diff --git a/apps/server/src/domains/game/application/useCases/disconnectUseCase.ts b/apps/server/src/domains/game/application/useCases/disconnectUseCase.ts
index ce9ce89..49d886c 100644
--- a/apps/server/src/domains/game/application/useCases/disconnectUseCase.ts
+++ b/apps/server/src/domains/game/application/useCases/disconnectUseCase.ts
@@ -2,17 +2,17 @@
 import { logEvent } from "@server/logging/logEvent";
 
 type DisconnectUseCaseParams = {
-  gameManager: DisconnectPlayerPort;
+  gameSessionManager: DisconnectPlayerPort;
   playerId: string;
   publishPlayerRemoved: (playerId: string) => void;
 };
 
 export const disconnectUseCase = ({
-  gameManager,
+  gameSessionManager,
   playerId,
   publishPlayerRemoved,
 }: DisconnectUseCaseParams) => {
-  gameManager.removePlayer(playerId);
+  gameSessionManager.removePlayer(playerId);
   publishPlayerRemoved(playerId);
   logEvent("GameUseCase", {
     event: "DISCONNECT",
diff --git a/apps/server/src/domains/game/application/useCases/movePlayerUseCase.ts b/apps/server/src/domains/game/application/useCases/movePlayerUseCase.ts
index 9bcece1..029f15d 100644
--- a/apps/server/src/domains/game/application/useCases/movePlayerUseCase.ts
+++ b/apps/server/src/domains/game/application/useCases/movePlayerUseCase.ts
@@ -2,15 +2,15 @@
 import type { MovePlayerPort } from "../ports/gameUseCasePorts";
 
 type MovePlayerUseCaseParams = {
-  gameManager: MovePlayerPort;
+  gameSessionManager: MovePlayerPort;
   playerId: string;
   move: playerTypes.MovePayload;
 };
 
 export const movePlayerUseCase = ({
-  gameManager,
+  gameSessionManager,
   playerId,
   move,
 }: MovePlayerUseCaseParams) => {
-  gameManager.movePlayer(playerId, move.x, move.y);
+  gameSessionManager.movePlayer(playerId, move.x, move.y);
 };
diff --git a/apps/server/src/domains/game/application/useCases/readyForGameUseCase.ts b/apps/server/src/domains/game/application/useCases/readyForGameUseCase.ts
index 067a1e2..21dd04e 100644
--- a/apps/server/src/domains/game/application/useCases/readyForGameUseCase.ts
+++ b/apps/server/src/domains/game/application/useCases/readyForGameUseCase.ts
@@ -5,7 +5,7 @@
 type ReadyForGameUseCaseParams = {
   socketId: string;
   roomId?: string;
-  gameManager: ReadyForGamePort;
+  gameSessionManager: ReadyForGamePort;
   publishCurrentPlayers: (players: playerTypes.PlayerData[]) => void;
   publishGameStart: (payload: { startTime: number }) => void;
 };
@@ -13,7 +13,7 @@
 export const readyForGameUseCase = ({
   socketId,
   roomId,
-  gameManager,
+  gameSessionManager,
   publishCurrentPlayers,
   publishGameStart,
 }: ReadyForGameUseCaseParams) => {
@@ -27,7 +27,7 @@
     return;
   }
 
-  const roomPlayers = gameManager.getRoomPlayers(roomId);
+  const roomPlayers = gameSessionManager.getRoomPlayers(roomId);
   publishCurrentPlayers(roomPlayers);
 
   logEvent("GameUseCase", {
@@ -38,7 +38,7 @@
     totalPlayers: roomPlayers.length,
   });
 
-  const startTime = gameManager.getRoomStartTime(roomId);
+  const startTime = gameSessionManager.getRoomStartTime(roomId);
   if (!startTime) {
     return;
   }
diff --git a/apps/server/src/domains/game/application/useCases/startGameUseCase.ts b/apps/server/src/domains/game/application/useCases/startGameUseCase.ts
index b8991db..cc449c9 100644
--- a/apps/server/src/domains/game/application/useCases/startGameUseCase.ts
+++ b/apps/server/src/domains/game/application/useCases/startGameUseCase.ts
@@ -6,7 +6,7 @@
 
 type StartGameUseCaseParams = {
   ownerId: string;
-  gameManager: StartGamePort;
+  gameSessionManager: StartGamePort;
   roomManager: RoomManager;
   publishUpdatePlayer: (roomId: string, playerData: playerTypes.PlayerData) => void;
   publishMapCellUpdates: (roomId: string, cellUpdates: gridMapTypes.CellUpdate[]) => void;
@@ -16,7 +16,7 @@
 
 export const startGameUseCase = ({
   ownerId,
-  gameManager,
+  gameSessionManager,
   roomManager,
   publishUpdatePlayer,
   publishMapCellUpdates,
@@ -55,7 +55,7 @@
 
   const playerIds = room.players.map((p: { id: string }) => p.id);
 
-  gameManager.startRoomSession(
+  gameSessionManager.startRoomSession(
     room.roomId,
     playerIds,
     (tickData) => {
@@ -79,6 +79,6 @@
     }
   );
 
-  const startTime = gameManager.getRoomStartTime(room.roomId) || Date.now();
+  const startTime = gameSessionManager.getRoomStartTime(room.roomId) || Date.now();
   publishGameStart(room.roomId, { startTime });
 };
diff --git a/apps/server/src/network/SocketManager.ts b/apps/server/src/network/SocketManager.ts
index f986526..d34a3f3 100644
--- a/apps/server/src/network/SocketManager.ts
+++ b/apps/server/src/network/SocketManager.ts
@@ -10,12 +10,12 @@
 /** Socket.IOの接続ハンドラ登録を統括する */
 export class SocketManager {
   private io: Server;
-  private gameManager: GameSessionManager;
+  private gameSessionManager: GameSessionManager;
   private roomManager: RoomManager;
 
