diff --git a/apps/client/src/scenes/game/GameInputManager.ts b/apps/client/src/scenes/game/GameInputManager.ts
index 9017d1e..3fde571 100644
--- a/apps/client/src/scenes/game/GameInputManager.ts
+++ b/apps/client/src/scenes/game/GameInputManager.ts
@@ -5,9 +5,12 @@
 /** ジョイスティック入力をゲーム管理へ橋渡しするマネージャー */
 export class GameInputManager {
   private onJoystickInput: (x: number, y: number) => void;
-  private onPlaceBomb: () => void;
+  private onPlaceBomb: () => boolean;
 
-  constructor(onJoystickInput: (x: number, y: number) => void, onPlaceBomb: () => void) {
+  constructor(
+    onJoystickInput: (x: number, y: number) => void,
+    onPlaceBomb: () => boolean,
+  ) {
     this.onJoystickInput = onJoystickInput;
     this.onPlaceBomb = onPlaceBomb;
   }
@@ -16,7 +19,7 @@
     this.onJoystickInput(x, y);
   };
 
-  public handlePlaceBomb = () => {
-    this.onPlaceBomb();
+  public handlePlaceBomb = (): boolean => {
+    return this.onPlaceBomb();
   };
 }
diff --git a/apps/client/src/scenes/game/GameView.tsx b/apps/client/src/scenes/game/GameView.tsx
index 904118f..56381f9 100644
--- a/apps/client/src/scenes/game/GameView.tsx
+++ b/apps/client/src/scenes/game/GameView.tsx
@@ -11,7 +11,7 @@
   startCountdownText: string | null;
   pixiContainerRef: React.RefObject<HTMLDivElement>;
   onJoystickInput: (x: number, y: number) => void;
-  onPlaceBomb: () => void;
+  onPlaceBomb: () => boolean;
 };
 
 const ROOT_STYLE: React.CSSProperties = {
diff --git a/apps/client/src/scenes/game/hooks/useGameSceneController.ts b/apps/client/src/scenes/game/hooks/useGameSceneController.ts
index f2ddb49..67bc2fe 100644
--- a/apps/client/src/scenes/game/hooks/useGameSceneController.ts
+++ b/apps/client/src/scenes/game/hooks/useGameSceneController.ts
@@ -39,7 +39,7 @@
         manager.setJoystickInput(x, y);
       },
       () => {
-        manager.placeBomb();
+        return manager.placeBomb() !== null;
       },
     );
 
@@ -67,8 +67,8 @@
     inputManagerRef.current?.handleJoystickInput(x, y);
   }, []);
 
-  const handlePlaceBomb = useCallback(() => {
-    inputManagerRef.current?.handlePlaceBomb();
+  const handlePlaceBomb = useCallback((): boolean => {
+    return inputManagerRef.current?.handlePlaceBomb() ?? false;
   }, []);
 
   return {
diff --git a/apps/client/src/scenes/game/input/GameInputOverlay.tsx b/apps/client/src/scenes/game/input/GameInputOverlay.tsx
index da31f27..09c2626 100644
--- a/apps/client/src/scenes/game/input/GameInputOverlay.tsx
+++ b/apps/client/src/scenes/game/input/GameInputOverlay.tsx
@@ -11,7 +11,7 @@
 /** 入力UIレイヤーの入力プロパティ */
 type GameInputOverlayProps = {
   onJoystickInput: (x: number, y: number) => void;
-  onPlaceBomb: () => void;
+  onPlaceBomb: () => boolean;
 };
 
 const UI_LAYER_STYLE: React.CSSProperties = {
@@ -83,7 +83,11 @@
       return;
     }
 
-    onPlaceBomb();
+    const placed = onPlaceBomb();
+    if (!placed) {
+      return;
+    }
+
     setLastBombPressedAt(Date.now());
     setNowMs(Date.now());
   };
diff --git a/apps/client/src/scenes/game/input/bomb/BombButton.tsx b/apps/client/src/scenes/game/input/bomb/BombButton.tsx
index 3be3c10..ad71a55 100644
--- a/apps/client/src/scenes/game/input/bomb/BombButton.tsx
+++ b/apps/client/src/scenes/game/input/bomb/BombButton.tsx
@@ -85,8 +85,13 @@
     onPress();
   };
 
+  const handlePointerDown = (event: React.PointerEvent<HTMLDivElement>) => {
+    event.preventDefault();
+    handleActivate();
+  };
+
   return (
-    <div style={hitAreaStyle} onClick={handleActivate}>
+    <div style={hitAreaStyle} onPointerDown={handlePointerDown}>
       <div style={frameStyle}>
         <button
           style={buttonStyle}
diff --git a/apps/client/src/scenes/game/input/joystick/JoystickInputPresenter.tsx b/apps/client/src/scenes/game/input/joystick/JoystickInputPresenter.tsx
index ad6d91f..0d1d096 100644
--- a/apps/client/src/scenes/game/input/joystick/JoystickInputPresenter.tsx
+++ b/apps/client/src/scenes/game/input/joystick/JoystickInputPresenter.tsx
@@ -28,6 +28,7 @@
       onPointerMove={handleMove}
       onPointerUp={handleEnd}
       onPointerCancel={handleEnd}
+      onLostPointerCapture={handleEnd}
       style={{
         position: "absolute",
         top: 0,