diff --git a/apps/client/src/scenes/game/application/GameLoop.ts b/apps/client/src/scenes/game/application/GameLoop.ts
index 4fc4139..6a67d2e 100644
--- a/apps/client/src/scenes/game/application/GameLoop.ts
+++ b/apps/client/src/scenes/game/application/GameLoop.ts
@@ -6,9 +6,9 @@
 import { Application, Container, Ticker } from "pixi.js";
 import { config } from "@client/config";
 import { LocalPlayerController } from "@client/scenes/game/entities/player/PlayerController";
+import { PlayerRepository } from "@client/scenes/game/entities/player/PlayerRepository";
 import { BombManager } from "@client/scenes/game/entities/bomb/BombManager";
 import type { GamePlayers } from "./game.types";
-import { PlayerRepository } from "./player/PlayerRepository";
 import { InputStep } from "./loopSteps/InputStep";
 import { SimulationStep } from "./loopSteps/SimulationStep";
 import { CameraStep } from "./loopSteps/CameraStep";
diff --git a/apps/client/src/scenes/game/application/GameNetworkSync.ts b/apps/client/src/scenes/game/application/GameNetworkSync.ts
index bc3318f..22f35d8 100644
--- a/apps/client/src/scenes/game/application/GameNetworkSync.ts
+++ b/apps/client/src/scenes/game/application/GameNetworkSync.ts
@@ -22,7 +22,7 @@
   toRemoteBombPlacedPayload,
   toRemotePlayerDeadPayload,
 } from "./network/adapters/GameNetworkEventAdapter";
-import { PlayerRepository } from "./player/PlayerRepository";
+import { PlayerRepository } from "@client/scenes/game/entities/player/PlayerRepository";
 import { PlayerSyncHandler } from "./network/handlers/PlayerSyncHandler";
 import { MapSyncHandler } from "./network/handlers/MapSyncHandler";
 import { CombatSyncHandler } from "./network/handlers/CombatSyncHandler";
diff --git a/apps/client/src/scenes/game/application/loopSteps/LoopStep.ts b/apps/client/src/scenes/game/application/loopSteps/LoopStep.ts
index 2e3c883..ac8d393 100644
--- a/apps/client/src/scenes/game/application/loopSteps/LoopStep.ts
+++ b/apps/client/src/scenes/game/application/loopSteps/LoopStep.ts
@@ -5,7 +5,7 @@
  */
 import type { Application, Container } from "pixi.js";
 import type { LocalPlayerController } from "@client/scenes/game/entities/player/PlayerController";
-import type { PlayerRepository } from "@client/scenes/game/application/player/PlayerRepository";
+import type { PlayerRepository } from "@client/scenes/game/entities/player/PlayerRepository";
 
 /** 1フレーム分の更新文脈を表す型 */
 export type LoopFrameContext = {
diff --git a/apps/client/src/scenes/game/application/loopSteps/SimulationStep.ts b/apps/client/src/scenes/game/application/loopSteps/SimulationStep.ts
index 59beed9..e34a162 100644
--- a/apps/client/src/scenes/game/application/loopSteps/SimulationStep.ts
+++ b/apps/client/src/scenes/game/application/loopSteps/SimulationStep.ts
@@ -5,8 +5,8 @@
  */
 import { config } from "@client/config";
 import { LocalPlayerController, RemotePlayerController } from "@client/scenes/game/entities/player/PlayerController";
+import type { PlayerRepository } from "@client/scenes/game/entities/player/PlayerRepository";
 import type { MoveSender } from "@client/scenes/game/application/network/PlayerMoveSender";
-import type { PlayerRepository } from "../player/PlayerRepository";
 import type { LoopFrameContext, LoopStep } from "./LoopStep";
 
 /** SimulationStep の初期化入力 */
diff --git a/apps/client/src/scenes/game/application/player/PlayerRepository.ts b/apps/client/src/scenes/game/application/player/PlayerRepository.ts
index cb51025..19466a2 100644
--- a/apps/client/src/scenes/game/application/player/PlayerRepository.ts
+++ b/apps/client/src/scenes/game/application/player/PlayerRepository.ts
@@ -1,49 +1,8 @@
 /**
  * PlayerRepository
- * プレイヤー集合の更新窓口を提供する
- * 参照と更新を集約して副作用の追跡を容易にする
+ * entities層のPlayerRepositoryを段階移行のため再公開する
+ * 既存import互換を維持して移行コストを抑える
  */
-import type {
-  GamePlayerController,
-  GamePlayers,
-} from "@client/scenes/game/application/game.types";
 