-  constructor(io: Server, gameManager: GameSessionManager, roomManager: RoomManager) {
+  constructor(io: Server, gameSessionManager: GameSessionManager, roomManager: RoomManager) {
     this.io = io;
-    this.gameManager = gameManager;
+    this.gameSessionManager = gameSessionManager;
     this.roomManager = roomManager;
   }
 
@@ -23,7 +23,7 @@
     // 接続時に必要な各ドメインハンドラを登録する
     registerConnectionHandlers({
       io: this.io,
-      gameManager: this.gameManager,
+      gameSessionManager: this.gameSessionManager,
       roomManager: this.roomManager,
     });
   }
diff --git a/apps/server/src/network/bootstrap/boot.ts b/apps/server/src/network/bootstrap/boot.ts
index 59005a9..4f2073e 100644
--- a/apps/server/src/network/bootstrap/boot.ts
+++ b/apps/server/src/network/bootstrap/boot.ts
@@ -12,9 +12,9 @@
 export const boot = (httpServer: HttpServer) => {
   // ネットワーク層とドメイン層の依存を構築する
   const io = createIo(httpServer);
-  const gameManager = new GameSessionManager();
+  const gameSessionManager = new GameSessionManager();
   const roomManager = new RoomManager();
-  const socketManager = new SocketManager(io, gameManager, roomManager);
+  const socketManager = new SocketManager(io, gameSessionManager, roomManager);
 
   socketManager.initialize();
 };
diff --git a/apps/server/src/network/handlers/game/handleGameDisconnect.ts b/apps/server/src/network/handlers/game/handleGameDisconnect.ts
index 6a25232..7ff1db5 100644
--- a/apps/server/src/network/handlers/game/handleGameDisconnect.ts
+++ b/apps/server/src/network/handlers/game/handleGameDisconnect.ts
@@ -10,14 +10,14 @@
 /** 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: GameSessionManager,
+  gameSessionManager: GameSessionManager,
   roomId: string | undefined,
   playerId: string
 ) => {
   const gameDisconnectPublisher = createGameDisconnectPublisher(io);
 
   disconnectUseCase({
-    gameManager,
+    gameSessionManager,
     playerId,
     publishPlayerRemoved: (removedPlayerId) => {
       if (!roomId) {
diff --git a/apps/server/src/network/handlers/game/registerGameHandlers.ts b/apps/server/src/network/handlers/game/registerGameHandlers.ts
index 4e2f2c3..a41a172 100644
--- a/apps/server/src/network/handlers/game/registerGameHandlers.ts
+++ b/apps/server/src/network/handlers/game/registerGameHandlers.ts
@@ -20,7 +20,7 @@
 export const registerGameHandlers = (
   io: Server,
   socket: Socket,
-  gameManager: GameSessionManager,
+  gameSessionManager: GameSessionManager,
   roomManager: RoomManager
 ) => {
   const common = createCommonHandlerContext(io, socket);
@@ -47,7 +47,7 @@
   socket.on(protocol.SocketEvents.START_GAME, () => {
     startGameUseCase({
       ownerId: socket.id,
-      gameManager,
+      gameSessionManager,
       roomManager,
       publishUpdatePlayer: gamePublisher.publishUpdatePlayerToRoom,
       publishMapCellUpdates: gamePublisher.publishMapCellUpdatesToRoom,
@@ -63,7 +63,7 @@
     readyForGameUseCase({
       socketId: socket.id,
       roomId,
-      gameManager,
+      gameSessionManager,
       publishCurrentPlayers: gamePublisher.publishCurrentPlayersToSocket,
       publishGameStart: gamePublisher.publishGameStartToSocket,
     });
@@ -81,7 +81,7 @@
     }
 
     movePlayerUseCase({
-      gameManager,
+      gameSessionManager,
       playerId: socket.id,
       move: data,
     });
diff --git a/apps/server/src/network/handlers/registerConnectionHandlers.ts b/apps/server/src/network/handlers/registerConnectionHandlers.ts
index a64fd5b..9496105 100644
--- a/apps/server/src/network/handlers/registerConnectionHandlers.ts
+++ b/apps/server/src/network/handlers/registerConnectionHandlers.ts
@@ -12,14 +12,14 @@
 
 type RegisterConnectionHandlersParams = {
   io: Server;
-  gameManager: GameSessionManager;
+  gameSessionManager: GameSessionManager;
   roomManager: RoomManager;
 };
 
 /** ソケット接続と切断イベントに対する共通ハンドラを登録する */
 export const registerConnectionHandlers = ({
   io,
-  gameManager,
+  gameSessionManager,
   roomManager,
 }: RegisterConnectionHandlersParams) => {
   io.on(protocol.SocketEvents.CONNECT, (socket: Socket) => {
@@ -31,7 +31,7 @@
     });
 
     registerRoomHandlers(io, socket, roomManager);
-    registerGameHandlers(io, socket, gameManager, roomManager);
+    registerGameHandlers(io, socket, gameSessionManager, 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
@@ -43,7 +43,7 @@
 
       const roomId = roomManager.getRoomByPlayerId(socket.id)?.roomId;
 
-      handleGameDisconnect(io, gameManager, roomId, socket.id);
+      handleGameDisconnect(io, gameSessionManager, roomId, socket.id);
       handleRoomDisconnect(io, socket, roomManager);
     });
   });