diff --git a/apps/client/src/scenes/game/GameManager.ts b/apps/client/src/scenes/game/GameManager.ts
index 1ca9fbe..5ee9da1 100644
--- a/apps/client/src/scenes/game/GameManager.ts
+++ b/apps/client/src/scenes/game/GameManager.ts
@@ -1,3 +1,8 @@
+/**
+ * GameManager
+ * ゲーム全体の初期化，更新，破棄のライフサイクルを管理する
+ * マップ，ネットワーク同期，ゲームループを統合する
+ */
 import { Application, Container, Ticker } from "pixi.js";
 import { socketManager } from "@client/network/SocketManager";
 import { GameMapController } from "./entities/map/GameMapController";
@@ -6,6 +11,7 @@
 import { GameLoop } from "./application/GameLoop";
 import type { GamePlayers } from "./application/game.types";
 
+/** ゲームシーンの実行ライフサイクルを管理するマネージャー */
 export class GameManager {
   private app: Application;
   private worldContainer: Container;
diff --git a/apps/client/src/scenes/game/GameScene.tsx b/apps/client/src/scenes/game/GameScene.tsx
index e7432ba..0beeaa6 100644
--- a/apps/client/src/scenes/game/GameScene.tsx
+++ b/apps/client/src/scenes/game/GameScene.tsx
@@ -11,10 +11,7 @@
   myId: string | null;
 }
 
-/**
- * メインゲーム画面コンポーネント
- * UIの描画と GameManager への入力伝達のみを担当する
- */
+/** メインゲーム画面を描画し入力をゲーム制御へ橋渡しする */
 export function GameScene({ myId }: GameSceneProps) {
   const { pixiContainerRef, timeLeft, handleInput } = useGameSceneController(myId);
 
diff --git a/apps/client/src/scenes/game/application/GameLoop.ts b/apps/client/src/scenes/game/application/GameLoop.ts
index f9145b5..3b76a2c 100644
--- a/apps/client/src/scenes/game/application/GameLoop.ts
+++ b/apps/client/src/scenes/game/application/GameLoop.ts
@@ -1,3 +1,8 @@
+/**
+ * GameLoop
+ * 毎フレームの入力，シミュレーション，カメラ更新を進行する
+ * 各 Step を呼び出して更新順序を統制する
+ */
 import { Application, Container, Ticker } from "pixi.js";
 import { LocalPlayerController } from "../entities/player/PlayerController";
 import type { GamePlayers } from "./game.types";
@@ -13,6 +18,7 @@
   getJoystickInput: () => { x: number; y: number };
 };
 
+/** ゲームのフレーム更新順序を管理するループ制御クラス */
 export class GameLoop {
   private app: Application;
   private worldContainer: Container;
diff --git a/apps/client/src/scenes/game/application/GameNetworkSync.ts b/apps/client/src/scenes/game/application/GameNetworkSync.ts
index f401c1c..9146949 100644
--- a/apps/client/src/scenes/game/application/GameNetworkSync.ts
+++ b/apps/client/src/scenes/game/application/GameNetworkSync.ts
@@ -1,3 +1,8 @@
+/**
+ * GameNetworkSync
+ * ソケットイベントとゲーム内状態更新の同期を担う
+ * プレイヤー生成更新削除とマップ更新購読を管理する
+ */
 import { Container } from "pixi.js";
 import type { playerTypes } from "@repo/shared";
 import { socketManager } from "@client/network/SocketManager";
@@ -13,6 +18,7 @@
   onGameStart: (startTime: number) => void;
 };
 
+/** ゲーム中のネットワークイベント購読と同期処理を管理する */
 export class GameNetworkSync {
   private worldContainer: Container;
   private players: GamePlayers;
diff --git a/apps/client/src/scenes/game/application/GameTimer.ts b/apps/client/src/scenes/game/application/GameTimer.ts
index 61a6148..b3fed35 100644
--- a/apps/client/src/scenes/game/application/GameTimer.ts
+++ b/apps/client/src/scenes/game/application/GameTimer.ts
@@ -1,5 +1,11 @@
+/**
+ * GameTimer
+ * ゲーム開始時刻を基準に残り時間を計算する
+ * 表示用の残り秒数取得を提供する
+ */
 import { config } from "@repo/shared";
 
+/** ゲーム制限時間の残り秒数を管理するタイマーモデル */
 export class GameTimer {
   private gameStartTime: number | null = null;
 
diff --git a/apps/client/src/scenes/game/application/game.types.ts b/apps/client/src/scenes/game/application/game.types.ts
index f008fdd..cb69775 100644
--- a/apps/client/src/scenes/game/application/game.types.ts
+++ b/apps/client/src/scenes/game/application/game.types.ts
@@ -1,4 +1,11 @@
+/**
+ * game.types
+ * ゲームアプリケーション層で共有する型定義をまとめる
+ * プレイヤーコントローラーの集合表現を提供する
+ */
 import { LocalPlayerController, RemotePlayerController } from "../entities/player/PlayerController";
 
+/** ゲームで扱うプレイヤーコントローラーのユニオン型 */
 export type GamePlayerController = LocalPlayerController | RemotePlayerController;
+/** プレイヤーIDをキーにしたコントローラー管理マップ型 */
 export type GamePlayers = Record<string, GamePlayerController>;
diff --git a/apps/client/src/scenes/game/application/loopSteps/CameraStep.ts b/apps/client/src/scenes/game/application/loopSteps/CameraStep.ts
index 4871923..93dda17 100644
--- a/apps/client/src/scenes/game/application/loopSteps/CameraStep.ts
+++ b/apps/client/src/scenes/game/application/loopSteps/CameraStep.ts
@@ -1,3 +1,8 @@
+/**
+ * CameraStep
+ * ゲームループのカメラ段を担う
+ * ローカルプレイヤー位置に応じてワールド座標を更新する
+ */
 import { Application, Container } from "pixi.js";
 import { LocalPlayerController } from "../../entities/player/PlayerController";
 