-/** プレイヤー集合の更新と参照を管理するリポジトリ */
-export class PlayerRepository {
-  private readonly players: GamePlayers;
-
-  constructor(players: GamePlayers = {}) {
-    this.players = players;
-  }
-
-  /** プレイヤーIDでコントローラーを取得する */
-  public getById(playerId: string): GamePlayerController | undefined {
-    return this.players[playerId];
-  }
-
-  /** プレイヤーを追加または更新する */
-  public upsert(playerId: string, controller: GamePlayerController): void {
-    this.players[playerId] = controller;
-  }
-
-  /** プレイヤーを削除して削除対象を返す */
-  public remove(playerId: string): GamePlayerController | undefined {
-    const target = this.players[playerId];
-    if (!target) {
-      return undefined;
-    }
-
-    delete this.players[playerId];
-    return target;
-  }
-
-  /** 管理中プレイヤー配列を返す */
-  public values(): GamePlayerController[] {
-    return Object.values(this.players);
-  }
-
-  /** 内部で保持するプレイヤー集合を返す */
-  public toRecord(): GamePlayers {
-    return this.players;
-  }
-}
\ No newline at end of file
+/** entities層のPlayerRepositoryを互換再エクスポートする */
+export { PlayerRepository } from "@client/scenes/game/entities/player/PlayerRepository";
\ No newline at end of file
diff --git a/apps/client/src/scenes/game/application/presentation/GameUiPresenter.ts b/apps/client/src/scenes/game/application/presentation/GameUiPresenter.ts
deleted file mode 100644
index b9b8cec..0000000
--- a/apps/client/src/scenes/game/application/presentation/GameUiPresenter.ts
+++ /dev/null
@@ -1,25 +0,0 @@
-/**
- * GameUiPresenter
- * ゲーム画面の表示用データ変換を提供する
- * 残り時間と開始カウントダウンの表示生成を扱う
- */
-import { config } from "@client/config";
-
-/** 残り秒数を mm:ss 形式へ変換する */
-export const formatRemainingTime = (remainingSec: number): string => {
-  const mins = Math.floor(remainingSec / 60);
-  const secs = Math.floor(remainingSec % 60);
-  return `${mins}:${secs.toString().padStart(2, "0")}`;
-};
-
-/** 開始カウントダウン表示文字列を生成する */
-export const buildStartCountdownText = (
-  remainingSec: number,
-): string | null => {
-  return remainingSec > 0 ? String(remainingSec) : null;
-};
-
-/** ゲーム画面の初期残り時間表示を返す */
-export const getInitialTimeDisplay = (): string => {
-  return formatRemainingTime(config.GAME_CONFIG.GAME_DURATION_SEC);
-};
\ No newline at end of file
diff --git a/apps/client/src/scenes/game/entities/player/PlayerRepository.ts b/apps/client/src/scenes/game/entities/player/PlayerRepository.ts
new file mode 100644
index 0000000..cb51025
--- /dev/null
+++ b/apps/client/src/scenes/game/entities/player/PlayerRepository.ts
@@ -0,0 +1,49 @@
+/**
+ * PlayerRepository
+ * プレイヤー集合の更新窓口を提供する
+ * 参照と更新を集約して副作用の追跡を容易にする
+ */
+import type {
+  GamePlayerController,
+  GamePlayers,
+} from "@client/scenes/game/application/game.types";
+
+/** プレイヤー集合の更新と参照を管理するリポジトリ */
+export class PlayerRepository {
+  private readonly players: GamePlayers;
+
+  constructor(players: GamePlayers = {}) {
+    this.players = players;
+  }
+
+  /** プレイヤーIDでコントローラーを取得する */
+  public getById(playerId: string): GamePlayerController | undefined {
+    return this.players[playerId];
+  }
+
+  /** プレイヤーを追加または更新する */
+  public upsert(playerId: string, controller: GamePlayerController): void {
+    this.players[playerId] = controller;
+  }
+
+  /** プレイヤーを削除して削除対象を返す */
+  public remove(playerId: string): GamePlayerController | undefined {
+    const target = this.players[playerId];
+    if (!target) {
+      return undefined;
+    }
+
+    delete this.players[playerId];
+    return target;
+  }
+
+  /** 管理中プレイヤー配列を返す */
+  public values(): GamePlayerController[] {
+    return Object.values(this.players);
+  }
+
+  /** 内部で保持するプレイヤー集合を返す */
+  public toRecord(): GamePlayers {
+    return this.players;
+  }
+}
\ No newline at end of file
diff --git a/apps/client/src/scenes/game/hooks/useGameSceneController.ts b/apps/client/src/scenes/game/hooks/useGameSceneController.ts
index 4a1ff5b..079c232 100644
--- a/apps/client/src/scenes/game/hooks/useGameSceneController.ts
+++ b/apps/client/src/scenes/game/hooks/useGameSceneController.ts
@@ -9,7 +9,7 @@
   buildStartCountdownText,
   formatRemainingTime,
   getInitialTimeDisplay,
-} from "@client/scenes/game/application/presentation/GameUiPresenter";
+} from "@client/scenes/game/input/presentation/GameUiPresenter";
 
 /** 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) => {
diff --git a/apps/client/src/scenes/game/input/presentation/GameUiPresenter.ts b/apps/client/src/scenes/game/input/presentation/GameUiPresenter.ts
new file mode 100644
index 0000000..b9b8cec
--- /dev/null
+++ b/apps/client/src/scenes/game/input/presentation/GameUiPresenter.ts
@@ -0,0 +1,25 @@
+/**
+ * GameUiPresenter
+ * ゲーム画面の表示用データ変換を提供する
+ * 残り時間と開始カウントダウンの表示生成を扱う
+ */
+import { config } from "@client/config";
+
+/** 残り秒数を mm:ss 形式へ変換する */
+export const formatRemainingTime = (remainingSec: number): string => {
+  const mins = Math.floor(remainingSec / 60);
+  const secs = Math.floor(remainingSec % 60);
+  return `${mins}:${secs.toString().padStart(2, "0")}`;
+};
+
+/** 開始カウントダウン表示文字列を生成する */
+export const buildStartCountdownText = (
+  remainingSec: number,
+): string | null => {
+  return remainingSec > 0 ? String(remainingSec) : null;
+};
+
+/** ゲーム画面の初期残り時間表示を返す */
+export const getInitialTimeDisplay = (): string => {
+  return formatRemainingTime(config.GAME_CONFIG.GAME_DURATION_SEC);
+};
\ No newline at end of file