diff --git a/packages/Models/Othello/Othello/Othello.php b/packages/Models/Othello/Othello/Othello.php
index bbb2d55..d707622 100644
--- a/packages/Models/Othello/Othello/Othello.php
+++ b/packages/Models/Othello/Othello/Othello.php
@@ -9,46 +9,61 @@
 
 class Othello
 {
-    // スキップの連続を許容する回数
-    const MAX_CONTINUOUS_SKIP_COUNT = 1;
-
     private function __construct(
         public readonly string $id,
+        private Status $status,
         private Turn $turn,
-        private int $skipCount
-    ) {}
+    ) {
+        if (!Str::isUuid($id)) throw new DomainException();
+    }
 
     public static function init(): Othello
     {
         return new self(
-            id:         Str::uuid(),
-            turn:       Turn::init(),
-            skipCount:  0,
+            id:     Str::uuid(),
+            status: Status::PLAYING,
+            turn:   Turn::init(),
         );
     }
 
-    public static function make(string $id, Turn $turn, int $skipCount): self
+    public static function make(string $id, Status $status, Turn $turn): self
     {
         return new self(
-            id:        $id,
-            turn:      $turn,
-            skipCount: $skipCount,
+            id:     $id,
+            status: $status,
+            turn:   $turn,
         );
     }
 
     /**
      * ゲームの状態更新
-     * 連続スキップ数：スキップ時+1。スキップしない場合は0にリセット
      */
     public function apply(Action $action): void
     {
-        // ゲームが終了している場合
-        if ($this->isOver()) throw new DomainException();
+        // プレー中ではない場合
+        if ($this->status !== Status::PLAYING) throw new DomainException();
 
+        $turnBefore = $this->turn;
+        // ターンを更新する
         $this->turn = match ($action->actionType) {
             ActionType::SET_STONE => $this->turn->advance($action->data),
             ActionType::CONFIRM_SKIP => $this->turn->skip(),
         };
+
+        $this->status = $this->nextStatus($turnBefore, $this->turn);
+    }
+
+    private function nextStatus(Turn $turnBefore, Turn $turnAfter): Status
+    {
+        if ($turnAfter->isLast()) return $this->status = Status::RESULTED;
+        if (self::mustInterrupt($turnBefore, $turnAfter)) return $this->status = Status::INTERRUPTED;
+
+        return Status::PLAYING;
+    }
+
+    private static function mustInterrupt(Turn $turnBefore, Turn $turnAfter)
+    {
+        return $turnBefore->mustSkip() && $turnAfter->mustSkip();
     }
 
     /**
@@ -60,23 +75,23 @@ public function apply(Action $action): void
     public function isOver(): bool
     {
         // ターンが進行不可(正常系)、もしくはスキップが連続してどちらも置く場所がなくなった(異常系)場合、終了
-        $isInvalidSkipCount = $this->skipCount > self::MAX_CONTINUOUS_SKIP_COUNT;
-        return !$this->turn->isAdvanceable() || $isInvalidSkipCount;
+        return !$this->turn->isLast();
     }
 
     /**
-     * @return Turn
+     * @return Status
      */
-    public function getTurn(): Turn
+    public function getStatus(): Status
     {
-        return $this->turn;
+        return $this->status;
     }
 
     /**
-     * @return int
+     * @return Turn
      */
-    public function getSkipCount(): int
+    public function getTurn(): Turn
     {
-        return $this->skipCount;
+        return $this->turn;
     }
+
 }
diff --git a/packages/Models/Othello/Othello/Status.php b/packages/Models/Othello/Othello/Status.php
new file mode 100644
index 0000000..82ba28d
--- /dev/null
+++ b/packages/Models/Othello/Othello/Status.php
@@ -0,0 +1,10 @@
+<?php
+
+namespace Packages\Models\Othello\Othello;
+
+enum Status
+{
+    case PLAYING; // プレー中
+    case RESULTED; // 決着(引き分け含む)
+    case INTERRUPTED; // (強制終了)
+}
diff --git a/packages/Models/Othello/Othello/Turn.php b/packages/Models/Othello/Othello/Turn.php
index 64500df..0c73009 100644
--- a/packages/Models/Othello/Othello/Turn.php
+++ b/packages/Models/Othello/Othello/Turn.php
@@ -47,7 +47,7 @@ public static function make(int $turnNumber, Color $playableColor, Board $board)
     public function advance(Position $position): Turn
     {
         // これ以上進めない場合
-        if (!$this->isAdvanceable()) throw new DomainException();
+        if ($this->isLast()) throw new DomainException();
         // スキップするしかない場合はコマを置けない
         if ($this->mustSkip()) throw new DomainException('このターンはスキップ以外できません。');
 
