diff --git a/apps/server/src/application/coordinators/startGameCoordinator.ts b/apps/server/src/application/coordinators/startGameCoordinator.ts
index 7704ace..2bc6080 100644
--- a/apps/server/src/application/coordinators/startGameCoordinator.ts
+++ b/apps/server/src/application/coordinators/startGameCoordinator.ts
@@ -20,7 +20,6 @@
   roomManager: FindRoomByOwnerPort & RoomPhaseTransitionPort & FindGameByRoomPort;
   output: Pick<
     GameOutputPort,
-    | "publishUpdatePlayersToRoom"
     | "publishUpdatePlayersToSocket"
     | "publishMapCellUpdatesToRoom"
     | "publishGameEndToRoom"
diff --git a/apps/server/src/domains/game/application/ports/gameUseCasePorts.ts b/apps/server/src/domains/game/application/ports/gameUseCasePorts.ts
index 2a36a52..797aaa6 100644
--- a/apps/server/src/domains/game/application/ports/gameUseCasePorts.ts
+++ b/apps/server/src/domains/game/application/ports/gameUseCasePorts.ts
@@ -47,10 +47,6 @@
 /** ゲーム系ユースケースが利用する送信出力ポート */
 export interface GameOutputPort {
   publishPongToSocket(payload: PongPayload): void;
-  publishUpdatePlayersToRoom(
-    roomId: roomTypes.Room["roomId"],
-    players: UpdatePlayersPayload
-  ): void;
   publishUpdatePlayersToSocket(
     socketId: string,
     players: UpdatePlayersPayload
diff --git a/apps/server/src/domains/game/application/useCases/startGameUseCase.ts b/apps/server/src/domains/game/application/useCases/startGameUseCase.ts
index 6a205a5..db39423 100644
--- a/apps/server/src/domains/game/application/useCases/startGameUseCase.ts
+++ b/apps/server/src/domains/game/application/useCases/startGameUseCase.ts
@@ -20,7 +20,6 @@
   onGameEnd: () => void;
   output: Pick<
     GameOutputPort,
-    | "publishUpdatePlayersToRoom"
     | "publishUpdatePlayersToSocket"
     | "publishMapCellUpdatesToRoom"
     | "publishGameEndToRoom"
diff --git a/apps/server/src/domains/game/application/useCases/useCaseRoomResolver.ts b/apps/server/src/domains/game/application/useCases/useCaseRoomResolver.ts
deleted file mode 100644
index 9096941..0000000
--- a/apps/server/src/domains/game/application/useCases/useCaseRoomResolver.ts
+++ /dev/null
@@ -1,13 +0,0 @@
-/**
- * useCaseRoomResolver
- * ゲーム系ユースケースで利用するルーム解決処理を提供する
- */
-import type { FindRoomByPlayerPort } from "@server/domains/room/application/ports/roomUseCasePorts";
-
-/** ソケットIDから所属ルームIDを解決して返す */
-export const resolveRoomIdBySocketId = (
-  roomResolver: FindRoomByPlayerPort,
-  socketId: string
-): string | undefined => {
-  return roomResolver.getRoomByPlayerId(socketId)?.roomId;
-};
diff --git a/apps/server/src/network/handlers/game/createGameOutputAdapter.ts b/apps/server/src/network/handlers/game/createGameOutputAdapter.ts
index 4b18fd0..78fa94a 100644
--- a/apps/server/src/network/handlers/game/createGameOutputAdapter.ts
+++ b/apps/server/src/network/handlers/game/createGameOutputAdapter.ts
@@ -37,9 +37,6 @@
     publishPongToSocket: (payload: PongPayload) => {
       common.emitToSocket(protocol.SocketEvents.PONG, payload);
     },
-    publishUpdatePlayersToRoom: (roomId: RoomId, players: UpdatePlayersPayload) => {
-      common.emitToRoom(roomId, protocol.SocketEvents.UPDATE_PLAYERS, players);
-    },
     publishUpdatePlayersToSocket: (socketId: string, players: UpdatePlayersPayload) => {
       common.emitToSocketById(socketId, protocol.SocketEvents.UPDATE_PLAYERS, players);
     },
diff --git a/apps/server/src/network/types/connectionPorts.ts b/apps/server/src/network/types/connectionPorts.ts
index 4651b69..f5dce4c 100644
--- a/apps/server/src/network/types/connectionPorts.ts
+++ b/apps/server/src/network/types/connectionPorts.ts
@@ -13,7 +13,6 @@
   JoinRoomPort,
   RoomPhaseTransitionPort,
 } from "@server/domains/room/application/ports/roomUseCasePorts";
-import type { DisconnectCoordinatorParams } from "../../application/coordinators/disconnectCoordinator";
 
 /** 接続時のルーム処理で利用する入力ポート集合 */
 export type ConnectionRoomPort =
@@ -35,15 +34,6 @@
   roomManager: SocketConnectionRoomPort;
 };
 
-/** 切断時のルーム処理で利用する入力ポート集合 */
-export type DisconnectRoomHandlerPort = Pick<
-  SocketConnectionRoomPort,
-  "removePlayer" | "getRoomByPlayerId" | "getRoomById"
->;
-
-/** 切断調停処理へ受け渡す依存集合 */
-export type DisconnectCoordinatorPortBundle = Omit<DisconnectCoordinatorParams, "socketId">;
-
 /** 接続ハンドラ登録関数が受け取る入力パラメータ */
 export type RegisterConnectionHandlersParams = SocketConnectionManagerBundle & {
   io: Server;