diff --git a/apps/client/src/scenes/game/GameManager.ts b/apps/client/src/scenes/game/GameManager.ts
index 90b6e2a..06b088d 100644
--- a/apps/client/src/scenes/game/GameManager.ts
+++ b/apps/client/src/scenes/game/GameManager.ts
@@ -57,6 +57,10 @@
     return this.timer.getRemainingTime();
   }
 
+  public isInputEnabled(): boolean {
+    return this.canAcceptInput();
+  }
+
   public placeBomb(): string | null {
     if (!this.canAcceptInput()) return null;
     if (!this.bombManager) return null;
diff --git a/apps/client/src/scenes/game/GameScene.tsx b/apps/client/src/scenes/game/GameScene.tsx
index 84663e1..e5e7876 100644
--- a/apps/client/src/scenes/game/GameScene.tsx
+++ b/apps/client/src/scenes/game/GameScene.tsx
@@ -17,6 +17,7 @@
     pixiContainerRef,
     timeLeft,
     startCountdownText,
+    isInputEnabled,
     handleInput,
     handlePlaceBomb,
   } = useGameSceneController(myId);
@@ -25,6 +26,7 @@
     <GameView
       timeLeft={timeLeft}
       startCountdownText={startCountdownText}
+      isInputEnabled={isInputEnabled}
       pixiContainerRef={pixiContainerRef}
       onJoystickInput={handleInput}
       onPlaceBomb={handlePlaceBomb}
diff --git a/apps/client/src/scenes/game/GameView.tsx b/apps/client/src/scenes/game/GameView.tsx
index 56381f9..b84cb17 100644
--- a/apps/client/src/scenes/game/GameView.tsx
+++ b/apps/client/src/scenes/game/GameView.tsx
@@ -9,6 +9,7 @@
 type Props = {
   timeLeft: string;
   startCountdownText: string | null;
+  isInputEnabled: boolean;
   pixiContainerRef: React.RefObject<HTMLDivElement>;
   onJoystickInput: (x: number, y: number) => void;
   onPlaceBomb: () => boolean;
@@ -70,6 +71,7 @@
 export const GameView = ({
   timeLeft,
   startCountdownText,
+  isInputEnabled,
   pixiContainerRef,
   onJoystickInput,
   onPlaceBomb,
@@ -88,6 +90,7 @@
 
       {/* 入力UI レイヤー */}
       <GameInputOverlay
+        isInputEnabled={isInputEnabled}
         onJoystickInput={onJoystickInput}
         onPlaceBomb={onPlaceBomb}
       />
diff --git a/apps/client/src/scenes/game/application/GameNetworkSync.ts b/apps/client/src/scenes/game/application/GameNetworkSync.ts
index 578f5ec..08d62ef 100644
--- a/apps/client/src/scenes/game/application/GameNetworkSync.ts
+++ b/apps/client/src/scenes/game/application/GameNetworkSync.ts
@@ -41,6 +41,75 @@
   unbind: () => void;
 };
 