@@ -67,7 +67,7 @@ public function advance(Position $position): Turn
     public function skip(): Turn
     {
         // これ以上進めない場合
-        if (!$this->isAdvanceable()) throw new DomainException();
+        if ($this->isLast()) throw new DomainException();
         // コマを置くことができる場合はスキップできない
         if (!$this->mustSkip()) throw new DomainException('コマを置くことができるマスがある場合、スキップはできません。');
 
@@ -82,10 +82,10 @@ public function skip(): Turn
      * 最終ターンが終了しているか判定
      * @return bool
      */
-    public function isAdvanceable(): bool
+    public function isLast(): bool
     {
         // 盤面がいっぱいになっていなかったら最終ターンに到達していない = 進行可能
-        return !$this->board->isFulfilled();
+        return $this->board->isFulfilled();
     }
 
     public function mustSkip(): bool
diff --git a/tests/Feature/Models/Othello/Othello/OthelloTest.php b/tests/Feature/Models/Othello/Othello/OthelloTest.php
index 4af36e0..7dccd47 100644
--- a/tests/Feature/Models/Othello/Othello/OthelloTest.php
+++ b/tests/Feature/Models/Othello/Othello/OthelloTest.php
@@ -2,15 +2,14 @@
 
 namespace Tests\Feature\Models\Othello\Othello;
 
-use Packages\Models\Common\Matrix\Matrix;
-use Packages\Models\Othello\Action\Action;
-use Packages\Models\Othello\Action\ActionType;
-use Packages\Models\Othello\Board\Board;
+use Packages\Exceptions\DomainException;
 use Packages\Models\Othello\Board\Color\Color;
-use Packages\Models\Othello\Board\Position\Position;
 use Packages\Models\Othello\Othello\Othello;
+use Packages\Models\Othello\Othello\Status;
 use Packages\Models\Othello\Othello\Turn;
-use Tests\Mock\Models\Othello\Action\FirstTurnActionMock;
+use Tests\Mock\Models\Othello\Action\ActionMock;
+use Tests\Mock\Models\Othello\Board\FulfilledBoard;
+use Tests\Mock\Models\Othello\Board\OneLastActionBoard;
 use Tests\Mock\Models\Othello\Board\SkipBoardMock;
 use Tests\TestCase;
 
@@ -24,29 +23,25 @@ public function オセロ初期化()
 
         // then:
         self::assertTrue(\Str::isUuid($othello->id));
-        self::assertSame(0, $othello->getSkipCount(), 'スキップカウントは0');
+        self::assertSame(Status::PLAYING, $othello->getStatus(), '初期状態はプレー中');
         // 下記の値はそのまま設定される
         self::assertTrue(Turn::init() == $othello->getTurn());
     }
 
     /** @test */
-    public function 通常更新()
+    public function プレー中の場合はゲームを進めることができる()
     {
         // given:
-        $othello = Othello::make(
-            $id = \Str::uuid(),
-            $turn = Turn::init(),
-            0,
-        ); // 1ターン目
-        $action = FirstTurnActionMock::setStone();
+        $othello = Othello::init();
+        $turn = $othello->getTurn();
 
         // when:
+        $action = ActionMock::setStone();
         $othello->apply($action); // プレーを進める
 
         // then:
-        self::assertSame($id->toString(), $othello->id);
+        self::assertSame(Status::PLAYING, $othello->getStatus());
         self::assertTrue($turn->advance($action->getData()) == $othello->getTurn());
-        self::assertSame(0, $othello->getSkipCount());
 
     }
 
@@ -56,13 +51,13 @@ public function スキップせざるを得ないのにコマを置こうとし
         // given:
         $othello = Othello::make(
             \Str::uuid(),
+            Status::PLAYING,
             Turn::make(1, Color::white(), SkipBoardMock::get()),
-            0
-        ); // 1ターン目
+        );
         // when:
-        $action = FirstTurnActionMock::setStone(); // おけない場所
+        $action = ActionMock::setStone(); // おけない場所
         // then:
-        $this->expectException(\Exception::class);
+        $this->expectException(DomainException::class);
         $othello->apply($action);
     }
 
@@ -72,113 +67,71 @@ public function 置ける場所があるのにスキップしようとした場
         // given:
         $othello = Othello::init(); // 1ターン目
         // when:
-        $skipAction = FirstTurnActionMock::skip();
+        $skipAction = ActionMock::skip();
         // then:
-        $this->expectException(\Exception::class);
+        $this->expectException(DomainException::class);
         // 置ける場所があるのに場所指定なしで更新した場合
         $othello->apply($skipAction);
     }
 
