diff --git a/org.ntlab.traceCollector/src/org/ntlab/traceCollector/TracerLaunchConfigurationDelegate.java b/org.ntlab.traceCollector/src/org/ntlab/traceCollector/TracerLaunchConfigurationDelegate.java
index 8ac9832..0e68cba 100644
--- a/org.ntlab.traceCollector/src/org/ntlab/traceCollector/TracerLaunchConfigurationDelegate.java
+++ b/org.ntlab.traceCollector/src/org/ntlab/traceCollector/TracerLaunchConfigurationDelegate.java
@@ -88,7 +88,6 @@
 
 				for (int i = 0; i < classpath.length; i++) {
 					classpath[i] = classpath[i].replace("/", File.separator);
-					System.out.println(String.format("classpath[%d] = %s", i, classpath[i]));
 				}
 			} catch (IOException e) {
 				classpath = configClasspath;
diff --git a/org.ntlab.traceCollector/src/org/ntlab/traceCollector/handlers/InstrumentationHandlerForOfflineAnalysis.java b/org.ntlab.traceCollector/src/org/ntlab/traceCollector/handlers/InstrumentationHandlerForOfflineAnalysis.java
index 49111e8..111911f 100644
--- a/org.ntlab.traceCollector/src/org/ntlab/traceCollector/handlers/InstrumentationHandlerForOfflineAnalysis.java
+++ b/org.ntlab.traceCollector/src/org/ntlab/traceCollector/handlers/InstrumentationHandlerForOfflineAnalysis.java
@@ -9,7 +9,6 @@
 
  	@Override
 	public Object execute(ExecutionEvent event) throws ExecutionException {
-		System.out.println("InstrumentationHandlerForOfflineAnalysis#execute(ExecutionEvent)");
 		return super.execute(event);
 	}
 	
diff --git a/org.ntlab.traceCollector/src/org/ntlab/traceCollector/handlers/InstrumentationHandlerForOnlineAnalysis.java b/org.ntlab.traceCollector/src/org/ntlab/traceCollector/handlers/InstrumentationHandlerForOnlineAnalysis.java
index dda9e5c..813a09a 100644
--- a/org.ntlab.traceCollector/src/org/ntlab/traceCollector/handlers/InstrumentationHandlerForOnlineAnalysis.java
+++ b/org.ntlab.traceCollector/src/org/ntlab/traceCollector/handlers/InstrumentationHandlerForOnlineAnalysis.java
@@ -9,7 +9,6 @@
 
 	@Override
 	public Object execute(ExecutionEvent event) throws ExecutionException {
-		System.out.println("InstrumentationHandlerForOnlineAnalysis#execute(ExecutionEvent)");
 		return super.execute(event);
 	}
 	
diff --git a/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/JSONArrayAdvisor.java b/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/JSONArrayAdvisor.java
index ba391f2..89847db 100644
--- a/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/JSONArrayAdvisor.java
+++ b/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/JSONArrayAdvisor.java
@@ -1,7 +1,5 @@
 package org.ntlab.traceCollector.tracer;
 
-import java.util.ArrayList;
-
 /**
  * �z��ւ̃A�N�Z�X�����o�͂��邽�߂̃N���X
  * @author �V�c����
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 08b967a..accb976 100644
--- a/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/JSONTraceGenerator.java
+++ b/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/JSONTraceGenerator.java
@@ -2,7 +2,6 @@
 
 import java.util.ArrayList;
 import java.util.List;
-import java.util.Map.Entry;
 
 import javassist.CtBehavior;
 import javassist.CtClass;
diff --git a/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/OnlineArrayAdvisor.java b/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/OnlineArrayAdvisor.java
index f929c6a..302c2c8 100644
--- a/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/OnlineArrayAdvisor.java
+++ b/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/OnlineArrayAdvisor.java
@@ -1,7 +1,5 @@
 package org.ntlab.traceCollector.tracer;
 
-import java.util.ArrayList;
-
 /**
  * �z��ւ̃A�N�Z�X�����o�͂��邽�߂̃N���X (�I�����C����͗p)
  * @author �ΒJ��
diff --git a/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/OnlineTraceGenerator.java b/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/OnlineTraceGenerator.java
index 510162c..bfd3a90 100644
--- a/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/OnlineTraceGenerator.java
+++ b/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/OnlineTraceGenerator.java
@@ -1,10 +1,7 @@
 package org.ntlab.traceCollector.tracer;
 
-import java.util.ArrayList;
 import java.util.List;
 
-import org.ntlab.traceCollector.tracer.trace.TraceJSON;
-
 import javassist.CtBehavior;
 import javassist.CtClass;
 import javassist.CtConstructor;
diff --git a/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/trace/ThreadInstance.java b/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/trace/ThreadInstance.java
index 341c0b9..ac479bc 100644
--- a/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/trace/ThreadInstance.java
+++ b/org.ntlab.traceCollector/src/org/ntlab/traceCollector/tracer/trace/ThreadInstance.java
@@ -1,7 +1,6 @@
 package org.ntlab.traceCollector.tracer.trace;
 
 import java.util.ArrayList;
-import java.util.Collection;
 import java.util.HashMap;
 import java.util.HashSet;
 
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 8a1c4e7..5a00c2c 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
@@ -4,13 +4,9 @@
 import java.io.FileReader;
 import java.io.IOException;
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Iterator;
-import java.util.LinkedHashMap;
-import java.util.List;
-import java.util.Map;
 import java.util.Stack;
 
 public class TraceJSON extends Trace {
diff --git a/org.ntlab.traceCollector/src/org/ntlab/traceCollector/ui/TracerLocalJavaApplicationTabGroup.java b/org.ntlab.traceCollector/src/org/ntlab/traceCollector/ui/TracerLocalJavaApplicationTabGroup.java
index 22145f2..a9f6adc 100644
--- a/org.ntlab.traceCollector/src/org/ntlab/traceCollector/ui/TracerLocalJavaApplicationTabGroup.java
+++ b/org.ntlab.traceCollector/src/org/ntlab/traceCollector/ui/TracerLocalJavaApplicationTabGroup.java
@@ -4,7 +4,6 @@
 import org.eclipse.debug.ui.EnvironmentTab;
 import org.eclipse.debug.ui.ILaunchConfigurationDialog;
 import org.eclipse.debug.ui.ILaunchConfigurationTab;
-import org.eclipse.debug.ui.sourcelookup.SourceLookupTab;
 import org.eclipse.jdt.debug.ui.launchConfigurations.JavaArgumentsTab;
 import org.eclipse.jdt.debug.ui.launchConfigurations.JavaClasspathTab;
 import org.eclipse.jdt.debug.ui.launchConfigurations.JavaJRETab;
diff --git a/org.ntlab.traceCollector/src/org/ntlab/traceCollector/ui/TracerTab.java b/org.ntlab.traceCollector/src/org/ntlab/traceCollector/ui/TracerTab.java
index 368875c..9e5b606 100644
--- a/org.ntlab.traceCollector/src/org/ntlab/traceCollector/ui/TracerTab.java
+++ b/org.ntlab.traceCollector/src/org/ntlab/traceCollector/ui/TracerTab.java
@@ -7,7 +7,6 @@
 import org.eclipse.swt.layout.GridLayout;
 import org.eclipse.swt.widgets.Composite;
 
-
 public class TracerTab extends org.eclipse.debug.ui.AbstractLaunchConfigurationTab {
 
 	private static final String TAB_NAME = "Tracer Settings";