diff --git a/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/JSONTraceGenerator.java b/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/JSONTraceGenerator.java
index 0aae591..08b967a 100644
--- a/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/JSONTraceGenerator.java
+++ b/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/JSONTraceGenerator.java
@@ -32,7 +32,7 @@
 		keys.add("lineNum");	values.add(lineNum);
 		keys.add("time");		values.add(timeStamp);
 		return "$proceed($$); " + 
-				Tracer.TRACER + "MyPrintStream.println(" + generateJSONMapGenerator(keys, values) + " + \",\");";
+				Tracer.TRACER + "OfflineTraceOutput.println(" + generateJSONMapGenerator(keys, values) + " + \",\");";
 	}
 
 	@Override
@@ -52,7 +52,7 @@
 		keys.add("lineNum");	values.add(lineNum);
 		keys.add("time");		values.add(timeStamp);
 		return "$_ = $proceed(); " + 
-				Tracer.TRACER + "MyPrintStream.println(" + generateJSONMapGenerator(keys, values) + " + \",\");";
+				Tracer.TRACER + "OfflineTraceOutput.println(" + generateJSONMapGenerator(keys, values) + " + \",\");";
 	}
 	
 
@@ -69,7 +69,7 @@
 		keys.add("lineNum");	values.add(lineNum);
 		keys.add("time");		values.add(timeStamp);
 		return "$_ = $proceed($$); " + 
-				Tracer.TRACER + "MyPrintStream.println(" + generateJSONMapGenerator(keys, values) + " + \",\");";
+				Tracer.TRACER + "OfflineTraceOutput.println(" + generateJSONMapGenerator(keys, values) + " + \",\");";
 	}
 
 	@Override
@@ -98,7 +98,7 @@
 		keys.add("args");			values.add(generateJSONArrayGenerator(argList));
 		keys.add("threadId");		values.add(threadId);
 		keys.add("time");			values.add(timeStamp);
-		return Tracer.TRACER + "MyPrintStream.println(" + generateJSONMapGenerator(keys, values) + " + \",\");";
+		return Tracer.TRACER + "OfflineTraceOutput.println(" + generateJSONMapGenerator(keys, values) + " + \",\");";
 	}
 
 	@Override
@@ -120,7 +120,7 @@
 		keys.add("returnValue");	values.add(generateJSONObjectGenerator(returnedClass, returnedObject));
 		keys.add("threadId");		values.add(threadId);
 		keys.add("time");			values.add(timeStamp);
-		return Tracer.TRACER + "MyPrintStream.println(" + generateJSONMapGenerator(keys, values) + " + \",\");";
+		return Tracer.TRACER + "OfflineTraceOutput.println(" + generateJSONMapGenerator(keys, values) + " + \",\");";
 	}
 
 	@Override
@@ -131,7 +131,7 @@
 		keys.add("callerSideSignature");	values.add(DQ_GEN + " + \"" + m.getLongName().replace('$', '.') + "\" + " + DQ_GEN);		// AspectJ�ł̓��\�b�h�V�O�j�`�����ł͖����N���X�̓h�b�g�ŋ�؂���
 		keys.add("threadId");				values.add(threadId);
 		keys.add("lineNum");				values.add(lineNum);
-		return Tracer.TRACER + "MyPrintStream.println(" + generateJSONMapGenerator(keys, values) + " + \",\");";
+		return Tracer.TRACER + "OfflineTraceOutput.println(" + generateJSONMapGenerator(keys, values) + " + \",\");";
 	}
 
 	@Override
@@ -149,7 +149,7 @@
 		keys.add("threadId");			values.add(threadId);
 		keys.add("lineNum");			values.add(lineNum);
 		keys.add("time");				values.add(timeStamp);
-		return Tracer.TRACER + "MyPrintStream.println(" + generateJSONMapGenerator(keys, values) + " + \",\");";
+		return Tracer.TRACER + "OfflineTraceOutput.println(" + generateJSONMapGenerator(keys, values) + " + \",\");";
 	}
 
 	@Override
@@ -160,7 +160,7 @@
 		keys.add("name");				values.add(DQ_GEN + " + " + className + " + " + DQ_GEN);
 		keys.add("path");				values.add(DQ_GEN + " + " + classPath + " + " + DQ_GEN);
 		keys.add("loaderPath");			values.add(DQ_GEN + " + " + loaderPath + " + " + DQ_GEN);
-		return Tracer.TRACER + "MyPrintStream.println(" + generateJSONMapGenerator(keys, values) + " + \",\");";
+		return Tracer.TRACER + "OfflineTraceOutput.println(" + generateJSONMapGenerator(keys, values) + " + \",\");";
 	}
 	
 	private String generateJSONObjectGenerator(String className, String objectId) {
@@ -201,7 +201,7 @@
 		keys.add("value");		values.add(generateJSONObjectOutput(valueType, valueId));
 		keys.add("threadId");	values.add(Long.toString(threadId));
 		keys.add("time");		values.add(Long.toString(timeStamp));
-		MyPrintStream.println(generateJSONMapOutput(keys, values) + ",");
+		OfflineTraceOutput.println(generateJSONMapOutput(keys, values) + ",");
 	}
 