+type SubscriptionHandlers = {
+  handleCurrentPlayers: (serverPlayers: CurrentPlayersPayload) => void;
+  handleNewPlayer: (player: NewPlayerPayload) => void;
+  handleGameStart: (data: GameStartPayload) => void;
+  handlePlayerUpdates: (players: UpdatePlayersPayload) => void;
+  handleRemovePlayer: (id: RemovePlayerPayload) => void;
+  handleUpdateMapCells: (updates: UpdateMapCellsPayload) => void;
+  handleGameEnd: () => void;
+  handleBombPlaced: (payload: BombPlacedPayload) => void;
+  handleBombPlacedAck: (payload: BombPlacedAckPayload) => void;
+  handlePlayerDead: (payload: PlayerDeadPayload) => void;
+};
+
+const createSocketSubscriptions = ({
+  handleCurrentPlayers,
+  handleNewPlayer,
+  handleGameStart,
+  handlePlayerUpdates,
+  handleRemovePlayer,
+  handleUpdateMapCells,
+  handleGameEnd,
+  handleBombPlaced,
+  handleBombPlacedAck,
+  handlePlayerDead,
+}: SubscriptionHandlers): SocketSubscription[] => {
+  return [
+    {
+      bind: () => socketManager.game.onCurrentPlayers(handleCurrentPlayers),
+      unbind: () => socketManager.game.offCurrentPlayers(handleCurrentPlayers),
+    },
+    {
+      bind: () => socketManager.game.onNewPlayer(handleNewPlayer),
+      unbind: () => socketManager.game.offNewPlayer(handleNewPlayer),
+    },
+    {
+      bind: () => socketManager.game.onGameStart(handleGameStart),
+      unbind: () => socketManager.game.offGameStart(handleGameStart),
+    },
+    {
+      bind: () => socketManager.game.onUpdatePlayers(handlePlayerUpdates),
+      unbind: () => socketManager.game.offUpdatePlayers(handlePlayerUpdates),
+    },
+    {
+      bind: () => socketManager.game.onRemovePlayer(handleRemovePlayer),
+      unbind: () => socketManager.game.offRemovePlayer(handleRemovePlayer),
+    },
+    {
+      bind: () => socketManager.game.onUpdateMapCells(handleUpdateMapCells),
+      unbind: () => socketManager.game.offUpdateMapCells(handleUpdateMapCells),
+    },
+    {
+      bind: () => socketManager.game.onGameEnd(handleGameEnd),
+      unbind: () => socketManager.game.offGameEnd(handleGameEnd),
+    },
+    {
+      bind: () => socketManager.game.onBombPlaced(handleBombPlaced),
+      unbind: () => socketManager.game.offBombPlaced(handleBombPlaced),
+    },
+    {
+      bind: () => socketManager.game.onBombPlacedAck(handleBombPlacedAck),
+      unbind: () => socketManager.game.offBombPlacedAck(handleBombPlacedAck),
+    },
+    {
+      bind: () => socketManager.game.onPlayerDead(handlePlayerDead),
+      unbind: () => socketManager.game.offPlayerDead(handlePlayerDead),
+    },
+  ];
+};
+
 /** ゲーム中のネットワークイベント購読と同期処理を管理する */
 export class GameNetworkSync {
   private worldContainer: Container;
@@ -148,48 +217,18 @@
     this.onBombPlacedFromOthers = onBombPlacedFromOthers;
     this.onBombPlacedAckFromNetwork = onBombPlacedAckFromNetwork;
     this.onPlayerDeadFromNetwork = onPlayerDeadFromNetwork;
-    this.socketSubscriptions = [
-      {
-        bind: () => socketManager.game.onCurrentPlayers(this.handleCurrentPlayers),
-        unbind: () => socketManager.game.offCurrentPlayers(this.handleCurrentPlayers),
-      },
-      {
-        bind: () => socketManager.game.onNewPlayer(this.handleNewPlayer),
-        unbind: () => socketManager.game.offNewPlayer(this.handleNewPlayer),
-      },
-      {
-        bind: () => socketManager.game.onGameStart(this.handleGameStart),
-        unbind: () => socketManager.game.offGameStart(this.handleGameStart),
-      },
-      {
-        bind: () => socketManager.game.onUpdatePlayers(this.handlePlayerUpdates),
-        unbind: () => socketManager.game.offUpdatePlayers(this.handlePlayerUpdates),
-      },
-      {
-        bind: () => socketManager.game.onRemovePlayer(this.handleRemovePlayer),
-        unbind: () => socketManager.game.offRemovePlayer(this.handleRemovePlayer),
-      },
-      {
-        bind: () => socketManager.game.onUpdateMapCells(this.handleUpdateMapCells),
-        unbind: () => socketManager.game.offUpdateMapCells(this.handleUpdateMapCells),
-      },
-      {
-        bind: () => socketManager.game.onGameEnd(this.handleGameEnd),
-        unbind: () => socketManager.game.offGameEnd(this.handleGameEnd),
-      },
-      {
-        bind: () => socketManager.game.onBombPlaced(this.handleBombPlaced),
-        unbind: () => socketManager.game.offBombPlaced(this.handleBombPlaced),
-      },
-      {
-        bind: () => socketManager.game.onBombPlacedAck(this.handleBombPlacedAck),
-        unbind: () => socketManager.game.offBombPlacedAck(this.handleBombPlacedAck),
-      },
-      {
-        bind: () => socketManager.game.onPlayerDead(this.handlePlayerDead),
-        unbind: () => socketManager.game.offPlayerDead(this.handlePlayerDead),
-      },
-    ];
+    this.socketSubscriptions = createSocketSubscriptions({
+      handleCurrentPlayers: this.handleCurrentPlayers,
+      handleNewPlayer: this.handleNewPlayer,
+      handleGameStart: this.handleGameStart,
+      handlePlayerUpdates: this.handlePlayerUpdates,
+      handleRemovePlayer: this.handleRemovePlayer,
+      handleUpdateMapCells: this.handleUpdateMapCells,
+      handleGameEnd: this.handleGameEnd,
+      handleBombPlaced: this.handleBombPlaced,
+      handleBombPlacedAck: this.handleBombPlacedAck,
+      handlePlayerDead: this.handlePlayerDead,
+    });
   }
 
