diff --git a/GameEngine/src/main/java/gameEngine/Time.java b/GameEngine/src/main/java/gameEngine/Time.java
index d7b29f2..a020435 100644
--- a/GameEngine/src/main/java/gameEngine/Time.java
+++ b/GameEngine/src/main/java/gameEngine/Time.java
@@ -5,17 +5,46 @@
     private static long lastFrameTime = System.nanoTime();
     public static float deltaTime = 0;
 
-    public static float getTime(){return (float)((System.nanoTime() - timeStarted) * 1E-9); }
+    private static final long targetFrameTimeNanos = (long) (1E9 / 120); // <- フレームタイム
+    private static long lastFpsCheckTime = System.nanoTime();
+    private static int frameCount = 0;
+    private static float currentFps = 0;
+
+    public static float getTime() {
+        return (float) ((System.nanoTime() - timeStarted) * 1E-9);
+    }
 
     public static void update() {
         long currentTime = System.nanoTime();
-        deltaTime = (float)((currentTime - lastFrameTime) * 1E-9);
+        deltaTime = (float) ((currentTime - lastFrameTime) * 1E-9);
         lastFrameTime = currentTime;
+
+        // FPSの計算
+        frameCount++;
+        if (currentTime - lastFpsCheckTime >= 1E9) {
+            currentFps = frameCount / ((currentTime - lastFpsCheckTime) * 1E-9f);
+            frameCount = 0;
+            lastFpsCheckTime = currentTime;
+            System.out.println("Current FPS: " + currentFps);
+        }
+
+        // フレームレート制限
+        long elapsedTime = currentTime - lastFrameTime;
+        if (elapsedTime < targetFrameTimeNanos) {
+            try {
+                Thread.sleep((targetFrameTimeNanos - elapsedTime) / 1_000_000);
+            } catch (InterruptedException e) {
+                Thread.currentThread().interrupt();
+            }
+        }
     }
 
     public static void reset() {
         timeStarted = System.nanoTime();
         lastFrameTime = timeStarted;
         deltaTime = 0;
+        lastFpsCheckTime = timeStarted;
+        frameCount = 0;
+        currentFps = 0;
     }
 }