diff --git a/apps/server/src/application/coordinators/disconnectCoordinator.ts b/apps/server/src/application/coordinators/disconnectCoordinator.ts
index 4d40e81..c81b8cf 100644
--- a/apps/server/src/application/coordinators/disconnectCoordinator.ts
+++ b/apps/server/src/application/coordinators/disconnectCoordinator.ts
@@ -2,16 +2,19 @@
  * disconnectCoordinator
  * DISCONNECTイベントの調停を行い，ゲーム離脱処理とルーム離脱処理を順序実行する
  */
-import { GameManager } from "@server/domains/game/GameManager";
-import { RoomManager } from "@server/domains/room/RoomManager";
+import type { DisconnectPlayerPort } from "@server/domains/game/application/ports/gameUseCasePorts";
+import type {
+  DisconnectRoomPort,
+  FindRoomByPlayerPort,
+} from "@server/domains/room/application/ports/roomUseCasePorts";
 import { handleGameDisconnect } from "@server/network/handlers/GameHandler";
 import { handleRoomDisconnect } from "@server/network/handlers/RoomHandler";
 
 type DisconnectCoordinatorParams = {
   io: Parameters<typeof handleGameDisconnect>[0];
   socketId: string;
-  gameManager: GameManager;
-  roomManager: RoomManager;
+  gameManager: DisconnectPlayerPort;
+  roomManager: DisconnectRoomPort & FindRoomByPlayerPort;
 };
 
 /** 切断時にゲーム処理とルーム処理を調停し，一貫した離脱処理を実行する */
diff --git a/apps/server/src/domains/room/application/ports/roomUseCasePorts.ts b/apps/server/src/domains/room/application/ports/roomUseCasePorts.ts
index defacee..c0e5a7b 100644
--- a/apps/server/src/domains/room/application/ports/roomUseCasePorts.ts
+++ b/apps/server/src/domains/room/application/ports/roomUseCasePorts.ts
@@ -25,3 +25,8 @@
 export interface DisconnectRoomPort {
   removePlayer(socketId: string): roomTypes.Room[];
 }
+
+/** 切断調停で利用するプレイヤー所属ルーム参照ポート */
+export interface FindRoomByPlayerPort {
+  getRoomByPlayerId(playerId: string): roomTypes.Room | undefined;
+}
diff --git a/apps/server/src/network/handlers/game/handleGameDisconnect.ts b/apps/server/src/network/handlers/game/handleGameDisconnect.ts
index 77af1c8..9cb11a0 100644
--- a/apps/server/src/network/handlers/game/handleGameDisconnect.ts
+++ b/apps/server/src/network/handlers/game/handleGameDisconnect.ts
@@ -3,14 +3,14 @@
  * ゲーム切断ユースケースを呼び出してプレイヤー離脱を配信する
  */
 import { Server } from "socket.io";
-import { GameManager } from "@server/domains/game/GameManager";
+import type { DisconnectPlayerPort } from "@server/domains/game/application/ports/gameUseCasePorts";
 import { disconnectUseCase } from "@server/domains/game/application/useCases/disconnectUseCase";
 import { createGameDisconnectOutputAdapter } from "./createGameOutputAdapter";
 
 /** 切断したプレイヤーをゲーム管理から除外し通知する */
 export const handleGameDisconnect = (
   io: Server,
-  gameManager: GameManager,
+  gameManager: DisconnectPlayerPort,
   roomId: string | undefined,
   playerId: string
 ) => {
diff --git a/apps/server/src/network/handlers/room/handleRoomDisconnect.ts b/apps/server/src/network/handlers/room/handleRoomDisconnect.ts
index 7c92990..213741b 100644
--- a/apps/server/src/network/handlers/room/handleRoomDisconnect.ts
+++ b/apps/server/src/network/handlers/room/handleRoomDisconnect.ts
@@ -3,7 +3,7 @@
  * ルーム切断ユースケースを呼び出してルーム状態更新を配信する
  */
 import { Server } from "socket.io";
-import { RoomManager } from "@server/domains/room/RoomManager";
+import type { DisconnectRoomPort } from "@server/domains/room/application/ports/roomUseCasePorts";
 import { roomDisconnectUseCase } from "@server/domains/room/application/useCases/roomDisconnectUseCase";
 import { createRoomDisconnectOutputAdapter } from "./createRoomOutputAdapter";
 
@@ -11,7 +11,7 @@
 export const handleRoomDisconnect = (
   io: Server,
   socketId: string,
-  roomManager: RoomManager
+  roomManager: DisconnectRoomPort
 ) => {
   const roomDisconnectOutputAdapter = createRoomDisconnectOutputAdapter(io);
 
diff --git a/apps/server/src/network/handlers/room/registerRoomHandlers.ts b/apps/server/src/network/handlers/room/registerRoomHandlers.ts
index d888b40..66b9d3f 100644
--- a/apps/server/src/network/handlers/room/registerRoomHandlers.ts
+++ b/apps/server/src/network/handlers/room/registerRoomHandlers.ts
@@ -3,7 +3,7 @@
  * ルーム参加イベントの受信ハンドラを登録する
  */
 import { Server, Socket } from "socket.io";
-import { RoomManager } from "@server/domains/room/RoomManager";
+import type { JoinRoomPort } from "@server/domains/room/application/ports/roomUseCasePorts";
 import { protocol } from "@repo/shared";
 import { joinRoomUseCase } from "@server/domains/room/application/useCases/joinRoomUseCase";
 import { createCommonHandlerContext } from "@server/network/handlers/CommonHandler";
@@ -15,7 +15,7 @@
 export const registerRoomHandlers = (
   io: Server,
   socket: Socket,
-  roomManager: RoomManager
+  roomManager: JoinRoomPort
 ) => {
   const common = createCommonHandlerContext(io, socket);
   const roomOutputAdapter = createRoomOutputAdapter(common);