 	public static void arrayGetOutput(String arrayType, String arrayId, int index, String valueType, String valueId, long threadId, long timeStamp) {
@@ -213,7 +213,7 @@
 		keys.add("value");		values.add(generateJSONObjectOutput(valueType, valueId));
 		keys.add("threadId");	values.add(Long.toString(threadId));
 		keys.add("time");		values.add(Long.toString(timeStamp));
-		MyPrintStream.println(generateJSONMapOutput(keys, values) + ",");
+		OfflineTraceOutput.println(generateJSONMapOutput(keys, values) + ",");
 	}
 	
 	private static String generateJSONObjectOutput(String className, String objectId) {
diff --git a/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/MyPrintStream.java b/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/MyPrintStream.java
deleted file mode 100644
index 10872bd..0000000
--- a/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/MyPrintStream.java
+++ /dev/null
@@ -1,84 +0,0 @@
-package org.ntlab.traceCollector.tracer;
-
-import java.io.PrintStream;
-import java.util.concurrent.ConcurrentLinkedQueue;
-
-/**
- * �g���[�X�o�͗p���[�e�B���e�B
- * 
- * @author Nitta
- *
- */
-public class MyPrintStream extends Thread {
-	private static MyPrintStream theInstance;
-	private static ConcurrentLinkedQueue<String> output;
-	private static String s = null;
-	private static PrintStream sysout = null;
-	
-	private static MyPrintStream getInstance() {
-		if (theInstance == null) {
-			theInstance = new MyPrintStream();
-			output = new ConcurrentLinkedQueue<String>();
-			sysout = System.out;
-			Runtime.getRuntime().addShutdownHook(theInstance);		// �V���b�g�_�E���p
-		}
-		return theInstance;
-	}
-	
-	public static void print(int n) {
-		getInstance()._print(n);
-	}
-
-	public static void print(String s) {
-		getInstance()._print(s);
-	}		
-	
-	public static void println() {
-		getInstance()._println();
-	}
-
-	public static void println(String s) {
-		getInstance()._println(s);
-	}
-
-	public void run() {
-		// �V���b�g�_�E����A�g���[�X���o�͂���
-		for (String s: output) {
-			sysout.println(s);
-		}			
-	}
-	
-	private synchronized void _print(int n) {
-		if (s == null) {
-			s = Integer.toString(n);
-		} else {
-			s += n;
-		}
-	}
-
-	private synchronized void _print(String s1) {
-		if (s == null) {
-			s = s1;
-		} else {
-			s += s1;
-		}
-	}		
-	
-	private synchronized void _println() {
-		if (s == null) {
-			s = "";
-		}
-		output.add(s);
-		s = null;
-	}
-
-	private synchronized void _println(String s1) {
-		if (s == null) {
-			s = s1;
-		} else {
-			s += s1;
-		}
-		output.add(s);
-		s = null;
-	}
-}
diff --git a/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/OfflineTraceOutput.java b/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/OfflineTraceOutput.java
new file mode 100644
index 0000000..d25e2a0
--- /dev/null
+++ b/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/OfflineTraceOutput.java
@@ -0,0 +1,84 @@
+package org.ntlab.traceCollector.tracer;
+
+import java.io.PrintStream;
+import java.util.concurrent.ConcurrentLinkedQueue;
+
+/**
+ * �g���[�X�o�͗p���[�e�B���e�B
+ * 
+ * @author Nitta
+ *
+ */
+public class OfflineTraceOutput extends Thread {
+	private static OfflineTraceOutput theInstance;
+	private static ConcurrentLinkedQueue<String> output;
+	private static String s = null;
+	private static PrintStream sysout = null;
+	
+	private static OfflineTraceOutput getInstance() {
+		if (theInstance == null) {
+			theInstance = new OfflineTraceOutput();
+			output = new ConcurrentLinkedQueue<String>();
+			sysout = System.out;
+			Runtime.getRuntime().addShutdownHook(theInstance);		// �V���b�g�_�E���p
+		}
+		return theInstance;
+	}
+	
+	public static void print(int n) {
+		getInstance()._print(n);
+	}
+
+	public static void print(String s) {
+		getInstance()._print(s);
+	}		
+	
+	public static void println() {
+		getInstance()._println();
+	}
+
+	public static void println(String s) {
+		getInstance()._println(s);
+	}
+
+	public void run() {
+		// �V���b�g�_�E����A�g���[�X���o�͂���
+		for (String s: output) {
+			sysout.println(s);
+		}			
+	}
+	
+	private synchronized void _print(int n) {
+		if (s == null) {
+			s = Integer.toString(n);
+		} else {
+			s += n;
+		}
+	}
+
+	private synchronized void _print(String s1) {
+		if (s == null) {
+			s = s1;
+		} else {
+			s += s1;
+		}
+	}		
+	
+	private synchronized void _println() {
+		if (s == null) {
+			s = "";
+		}
+		output.add(s);
+		s = null;
+	}
+
+	private synchronized void _println(String s1) {
+		if (s == null) {
+			s = s1;
+		} else {
+			s += s1;
+		}
+		output.add(s);
+		s = null;
+	}
+}
diff --git a/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/PlainTextTraceGenerator.java b/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/PlainTextTraceGenerator.java
index 6d13f65..e9c2400 100644
--- a/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/PlainTextTraceGenerator.java
+++ b/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/PlainTextTraceGenerator.java
@@ -21,7 +21,7 @@
 			String fieldName, String containerClass, String containerObject, 
 			String valueClass, String valueObject, String threadId, String lineNum, String timeStamp) {
 		return "$proceed($$); " + 
-					Tracer.TRACER + "MyPrintStream.println(\"set:\" + " + containerClass + " + \":\" + " + containerObject + " + \":\" + " + 
+					Tracer.TRACER + "OfflineTraceOutput.println(\"set:\" + " + containerClass + " + \":\" + " + containerObject + " + \":\" + " + 
 													valueClass + " + \":\" + " + valueObject + " + " + LINE_AND_THREAD + threadId + ");";
 	}
 
