diff --git a/apps/server/src/application/coordinators/disconnectCoordinator.ts b/apps/server/src/application/coordinators/disconnectCoordinator.ts
index 8f0d0ce..52acd07 100644
--- a/apps/server/src/application/coordinators/disconnectCoordinator.ts
+++ b/apps/server/src/application/coordinators/disconnectCoordinator.ts
@@ -19,9 +19,8 @@
 /** 切断調停で利用する入力ポートと出力ポートの契約 */
 export type DisconnectCoordinatorParams = {
   socketId: string;
-  gameManager: DisconnectPlayerPort;
+  gameManager: DisconnectPlayerPort & BombRoomStateCleanupPort;
   roomManager: DisconnectRoomPort & FindRoomByPlayerPort & FindRoomByIdPort;
-  bombStateStore: BombRoomStateCleanupPort;
   gameOutput: Pick<GameOutputPort, "publishPlayerRemovedToRoom">;
   roomOutput: Pick<RoomOutputPort, "publishRoomUpdateToRoom">;
 };
@@ -31,7 +30,6 @@
   socketId,
   gameManager,
   roomManager,
-  bombStateStore,
   gameOutput,
   roomOutput,
 }: DisconnectCoordinatorParams) => {
@@ -51,6 +49,6 @@
   });
 
   if (roomId && !roomManager.getRoomById(roomId)) {
-    bombStateStore.clearBombRoomState(roomId, "room-deleted");
+    gameManager.clearBombRoomState(roomId, "room-deleted");
   }
 };
diff --git a/apps/server/src/application/coordinators/startGameCoordinator.ts b/apps/server/src/application/coordinators/startGameCoordinator.ts
index c1f9bfa..d96240a 100644
--- a/apps/server/src/application/coordinators/startGameCoordinator.ts
+++ b/apps/server/src/application/coordinators/startGameCoordinator.ts
@@ -15,9 +15,8 @@
 
 type StartGameCoordinatorParams = {
   ownerId: string;
-  gameManager: StartGamePort;
+  gameManager: StartGamePort & BombRoomStateCleanupPort;
   roomManager: StartGameRoomPort;
-  bombStateStore: BombRoomStateCleanupPort;
   output: Pick<
     GameOutputPort,
     | "publishUpdatePlayersToRoom"
@@ -33,7 +32,6 @@
   ownerId,
   gameManager,
   roomManager,
-  bombStateStore,
   output,
 }: StartGameCoordinatorParams) => {
   const room = roomManager.getRoomByOwnerId(ownerId);
@@ -83,7 +81,7 @@
     gameManager,
     onGameEnd: () => {
       roomManager.markRoomWaiting(updatedRoom.roomId);
-      bombStateStore.clearBombRoomState(updatedRoom.roomId, "game-ended");
+      gameManager.clearBombRoomState(updatedRoom.roomId, "game-ended");
     },
     output,
   });
diff --git a/apps/server/src/domains/game/GameManager.ts b/apps/server/src/domains/game/GameManager.ts
index 389f85c..4a4bdd4 100644
--- a/apps/server/src/domains/game/GameManager.ts
+++ b/apps/server/src/domains/game/GameManager.ts
@@ -3,6 +3,11 @@
  * ゲームセッション集合の生成，更新，参照管理を統括する
  */
 import type { gameTypes, GameResultPayload } from "@repo/shared";
+import {
+  clearBombRoomState,
+  issueServerBombId,
+  shouldBroadcastBombPlaced,
+} from "./entities/bomb/BombRoomStateStore";
 import { Player } from "./entities/player/Player.js";
 import { GameRoomSession } from "./application/services/GameRoomSession";
 import { GameSessionLifecycleService } from "./application/services/GameSessionLifecycleService";
@@ -59,4 +64,19 @@
   getRoomPlayers(roomId: string): Player[] {
     return this.lifecycleService.getRoomPlayers(roomId);
   }
+
+  // 爆弾設置イベントを配信すべきか判定し，配信時は重複排除状態を更新する
+  shouldBroadcastBombPlaced(roomId: string, dedupeKey: string, nowMs: number): boolean {
+    return shouldBroadcastBombPlaced(roomId, dedupeKey, nowMs);
+  }
+
+  // ルーム単位の連番からサーバー採番の爆弾IDを生成する
+  issueServerBombId(roomId: string): string {
+    return issueServerBombId(roomId);
+  }
+
+  // 指定ルームの爆弾採番状態と重複排除状態を破棄する
+  clearBombRoomState(roomId: string, reason: "game-ended" | "room-deleted"): void {
+    clearBombRoomState(roomId, reason);
+  }
 }
\ No newline at end of file
diff --git a/apps/server/src/network/handlers/game/createBombRoomStateStoreAdapter.ts b/apps/server/src/network/handlers/game/createBombRoomStateStoreAdapter.ts
deleted file mode 100644
index 0d5215b..0000000
--- a/apps/server/src/network/handlers/game/createBombRoomStateStoreAdapter.ts
+++ /dev/null
@@ -1,19 +0,0 @@
-/**
- * createBombRoomStateStoreAdapter
- * 爆弾状態ストア実装をネットワーク層向けの入力ポートへ変換する
- */
-import type { BombRoomStateStorePort } from "@server/domains/game/application/ports/gameUseCasePorts";
-import {
-  clearBombRoomState,
-  issueServerBombId,
-  shouldBroadcastBombPlaced,
-} from "@server/domains/game/entities/bomb/BombRoomStateStore";
-
-/** 爆弾状態ストア入力ポートの実装を生成する */
-export const createBombRoomStateStoreAdapter = (): BombRoomStateStorePort => {
-  return {
-    clearBombRoomState,
-    issueServerBombId,
-    shouldBroadcastBombPlaced,
-  };
-};
diff --git a/apps/server/src/network/handlers/game/registerGameHandlers.ts b/apps/server/src/network/handlers/game/registerGameHandlers.ts
index 37352c6..ad9a157 100644
--- a/apps/server/src/network/handlers/game/registerGameHandlers.ts
+++ b/apps/server/src/network/handlers/game/registerGameHandlers.ts
@@ -35,9 +35,8 @@
 export const registerGameHandlers = (
   io: Server,
   socket: Socket,
-  gameManager: StartGamePort & ReadyForGamePort & MovePlayerPort,
-  roomManager: StartGameRoomPort & ReadyForGameRoomPort & PlaceBombRoomPort,
-  bombStateStore: BombRoomStateStorePort
+  gameManager: StartGamePort & ReadyForGamePort & MovePlayerPort & BombRoomStateStorePort,
+  roomManager: StartGameRoomPort & ReadyForGameRoomPort & PlaceBombRoomPort
 ) => {
   const common = createCommonHandlerContext(io, socket);
   const gameOutputAdapter = createGameOutputAdapter(common);
@@ -73,7 +72,6 @@
       ownerId: socket.id,
       gameManager,
       roomManager,
-      bombStateStore,
       output: gameOutputAdapter,
     });
   });
@@ -109,7 +107,7 @@
 
