diff --git a/src/main/java/entities/modelExtentions/Flags.java b/src/main/java/entities/modelExtentions/Flags.java
deleted file mode 100644
index 95f5d80..0000000
--- a/src/main/java/entities/modelExtentions/Flags.java
+++ /dev/null
@@ -1,77 +0,0 @@
-package entities.modelExtentions;
-
-import java.io.IOException;
-import java.nio.charset.Charset;
-import java.nio.file.Files;
-import java.nio.file.Path;
-import java.nio.file.Paths;
-import java.util.ArrayList;
-import java.util.List;
-
-public class Flags {
-
-    private ArrayList<Integer> values = new ArrayList<>();
-    private int count = 0;
-
-    //---------------------------------------------------------------
-    //---------------------------------------------------------------
-    public Flags() {
-        Path file = Paths.get("resources/stage.txt");
-        String[] data = new String[1];
-
-        try {
-            List<String> lines = Files.readAllLines(file, Charset.forName("Shift-JIS"));
-
-            for (int i = 0; i < lines.size(); i++) data = lines.get(i).split(",");
-            for (int i = 0; i < data.length; i++) values.add(Integer.parseInt(data[i]));
-            for (int v : values) System.out.println(v);
-
-        } catch (IOException e) {
-            System.out.println("Failed to load stage.txt");
-        }
-    }
-
-    //---------------------------------------------------------------
-    //---------------------------------------------------------------
-    // getter
-    public ArrayList<Integer> getValues() {
-        return values;
-    }
-
-    //---------------------------------------------------------------
-    //---------------------------------------------------------------
-    // フラグのタイミングと一致しているかをチェック
-    public boolean isFlag(int timing) {
-        for (int flag : values)
-            if (timing == flag) return true;
-        return false;
-    }
-
-    //---------------------------------------------------------------
-    // 奇数番目のフラグで穴を開けるフラグを提示する
-    public boolean isOpenFlag(double x) {
-
-        if (count % 2 != 0) return false;
-
-        double cx = (double) values.get(count) - 0.5;
-        if (cx <= x) {
-            if (count < values.size() - 1) count++;
-            return true;
-        }
-        return false;
-    }
-
-    //---------------------------------------------------------------
-    // 偶数番目のフラグで穴を閉じるフラグを提示する
-    public boolean isCloseFlag(double x) {
-        if (count % 2 == 0) return false;
-
-        double cx = (double) values.get(count) - 0.5;
-        if (cx <= x + 0.25) {
-            if (count < values.size() - 1) count++;
-            return true;
-        }
-        return false;
-    }
-
-}
diff --git a/src/main/java/entities/modelExtentions/Stage.java b/src/main/java/entities/modelExtentions/Stage.java
new file mode 100644
index 0000000..1146f2e
--- /dev/null
+++ b/src/main/java/entities/modelExtentions/Stage.java
@@ -0,0 +1,77 @@
+package entities.modelExtentions;
+
+import java.io.IOException;
+import java.nio.charset.Charset;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.ArrayList;
+import java.util.List;
+
+public class Stage {
+
+    private ArrayList<Integer> values = new ArrayList<>();
+    private int count = 0;
+
+    //---------------------------------------------------------------
+    //---------------------------------------------------------------
+    public Stage() {
+        Path file = Paths.get("resources/stage.txt");
+        String[] data = new String[1];
+
+        try {
+            List<String> lines = Files.readAllLines(file, Charset.forName("Shift-JIS"));
+
+            for (int i = 0; i < lines.size(); i++) data = lines.get(i).split(",");
+            for (int i = 0; i < data.length; i++) values.add(Integer.parseInt(data[i]));
+            for (int v : values) System.out.println(v);
+
+        } catch (IOException e) {
+            System.out.println("Failed to load stage.txt");
+        }
+    }
+
+    //---------------------------------------------------------------
+    //---------------------------------------------------------------
+    // getter
+    public ArrayList<Integer> getValues() {
+        return values;
+    }
+
+    //---------------------------------------------------------------
+    //---------------------------------------------------------------
+    // フラグのタイミングと一致しているかをチェック
+    public boolean isFlag(int timing) {
+        for (int flag : values)
+            if (timing == flag) return true;
+        return false;
+    }
+
+    //---------------------------------------------------------------
+    // 奇数番目のフラグで穴を開けるフラグを提示する
+    public boolean isOpenFlag(double x) {
+
+        if (count % 2 != 0) return false;
+
+        double cx = (double) values.get(count) - 0.5;
+        if (cx <= x) {
+            if (count < values.size() - 1) count++;
+            return true;
+        }
+        return false;
+    }
+
+    //---------------------------------------------------------------
+    // 偶数番目のフラグで穴を閉じるフラグを提示する
+    public boolean isCloseFlag(double x) {
+        if (count % 2 == 0) return false;
+
+        double cx = (double) values.get(count) - 0.5;
+        if (cx <= x + 0.25) {
+            if (count < values.size() - 1) count++;
+            return true;
+        }
+        return false;
+    }
+
+}
diff --git a/src/main/java/models/JumpGameModel.java b/src/main/java/models/JumpGameModel.java
index 41b04fd..9e6d387 100644
--- a/src/main/java/models/JumpGameModel.java
+++ b/src/main/java/models/JumpGameModel.java
@@ -1,16 +1,7 @@
 package models;
 
