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 568a561..b1e6e11 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
@@ -52,11 +52,6 @@
 	@Override
 	public String toString() {
 		StringBuilder str = new StringBuilder();
-		String indent = "  ";
-		str.append("objId: " + objectId + "\n");
-		str.append("tp: " + occurrencePoint + "\n");
-		str.append(indent + "signature: " + occurrencePoint.getMethodExecution().getCallerSideSignature() + "\n");
-//		str.append(indent + "signature: " + occurrencePoint.getMethodExecution().getSignature() + "\n");
 		Statement statement = occurrencePoint.getStatement();
 		String statementType = "";
 		if (statement instanceof FieldAccess) {
@@ -70,13 +65,18 @@
 		} else if (statement instanceof ArrayCreate) {
 			statementType = "ArrayCreate";
 		} else if (statement instanceof MethodInvocation) {
-			statementType = "MethodInvocation";
+			MethodExecution me = ((MethodInvocation)statement).getCalledMethodExecution();
+			statementType = "MethodInvocation -> " + me.getCallerSideSignature();
 			if(((MethodInvocation)statement).getCalledMethodExecution().isConstructor()) {
 				statementType += " (Constructor)";
 			}
 		}
-		str.append(indent + "statementType: " + statementType + "\n");
+		String indent = "  ";
+		str.append("objId: " + objectId + "\n");
+		str.append("tp: " + occurrencePoint + "\n");
+		str.append(indent + "signature: " + occurrencePoint.getMethodExecution().getCallerSideSignature() + "\n");
 		str.append(indent + "lineNo: " + statement.getLineNo() + "\n");
+		str.append(indent + "statementType: " + statementType + "\n");
 		str.append("occurrenceExp: " + occurrenceExp + "\n");
 		return str.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 103d1d7..f18e71d 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
@@ -13,6 +13,9 @@
 
 import org.ntlab.traceCollector.tracer.OnlineTraceOutput;
 
+//import com.sun.jdi.ObjectReference;
+//import com.sun.jdi.Value;
+
 public class TraceJSON extends Trace {
 //	private static TraceJSON theTrace = null;
 	private HashMap<String, ClassInfo> classes = new HashMap<>();
@@ -994,6 +997,35 @@
 		return null;
 	}
 	
+	public static String findValueObjId(Statement statement, int occurrenceEXP) {
+		String valueObjId = "";
+		if (statement instanceof FieldAccess) {
+			valueObjId = ((FieldAccess) statement).getValueObjId();
+		} else if (statement instanceof FieldUpdate) {
+			valueObjId = ((FieldUpdate)statement).getValueObjId();
+		} else if (statement instanceof ArrayAccess) {
+			valueObjId = ((ArrayAccess)statement).getValueObjectId();
+		} else if (statement instanceof ArrayUpdate) {
+			valueObjId = ((ArrayUpdate)statement).getValueObjectId();
+		} else if (statement instanceof ArrayCreate) {
+			valueObjId = ((ArrayCreate)statement).getArrayObjectId();
+		} else if (statement instanceof MethodInvocation) {
+			MethodExecution me = ((MethodInvocation)statement).getCalledMethodExecution();
+			if (occurrenceEXP == Alias.OCCURRENCE_EXP_RETURN) {
+				valueObjId = me.getReturnValue().getId();	
+			} else if (occurrenceEXP == Alias.OCCURRENCE_EXP_RECEIVER) {
+				valueObjId = me.getThisObjId();
+			} else {
+				ArrayList<ObjectReference> args = me.getArguments();
+				int index = occurrenceEXP - Alias.OCCURRENCE_EXP_FIRST_ARG;
+				if (index >= 0 && index < args.size()) {
+					valueObjId = args.get(index).getId();
+				}
+			}
+		}
+		return valueObjId;
+	}
+
 	public static Alias getAlias(String objectId, TracePoint occurrencePoint, int occurrenceExp) {
 		return new Alias(objectId, occurrencePoint, occurrenceExp);
 	}
@@ -1073,7 +1105,7 @@
 		MethodExecution calledMethodExecution = ((MethodInvocation)tp.getStatement()).getCalledMethodExecution();
 		ArrayList<ObjectReference> args = calledMethodExecution.getArguments();
 		for (int i = 0; i < args.size(); i++) {
-			if (args.get(i).equals(objId)) {
+			if (args.get(i).getId().equals(objId)) {
 				// ���\�b�h�Ăяo���̎������ɃG�C���A�X�̃I�u�W�F�N�gID����v�����ꍇ
 				aliasList.add(new Alias(objId, tp.duplicate(), (i + Alias.OCCURRENCE_EXP_FIRST_ARG)));
 				if (side == 0) {
@@ -1081,7 +1113,7 @@
 					TracePoint previousTp = tp.duplicate();
 					previousTp.stepBackOver();
 					aliasLists = getObjectFlow(aliasLists, objId, previousTp, 0); // �Ăяo�����̃��\�b�h���s�ɖ߂�
-				}				
+				}
 			}
 		}
 		return aliasLists;