diff --git a/apps/server/src/application/coordinators/readyForGameCoordinator.ts b/apps/server/src/application/coordinators/readyForGameCoordinator.ts
index c87243b..41e1836 100644
--- a/apps/server/src/application/coordinators/readyForGameCoordinator.ts
+++ b/apps/server/src/application/coordinators/readyForGameCoordinator.ts
@@ -4,15 +4,15 @@
  */
 import {
   type GameOutputPort,
-  type GameRoomLookupPort,
   type ReadyForGamePort,
 } from "@server/domains/game/application/ports/gameUseCasePorts";
+import type { FindRoomByPlayerPort } from "@server/domains/room/application/ports/roomUseCasePorts";
 import { readyForGameUseCase } from "@server/domains/game/application/useCases/readyForGameUseCase";
 
 type ReadyForGameCoordinatorParams = {
   socketId: string;
   gameManager: ReadyForGamePort;
-  roomManager: GameRoomLookupPort;
+  roomManager: FindRoomByPlayerPort;
   output: Pick<GameOutputPort, "publishCurrentPlayersToSocket" | "publishGameStartToSocket">;
 };
 
diff --git a/apps/server/src/domains/game/application/ports/gameUseCasePorts.ts b/apps/server/src/domains/game/application/ports/gameUseCasePorts.ts
index a269b40..249545b 100644
--- a/apps/server/src/domains/game/application/ports/gameUseCasePorts.ts
+++ b/apps/server/src/domains/game/application/ports/gameUseCasePorts.ts
@@ -36,11 +36,6 @@
   markRoomWaiting(roomId: string): roomTypes.Room | undefined;
 }
 
-/** ゲーム系調停で利用するプレイヤー所属ルーム解決入力ポート */
-export interface GameRoomLookupPort {
-  getRoomByPlayerId(playerId: string): roomTypes.Room | undefined;
-}
-
 /** 準備完了ユースケースが利用するゲーム状態参照入力ポート */
 export interface ReadyForGamePort {
   getRoomPlayers(roomId: string): playerTypes.PlayerData[];
diff --git a/apps/server/src/domains/game/application/useCases/placeBombUseCase.ts b/apps/server/src/domains/game/application/useCases/placeBombUseCase.ts
index a0e1290..0e9fde1 100644
--- a/apps/server/src/domains/game/application/useCases/placeBombUseCase.ts
+++ b/apps/server/src/domains/game/application/useCases/placeBombUseCase.ts
@@ -5,12 +5,12 @@
 import type {
   BombPlacementPort,
   GameOutputPort,
-  GameRoomLookupPort,
   PlaceBombInput,
 } from "../ports/gameUseCasePorts";
+import type { FindRoomByPlayerPort } from "@server/domains/room/application/ports/roomUseCasePorts";
 
 type PlaceBombUseCaseParams = {
-  roomResolver: GameRoomLookupPort;
+  roomResolver: FindRoomByPlayerPort;
   bombStore: BombPlacementPort;
   input: PlaceBombInput;
   output: Pick<GameOutputPort, "publishBombPlacedToRoom">;
diff --git a/apps/server/src/network/handlers/game/registerGameHandlers.ts b/apps/server/src/network/handlers/game/registerGameHandlers.ts
index c9ca666..6794b78 100644
--- a/apps/server/src/network/handlers/game/registerGameHandlers.ts
+++ b/apps/server/src/network/handlers/game/registerGameHandlers.ts
@@ -6,9 +6,9 @@
 import { protocol } from "@repo/shared";
 import { readyForGameCoordinator } from "@server/application/coordinators/readyForGameCoordinator";
 import { startGameCoordinator } from "@server/application/coordinators/startGameCoordinator";
+import type { FindRoomByPlayerPort } from "@server/domains/room/application/ports/roomUseCasePorts";
 import type {
   BombStatePort,
-  GameRoomLookupPort,
   MovePlayerPort,
   ReadyForGamePort,
   StartGamePort,
@@ -35,7 +35,7 @@
   io: Server,
   socket: Socket,
   gameManager: StartGamePort & ReadyForGamePort & MovePlayerPort & BombStatePort,
-  roomManager: StartGameRoomPort & GameRoomLookupPort
+  roomManager: StartGameRoomPort & FindRoomByPlayerPort
 ) => {
   const common = createCommonHandlerContext(io, socket);
   const gameOutputAdapter = createGameOutputAdapter(common);
diff --git a/apps/server/src/network/types/connectionPorts.ts b/apps/server/src/network/types/connectionPorts.ts
index 6649026..10e3c85 100644
--- a/apps/server/src/network/types/connectionPorts.ts
+++ b/apps/server/src/network/types/connectionPorts.ts
@@ -6,7 +6,6 @@
 import type {
   BombStatePort,
   DisconnectPlayerPort,
-  GameRoomLookupPort,
   MovePlayerPort,
   ReadyForGamePort,
   StartGamePort,
@@ -31,7 +30,7 @@
 export type ConnectionRoomPort =
   & JoinRoomPort
   & StartGameRoomPort
-  & GameRoomLookupPort;
+  & FindRoomByPlayerPort;
 
 /** ソケット接続全体で利用するゲーム管理ポート集合 */
 export type SocketConnectionGamePort =