   public bind() {
diff --git a/apps/client/src/scenes/game/hooks/useGameSceneController.ts b/apps/client/src/scenes/game/hooks/useGameSceneController.ts
index 67bc2fe..3e40bd6 100644
--- a/apps/client/src/scenes/game/hooks/useGameSceneController.ts
+++ b/apps/client/src/scenes/game/hooks/useGameSceneController.ts
@@ -26,6 +26,7 @@
   const [startCountdownText, setStartCountdownText] = useState<string | null>(
     null,
   );
+  const [isInputEnabled, setIsInputEnabled] = useState(false);
 
   useEffect(() => {
     if (!pixiContainerRef.current || !myId) return;
@@ -52,6 +53,11 @@
       setStartCountdownText((prev) =>
         prev === nextCountdown ? prev : nextCountdown,
       );
+
+      const nextInputEnabled = manager.isInputEnabled();
+      setIsInputEnabled((prev) =>
+        prev === nextInputEnabled ? prev : nextInputEnabled,
+      );
     }, config.GAME_CONFIG.TIMER_DISPLAY_UPDATE_MS);
 
     return () => {
@@ -60,6 +66,7 @@
       inputManagerRef.current = null;
       clearInterval(timerInterval);
       setStartCountdownText(null);
+      setIsInputEnabled(false);
     };
   }, [myId]);
 
@@ -75,6 +82,7 @@
     pixiContainerRef,
     timeLeft,
     startCountdownText,
+    isInputEnabled,
     handleInput,
     handlePlaceBomb,
   };
diff --git a/apps/client/src/scenes/game/input/GameInputOverlay.tsx b/apps/client/src/scenes/game/input/GameInputOverlay.tsx
index 09c2626..b1e7bb3 100644
--- a/apps/client/src/scenes/game/input/GameInputOverlay.tsx
+++ b/apps/client/src/scenes/game/input/GameInputOverlay.tsx
@@ -10,6 +10,7 @@
 
 /** 入力UIレイヤーの入力プロパティ */
 type GameInputOverlayProps = {
+  isInputEnabled: boolean;
   onJoystickInput: (x: number, y: number) => void;
   onPlaceBomb: () => boolean;
 };
@@ -25,6 +26,7 @@
 
 /** 入力UIレイヤーを描画する */
 export const GameInputOverlay = ({
+  isInputEnabled,
   onJoystickInput,
   onPlaceBomb,
 }: GameInputOverlayProps) => {
@@ -79,7 +81,7 @@
   }, [bombCooldownMs, lastBombPressedAt, nowMs]);
 
   const handlePressBomb = () => {
-    if (!cooldownState.isReady) {
+    if (!isInputEnabled || !cooldownState.isReady) {
       return;
     }
 
@@ -94,11 +96,14 @@
 
   return (
     <div style={UI_LAYER_STYLE}>
-      <JoystickInputPresenter onInput={onJoystickInput} />
+      <JoystickInputPresenter
+        onInput={onJoystickInput}
+        isEnabled={isInputEnabled}
+      />
       <BombButton
         onPress={handlePressBomb}
         cooldownProgress={cooldownState.progress}
-        isReady={cooldownState.isReady}
+        isReady={isInputEnabled && cooldownState.isReady}
         remainingSecText={cooldownState.remainingSecText}
       />
     </div>
diff --git a/apps/client/src/scenes/game/input/joystick/JoystickInputPresenter.tsx b/apps/client/src/scenes/game/input/joystick/JoystickInputPresenter.tsx
index 0d1d096..cc49572 100644
--- a/apps/client/src/scenes/game/input/joystick/JoystickInputPresenter.tsx
+++ b/apps/client/src/scenes/game/input/joystick/JoystickInputPresenter.tsx
@@ -11,6 +11,7 @@
 export const JoystickInputPresenter = ({
   onInput,
   maxDist,
+  isEnabled = true,
 }: UseJoystickInputPresenterProps) => {
   const {
     isMoving,
@@ -24,11 +25,11 @@
 
