diff --git a/apps/client/src/scenes/game/application/GameNetworkSync.ts b/apps/client/src/scenes/game/application/GameNetworkSync.ts
index ff8f650..fc29a67 100644
--- a/apps/client/src/scenes/game/application/GameNetworkSync.ts
+++ b/apps/client/src/scenes/game/application/GameNetworkSync.ts
@@ -17,6 +17,8 @@
 import { GameMapController } from "@client/scenes/game/entities/map/GameMapController";
 import type { GamePlayers } from "./game.types";
 
+const ENABLE_DEBUG_LOG = import.meta.env.DEV;
+
 type GameNetworkSyncOptions = {
   worldContainer: Container;
   players: GamePlayers;
@@ -36,6 +38,14 @@
   private onGameEnd: () => void;
   private isBound = false;
 
+  private debugLog = (message: string) => {
+    if (!ENABLE_DEBUG_LOG) {
+      return;
+    }
+
+    console.log(message);
+  };
+
   private handleCurrentPlayers = (serverPlayers: CurrentPlayersPayload) => {
     serverPlayers.forEach((p) => {
       const playerController = p.id === this.myId ? new LocalPlayerController(p) : new RemotePlayerController(p);
@@ -53,7 +63,7 @@
   private handleGameStart = (data: GameStartPayload) => {
     if (data && data.startTime) {
       this.onGameStart(data.startTime);
-      console.log(`[GameManager] ゲーム開始時刻同期完了: ${data.startTime}`);
+      this.debugLog(`[GameNetworkSync] ゲーム開始時刻同期完了: ${data.startTime}`);
     }
   };
 
diff --git a/apps/server/src/domains/game/application/services/GameRoomSession.ts b/apps/server/src/domains/game/application/services/GameRoomSession.ts
index 02847cb..75d1b06 100644
--- a/apps/server/src/domains/game/application/services/GameRoomSession.ts
+++ b/apps/server/src/domains/game/application/services/GameRoomSession.ts
@@ -18,8 +18,6 @@
   setPlayerPosition,
 } from "../../entities/player/playerMovement.js";
 import { buildGameResultPayload } from "./gameResultCalculator.js";
-
-// 💡 追加: チーム割り当てサービスをインポート
 import { TeamAssignmentService } from "../services/TeamAssignmentService.js";
 
 /** ルーム単位のゲーム状態とループ進行を保持するセッションクラス */
@@ -37,12 +35,12 @@
     this.mapStore = new MapStore();
 
     playerIds.forEach((playerId) => {
-      // 💡 追加: 現在の this.players (生成済みのプレイヤー達) を見て、一番人数の少ないチームを算出する
+      // 現在のプレイヤー構成から人数が最も少ないチームを算出する
       const assignedTeamId = TeamAssignmentService.getBalancedTeamId(
         this.players,
       );
 
-      // 💡 修正: バランス良く割り当てられたチームIDを渡してプレイヤーを生成する
+      // 算出したチームIDを指定してプレイヤーを生成する
       const player = createSpawnedPlayer(playerId, assignedTeamId);
 
       this.players.set(playerId, player);