@@ -7,6 +12,7 @@
   me: LocalPlayerController;
 };
 
+/** カメラ追従更新を担うステップ */
 export class CameraStep {
   public run({ app, worldContainer, me }: CameraStepParams) {
     const meDisplay = me.getDisplayObject();
diff --git a/apps/client/src/scenes/game/application/loopSteps/InputStep.ts b/apps/client/src/scenes/game/application/loopSteps/InputStep.ts
index 6ca5551..721586b 100644
--- a/apps/client/src/scenes/game/application/loopSteps/InputStep.ts
+++ b/apps/client/src/scenes/game/application/loopSteps/InputStep.ts
@@ -1,3 +1,8 @@
+/**
+ * InputStep
+ * ゲームループの入力段を担う
+ * ジョイスティック入力をローカルプレイヤーへ適用する
+ */
 import { LocalPlayerController } from "../../entities/player/PlayerController";
 
 type InputStepOptions = {
@@ -13,6 +18,7 @@
   isMoving: boolean;
 };
 
+/** 入力段の更新処理を担うステップ */
 export class InputStep {
   private getJoystickInput: () => { x: number; y: number };
 
diff --git a/apps/client/src/scenes/game/application/loopSteps/SimulationStep.ts b/apps/client/src/scenes/game/application/loopSteps/SimulationStep.ts
index adcdc27..83b74e1 100644
--- a/apps/client/src/scenes/game/application/loopSteps/SimulationStep.ts
+++ b/apps/client/src/scenes/game/application/loopSteps/SimulationStep.ts
@@ -1,3 +1,8 @@
+/**
+ * SimulationStep
+ * ゲームループのシミュレーション段を担う
+ * ローカル更新とリモート補間更新を順に実行する
+ */
 import { config } from "@repo/shared";
 import { socketManager } from "@client/network/SocketManager";
 import { LocalPlayerController, RemotePlayerController } from "../../entities/player/PlayerController";
@@ -10,11 +15,17 @@
   isMoving: boolean;
 };
 
+/** シミュレーション段の更新処理を担うステップ */
 export class SimulationStep {
   private lastPositionSentTime = 0;
   private wasMoving = false;
 
   public run({ me, players, deltaSeconds, isMoving }: SimulationStepParams) {
+    this.runLocalSimulation({ me, isMoving });
+    this.runRemoteSimulation({ players, deltaSeconds });
+  }
+
+  private runLocalSimulation({ me, isMoving }: Pick<SimulationStepParams, "me" | "isMoving">) {
     if (isMoving) {
       me.tick();
 
@@ -33,7 +44,9 @@
     }
 
     this.wasMoving = isMoving;
+  }
 
+  private runRemoteSimulation({ players, deltaSeconds }: Pick<SimulationStepParams, "players" | "deltaSeconds">) {
     Object.values(players).forEach((player) => {
       if (player instanceof RemotePlayerController) {
         player.tick(deltaSeconds);
diff --git a/apps/client/src/scenes/game/entities/player/PlayerModel.ts b/apps/client/src/scenes/game/entities/player/PlayerModel.ts
index f6c1612..d42e4c8 100644
--- a/apps/client/src/scenes/game/entities/player/PlayerModel.ts
+++ b/apps/client/src/scenes/game/entities/player/PlayerModel.ts
@@ -6,9 +6,7 @@
 import { config } from '@repo/shared';
 import type { playerTypes } from '@repo/shared';
 
-/**
- * プレイヤーの計算責務を担うモデル
- */
+/** プレイヤーの座標計算と補間計算を管理するモデル */
 export class PlayerModel {
   public readonly id: string;
   public readonly teamId: number;
diff --git a/apps/client/src/scenes/game/entities/player/PlayerView.ts b/apps/client/src/scenes/game/entities/player/PlayerView.ts
index 5adbb1d..902efdb 100644
--- a/apps/client/src/scenes/game/entities/player/PlayerView.ts
+++ b/apps/client/src/scenes/game/entities/player/PlayerView.ts
@@ -6,9 +6,7 @@
 import { Graphics } from 'pixi.js';
 import { config } from '@repo/shared';
 
-/**
- * プレイヤーの描画責務を担うビュー
- */
+/** プレイヤーのPixi描画オブジェクトを管理するビュー */
 export class PlayerView {
   public readonly displayObject: Graphics;
 
diff --git a/apps/client/src/scenes/game/hooks/useGameSceneController.ts b/apps/client/src/scenes/game/hooks/useGameSceneController.ts
index a688a92..61ccda3 100644
--- a/apps/client/src/scenes/game/hooks/useGameSceneController.ts
+++ b/apps/client/src/scenes/game/hooks/useGameSceneController.ts
@@ -1,3 +1,8 @@
+/**
+ * useGameSceneController
+ * ゲーム画面の状態管理と GameManager 連携を担うフック
+ * Pixi描画領域，残り時間表示，入力橋渡しを提供する
+ */
 import { useCallback, useEffect, useRef, useState } from "react";
 import { config } from "@repo/shared";
 import { GameInputManager } from "../GameInputManager";
@@ -11,6 +16,7 @@
 
 const getInitialTimeDisplay = () => formatRemainingTime(config.GAME_CONFIG.GAME_DURATION_SEC);
 
+/** ゲーム画面の状態と入力ハンドラを提供するフック */
 export const useGameSceneController = (myId: string | null) => {
   const pixiContainerRef = useRef<HTMLDivElement>(null);
   const gameManagerRef = useRef<GameManager | null>(null);