 import entities.*;
-import entities.modelExtentions.Flags;
-
-import javax.swing.plaf.synth.SynthTextAreaUI;
-import java.io.IOException;
-import java.nio.charset.Charset;
-import java.nio.file.Files;
-import java.nio.file.Path;
-import java.nio.file.Paths;
-import java.util.ArrayList;
-import java.util.List;
+import entities.modelExtentions.Stage;
 
 //---------------------------------------------------------------
 //
@@ -36,7 +27,7 @@
     private double jumpPower = 256;
 
     //---------------------------------------------------------------
-    private Flags flags;
+    private Stage stage;
 
     //---------------------------------------------------------------
     //---------------------------------------------------------------
@@ -53,14 +44,14 @@
         time = new Time();
         gameover = new Gameover(position);
         clear = new Clear(position);
-        flags = new Flags();
+        stage = new Stage();
     }
 
     //---------------------------------------------------------------
     //---------------------------------------------------------------
     // getter
-    public Flags getFlags() {
-        return flags;
+    public Stage getStage() {
+        return stage;
     }
 
     public Pair<Double> getPosition() {
@@ -139,8 +130,8 @@
     public void updateGroundFlag() {
         double x = position.getValue().getFirst();
 
-        if (flags.isOpenFlag(x)) ground.openHole();
-        if (flags.isCloseFlag(x)) ground.closeHole();
+        if (stage.isOpenFlag(x)) ground.openHole();
+        if (stage.isCloseFlag(x)) ground.closeHole();
 
         System.out.print("x: " + x + "/");
         System.out.println("Ground: " + ground.getValue() + "/");
diff --git a/src/main/java/views/TileMapRenderer.java b/src/main/java/views/TileMapRenderer.java
index cff741f..b7d4c64 100644
--- a/src/main/java/views/TileMapRenderer.java
+++ b/src/main/java/views/TileMapRenderer.java
@@ -1,7 +1,7 @@
 package views;
 
 import entities.Pair;
-import entities.modelExtentions.Flags;
+import entities.modelExtentions.Stage;
 import models.IModel;
 import models.JumpGameModel;
 
@@ -19,7 +19,7 @@
     //---------------------------------------------------------------
     public TileMapRenderer(IModel model) {
         JumpGameModel jumpGameModel = (JumpGameModel) model;
-        initTiles(jumpGameModel.getFlags());
+        initTiles(jumpGameModel.getStage());
     }
 
     //---------------------------------------------------------------
@@ -48,7 +48,7 @@
     //--------------------------------------------------------------
     //---------------------------------------------------------------
     // 初期タイル作成
-    private void initTiles(Flags flags) {
+    private void initTiles(Stage stage) {
         boolean isOpen = false;
         int space = 10;
 
@@ -63,7 +63,7 @@
             double x = 32 * newTile.getScaleValue() * (i + space);
 
             // フラグのチェック
-            if (flags.isFlag(i)) isOpen = !isOpen;
+            if (stage.isFlag(i)) isOpen = !isOpen;
 
             // タイルの切り替え
             if (isOpen) addNewTile(x, TileType.OPEN);