     placeBombUseCase({
       roomResolver: roomManager,
-      bombStore: bombStateStore,
+      bombStore: gameManager,
       input: {
         socketId: socket.id,
         payload: data,
diff --git a/apps/server/src/network/handlers/registerConnectionHandlers.ts b/apps/server/src/network/handlers/registerConnectionHandlers.ts
index 7c2466a..66850a8 100644
--- a/apps/server/src/network/handlers/registerConnectionHandlers.ts
+++ b/apps/server/src/network/handlers/registerConnectionHandlers.ts
@@ -9,7 +9,6 @@
 import { logResults, logScopes } from "@server/logging/index";
 import { registerGameHandlers } from "./GameHandler";
 import { registerRoomHandlers } from "./RoomHandler";
-import { createBombRoomStateStoreAdapter } from "./game/createBombRoomStateStoreAdapter";
 import { createGameDisconnectOutputAdapter } from "./game/createGameOutputAdapter";
 import { createRoomDisconnectOutputAdapter } from "./room/createRoomOutputAdapter";
 import type {
@@ -24,7 +23,6 @@
 }: RegisterConnectionHandlersParams) => {
   const gameDisconnectOutputAdapter = createGameDisconnectOutputAdapter(io);
   const roomDisconnectOutputAdapter = createRoomDisconnectOutputAdapter(io);
-  const bombStateStoreAdapter = createBombRoomStateStoreAdapter();
 
   io.on(protocol.SocketEvents.CONNECT, (socket: Socket) => {
     // 接続ログを記録してドメイン別ハンドラを登録する
@@ -35,7 +33,7 @@
     });
 
     registerRoomHandlers(io, socket, roomManager);
-    registerGameHandlers(io, socket, gameManager, roomManager, bombStateStoreAdapter);
+    registerGameHandlers(io, socket, gameManager, roomManager);
 
     socket.on(protocol.SocketEvents.DISCONNECT, () => {
       // 切断ログ記録後にドメイン別の後処理を実行する
@@ -49,7 +47,6 @@
         socketId: socket.id,
         gameManager,
         roomManager,
-        bombStateStore: bombStateStoreAdapter,
         gameOutput: gameDisconnectOutputAdapter,
         roomOutput: roomDisconnectOutputAdapter,
       });
diff --git a/apps/server/src/network/types/connectionPorts.ts b/apps/server/src/network/types/connectionPorts.ts
index 6624da9..0ddfd48 100644
--- a/apps/server/src/network/types/connectionPorts.ts
+++ b/apps/server/src/network/types/connectionPorts.ts
@@ -4,6 +4,7 @@
  */
 import type { Server } from "socket.io";
 import type {
+  BombRoomStateStorePort,
   DisconnectPlayerPort,
   MovePlayerPort,
   ReadyForGamePort,
@@ -23,7 +24,8 @@
 export type ConnectionGamePort =
   & StartGamePort
   & ReadyForGamePort
-  & MovePlayerPort;
+  & MovePlayerPort
+  & BombRoomStateStorePort;
 
 /** 接続時のルーム処理で利用する入力ポート集合 */
 export type ConnectionRoomPort =