   return (
     <div
-      onPointerDown={handleStart}
-      onPointerMove={handleMove}
-      onPointerUp={handleEnd}
-      onPointerCancel={handleEnd}
-      onLostPointerCapture={handleEnd}
+      onPointerDown={isEnabled ? handleStart : undefined}
+      onPointerMove={isEnabled ? handleMove : undefined}
+      onPointerUp={isEnabled ? handleEnd : undefined}
+      onPointerCancel={isEnabled ? handleEnd : undefined}
+      onLostPointerCapture={isEnabled ? handleEnd : undefined}
       style={{
         position: "absolute",
         top: 0,
@@ -38,6 +39,7 @@
         // キャンバス前面入力キャプチャレイヤー
         zIndex: 10,
         touchAction: "none",
+        pointerEvents: isEnabled ? "auto" : "none",
       }}
     >
       {/* 入力イベントをコントローラーへ渡し，描画用状態をViewへ渡す */}
diff --git a/apps/client/src/scenes/game/input/joystick/common/joystick.types.ts b/apps/client/src/scenes/game/input/joystick/common/joystick.types.ts
index b1c89db..d86c755 100644
--- a/apps/client/src/scenes/game/input/joystick/common/joystick.types.ts
+++ b/apps/client/src/scenes/game/input/joystick/common/joystick.types.ts
@@ -52,6 +52,7 @@
 export type UseJoystickInputPresenterProps = {
   onInput: (moveX: number, moveY: number) => void;
   maxDist?: number;
+  isEnabled?: boolean;
 };
 
 /** JoystickView に渡す描画状態型 */
diff --git a/apps/server/src/domains/game/application/useCases/reportBombHitUseCase.ts b/apps/server/src/domains/game/application/useCases/reportBombHitUseCase.ts
index f65ccdf..5bbe2e4 100644
--- a/apps/server/src/domains/game/application/useCases/reportBombHitUseCase.ts
+++ b/apps/server/src/domains/game/application/useCases/reportBombHitUseCase.ts
@@ -7,7 +7,7 @@
   BombHitReportValidationPort,
   ReportBombHitInput,
 } from "../ports/gameUseCasePorts";
-import { createBombHitReportDedupeKey } from "@server/domains/game/entities/bomb/bombHitReport";
+import { shouldPublishPlayerDeadFromBombHit } from "./reportBombHitValidation";
 
 type ReportBombHitUseCaseParams = {
   roomId: string;
@@ -16,18 +16,6 @@
   output: BombHitOutputPort;
 };
 
-/** 受信した被弾報告を処理対象にすべきか判定する */
-const shouldPublishPlayerDeadFromBombHit = (
-  validation: BombHitReportValidationPort,
-  input: ReportBombHitInput,
-): boolean => {
-  const dedupeKey = createBombHitReportDedupeKey(
-    input.socketId,
-    input.payload.bombId,
-  );
-  return validation.shouldBroadcastBombHitReport(dedupeKey, input.nowMs);
-};
-
 /** 被弾報告を死亡通知へ変換して配信する */
 const publishPlayerDeadFromBombHit = (
   roomId: string,
diff --git a/apps/server/src/domains/game/application/useCases/reportBombHitValidation.ts b/apps/server/src/domains/game/application/useCases/reportBombHitValidation.ts
new file mode 100644
index 0000000..7dfd691
--- /dev/null
+++ b/apps/server/src/domains/game/application/useCases/reportBombHitValidation.ts
@@ -0,0 +1,17 @@
+import type {
+  BombHitReportValidationPort,
+  ReportBombHitInput,
+} from "../ports/gameUseCasePorts";
+import { createBombHitReportDedupeKey } from "@server/domains/game/entities/bomb/bombHitReport";
+
+/** 受信した被弾報告を処理対象にすべきか判定する */
+export const shouldPublishPlayerDeadFromBombHit = (
+  validation: BombHitReportValidationPort,
+  input: ReportBombHitInput,
+): boolean => {
+  const dedupeKey = createBombHitReportDedupeKey(
+    input.socketId,
+    input.payload.bombId,
+  );
+  return validation.shouldBroadcastBombHitReport(dedupeKey, input.nowMs);
+};