diff --git a/src/main/java/cactusServer/entities/Character.java b/src/main/java/cactusServer/entities/Character.java
index 380c7a3..7a6bdc4 100644
--- a/src/main/java/cactusServer/entities/Character.java
+++ b/src/main/java/cactusServer/entities/Character.java
@@ -155,10 +155,10 @@
 	}
 
 	private void updateAreaURI() {
-		String[] areaURISplit = areaURI.split("/"); // �c�c/instances/{instanceId}/areas/{areaId}
-		int splitSize = areaURISplit.length;
-		String instanceId = areaURISplit[splitSize - 3];
-		String previousAreaId = areaURISplit[splitSize - 1];
+		String[] splitedAreaURI = areaURI.split("/"); // �c�c/instances/{instanceId}/areas/{areaId}
+		int splitSize = splitedAreaURI.length;
+		String instanceId = splitedAreaURI[splitSize - 3];
+		String previousAreaId = splitedAreaURI[splitSize - 1];
 		Instance instance = Instances.getInstance().getInstance(instanceId);
 		Area previousArea = instance.getArea(previousAreaId);
 		if (!previousArea.isSurroundingPosition(position)) {
diff --git a/src/main/java/cactusServer/entities/Instance.java b/src/main/java/cactusServer/entities/Instance.java
index 14f9d41..c89d46a 100644
--- a/src/main/java/cactusServer/entities/Instance.java
+++ b/src/main/java/cactusServer/entities/Instance.java
@@ -106,8 +106,8 @@
 		HashMap<String, Character> returnedMap = new HashMap<>();
 		for (String id : characterMap.keySet()) {
 			Character character = characterMap.get(id);
-			String[] accountURISplit = character.getAccountURI().split("/");
-			if (accountURISplit[accountURISplit.length - 1].equals(accountID)) {
+			String[] splitedAccountURI = character.getAccountURI().split("/");
+			if (splitedAccountURI[splitedAccountURI.length - 1].equals(accountID)) {
 				returnedMap.put(id, character);
 			}
 		}
diff --git a/src/main/java/cactusServer/entities/Player.java b/src/main/java/cactusServer/entities/Player.java
index 171b79c..e361d32 100644
--- a/src/main/java/cactusServer/entities/Player.java
+++ b/src/main/java/cactusServer/entities/Player.java
@@ -23,7 +23,7 @@
 	@JSONHint(ignore = true)
 	public static final int UNIQUE_ID_LENGTH = 12;
 	@JSONHint(ignore = true)
-	public static final long STOP_TIME_LIMIT = (long) (30 * 1e+9);
+	public static final long INACTIVE_TIME_LIMIT = (long) (30 * 1e+9);
 
 	private Player() {
 		// JSONDecode���̌Ăяo���p
@@ -151,10 +151,10 @@
 	}
 
 	private void updateAreaURI() {
-		String[] areaURISplit = areaURI.split("/"); // �c�c/instances/{instanceId}/areas/{areaId}
-		int splitSize = areaURISplit.length;
-		String instanceId = areaURISplit[splitSize - 3];
-		String previousAreaId = areaURISplit[splitSize - 1];
+		String[] splitedAreaURI = areaURI.split("/"); // �c�c/instances/{instanceId}/areas/{areaId}
+		int splitSize = splitedAreaURI.length;
+		String instanceId = splitedAreaURI[splitSize - 3];
+		String previousAreaId = splitedAreaURI[splitSize - 1];
 		Instance instance = Instances.getInstance().getInstance(instanceId);
 		Area previousArea = instance.getArea(previousAreaId);
 		if (!previousArea.isSurroundingPosition(position)) {
diff --git a/src/main/java/cactusServer/utils/App.java b/src/main/java/cactusServer/utils/App.java
index 0b53e96..e45fffa 100644
--- a/src/main/java/cactusServer/utils/App.java
+++ b/src/main/java/cactusServer/utils/App.java
@@ -141,7 +141,7 @@
 			// System.out.println(
 			// currentTime + ", " + (lastUpdateTime + Player.STOP_TIME_LIMIT) + " //
 			// playerId: " + playerId);
-			if (currentTime > (lastUpdateTime + Player.STOP_TIME_LIMIT)) {
+			if (currentTime > (lastUpdateTime + Player.INACTIVE_TIME_LIMIT)) {
 				System.out.println("delete started (playerId: " + playerId + ")");
 				player.destroy();
 				it.remove();