@@ -30,7 +30,7 @@
 			String fieldName, String thisClass, String thisObject, String containerClass, String containerObject, 
 			String valueClass, String valueObject, String threadId, String lineNum, String timeStamp) {
 		return "$_ = $proceed(); " + 
-					Tracer.TRACER + "MyPrintStream.println(\"get:\" + " + thisClass + " + \":\" + " + thisObject + " + \":\" + " + 
+					Tracer.TRACER + "OfflineTraceOutput.println(\"get:\" + " + thisClass + " + \":\" + " + thisObject + " + \":\" + " + 
 													containerClass + " + \":\" + " + containerObject + " + \":\" + " + 
 													valueClass + " + \":\" + " + valueObject + " + " + LINE_AND_THREAD + threadId + ");";
 	}
@@ -52,7 +52,7 @@
 		String classOutput = "";
 		String argsOutput = "";
 		// �����̏o��
-		String delimiter = Tracer.TRACER + "MyPrintStream.println(\"Args:\" + ";
+		String delimiter = Tracer.TRACER + "OfflineTraceOutput.println(\"Args:\" + ";
 		for (int p = 0; p < argClasses.size(); p++) {
 			argsOutput += delimiter + argClasses.get(p) + " + \":\" + " + argObjects.get(p);
 			delimiter = " + \":\" + ";
@@ -62,11 +62,11 @@
 		}
 		if (m instanceof CtConstructor) {
 			// �R���X�g���N�^�̏ꍇ
-			newOutput = Tracer.TRACER + "MyPrintStream.println(\"New \" + " + thisClass + " + \":\" + " + thisObject + " + " + LINE_AND_THREAD + threadId + ");";
+			newOutput = Tracer.TRACER + "OfflineTraceOutput.println(\"New \" + " + thisClass + " + \":\" + " + thisObject + " + " + LINE_AND_THREAD + threadId + ");";
 		}
-		methodOutput = Tracer.TRACER + "MyPrintStream.println(\"Method \" + " + thisClass + " + \",\" + " + methodSignature
+		methodOutput = Tracer.TRACER + "OfflineTraceOutput.println(\"Method \" + " + thisClass + " + \",\" + " + methodSignature
 				+ " + \":\" + " + thisObject + " + " + LINE + " + " + timeStamp + " + \":ThreadNo \" + " + threadId + ");";
-		classOutput = Tracer.TRACER + "MyPrintStream.println(\"Class \" + " + thisClass + " + \":\" + " + thisObject + " + " + LINE_AND_THREAD + threadId + ");";
+		classOutput = Tracer.TRACER + "OfflineTraceOutput.println(\"Class \" + " + thisClass + " + \":\" + " + thisObject + " + " + LINE_AND_THREAD + threadId + ");";
 		
 		return newOutput + methodOutput + classOutput + argsOutput;
 	}	
@@ -94,8 +94,8 @@
 			}
 		}
 		
-		String returnOutput =  Tracer.TRACER + "MyPrintStream.print(\"Return " + invocationType + "(" + shortName + "):\" + " + returnedClass + " + \":\" + " + returnedObject + " + \":\");" + 
-				Tracer.TRACER + "MyPrintStream.println(\"\" + " + thisObject + " + " + LINE_AND_THREAD + threadId + ");";
+		String returnOutput =  Tracer.TRACER + "OfflineTraceOutput.print(\"Return " + invocationType + "(" + shortName + "):\" + " + returnedClass + " + \":\" + " + returnedObject + " + \":\");" + 
+				Tracer.TRACER + "OfflineTraceOutput.println(\"\" + " + thisObject + " + " + LINE_AND_THREAD + threadId + ");";
 
 		return returnOutput;
 	}