId(), true);
+							aliasCollector.addAlias(new Alias(Alias.AliasType.FORMAL_PARAMETER, 0, arguments.get(0).getId(), tracePoint.duplicate()));
+						} else if(objectId.equals(dstObject.getId())) {
+							r = new Reference(arguments.get(0), dstObject);
+							r.setCollection(true);
+							eStructure.addDstSide(r);
+							dstObject =arguments.get(0);
+							aliasCollector.changeTrackingObject(objectId, arguments.get(0).getId(), false);
+							aliasCollector.addAlias(new Alias(Alias.AliasType.FORMAL_PARAMETER, 0, arguments.get(0).getId(), tracePoint.duplicate()));
+						}
+					}
+					objList.set(index, arguments.get(0).getId());
+				} else {
+					// �R���N�V�����^�̏ꍇ�A�����ŌX�̗v�f�𒼐ڕێ����Ă���Ɖ��肷��
+					if (objectId.equals(srcObject.getId())) {
+						r = new Reference(thisObj, srcObject);
+						r.setCollection(true);
+						eStructure.addSrcSide(r);
+						srcObject = thisObj;
+						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, false);
+						aliasCollector.addAlias(new Alias(Alias.AliasType.THIS, 0, thisObjectId, tracePoint.duplicate()));
+					}
+					objList.set(index, methodExecution.getThisObjId());
 				}
 			}
-			objList.set(index, methodExecution.getThisObjId());
 			isResolved = true;		// �K�v�Ȃ̂ł�?
 		}