-    // ---------------------------------------
-    // 終了条件系
-    // ---------------------------------------
     /** @test */
-    public function 盤面に空いているマスがなくなったら終了()
+    public function ゲームが終了しているのに進めようとしたら例外を出す()
     {
         // given:
-        $fullBoard = Board::make(Matrix::init(8, 8, Color::white()->toCode())->toArray());
-
-        // when:
-        $firstTurn = Turn::init();
-        $lastTurn = Turn::make(20, Color::white(), $fullBoard, 0);
-        // then:
-        self::assertSame(true, $firstTurn->isAdvanceable());
-        self::assertSame(false, $lastTurn->isAdvanceable());
-    }
-
-    /** @test */
-    public function スキップが2ターン続いたら終了()
-    {
-        // given:
-        $position = Position::make([4, 6]);
-
-        // when:
-        $turnSkip0 = Turn::make(20, Color::white(), Board::init(), 0);
-        $turnSkip1 = Turn::make(20, Color::white(), Board::init(), 1);
-        $turnSkip2 = Turn::make(20, Color::white(), Board::init(), 2);
-
+        $interruptedOthello = Othello::make(
+            \Str::uuid(),
+            Status::INTERRUPTED,
+            Turn::make(1, Color::white(), FulfilledBoard::get()),
+        );
+        $resultedOthello = Othello::make(
+            \Str::uuid(),
+            Status::RESULTED,
+            Turn::make(1, Color::white(), FulfilledBoard::get()),
+        );
         // then:
-        // isContinuable()テスト
-        self::assertSame(true,  $turnSkip0->isContinuable());
-        self::assertSame(true,  $turnSkip1->isContinuable());
-        self::assertSame(false, $turnSkip2->isContinuable());
-        // skipカウントとupdateのテスト
-        self::assertSame(true,  !empty($turnSkip0->advance($position))); // next()が問題なく実行できればOK
-        self::assertSame(true,  !empty($turnSkip1->advance($position))); // next()が問題なく実行できればOK
-        // スキップが2回続いたターンを更新しようとすると例外
-        self::expectException(\Exception::class);
-        $turnSkip2->advance($position);
+        self::expectException(DomainException::class);
+        $interruptedOthello->apply(ActionMock::setStone());
+        $interruptedOthello->apply(ActionMock::skip());
+        $resultedOthello->apply(ActionMock::setStone());
+        $resultedOthello->apply(ActionMock::skip());
     }
 
     // ---------------------------------------
-    // スキップ系
+    // 終了条件系
     // ---------------------------------------
     /** @test */
-    public function 盤面における場所がなかったらスキップカウントがアップ()
+    public function 盤面に空いているマスがなくなったら終了()
     {
-        // given:
-        // 白も黒も置ける場所がない盤面
-        $board = SkipBoardMock::get();
-
         // when:
-        $turn1 = Turn::make(1, Color::black(), $board, 0);
-        $turn2 = $turn1->advance();
-        $turn3 = $turn2->advance();
-
+        $othello = Othello::make(
+            \Str::uuid(),
+            Status::PLAYING,
+            Turn::make(1, Color::white(), OneLastActionBoard::get8行8列に白を置くとすべて埋まる盤面()),
+        );
         // then:
-        // 2ターン目
-        self::assertSame(1, $turn2->getSkipCount());
-        self::assertSame(true, $turn2->mustSkip());
-        self::assertSame(true, $turn2->isContinuable());
-        // 3ターン目
-        self::assertSame(2, $turn3->getSkipCount());
-        self::assertSame(true, $turn2->mustSkip());
-        self::assertSame(true, $turn2->isContinuable());
+        $othello->apply(ActionMock::setStone(8, 8));
+        self::assertSame(Status::RESULTED, $othello->getStatus());
     }
 
     /** @test */
-    public function スキップされなかった時、カウントは0に戻る()
+    public function スキップが2ターン続いたら終了()
     {
         // given:
-        $w = Color::white()->toCode();
-        $b = Color::black()->toCode();
-        // 黒がスキップする盤面
-        $board = [
-            [0,0,0,0,0,0,0,0,],
-            [0,0,0,0,0,0,0,0,],
-            [0,0,0,0,0,0,0,0,],
-            [0,0,$b,$w,$b,0,0,0,],
-            [0,0,0,0,0,0,0,0,],
-            [0,0,0,0,0,0,0,0,],
-            [0,0,0,0,0,0,0,0,],
-            [0,0,0,0,0,0,0,0,],
-        ];
-        $board = Board::make($board);
-
         // when:
-        // 黒のターンとして生成
-        $turn1 = Turn::make(1, Color::black(), $board, 0);
-        // 黒が行動(スキップ)
-        $turn2 = $turn1->advance();
-        // 白が行動
-        $turn3 = $turn2->advance(Position::make([4, 2]));
-
+        // 両者ともスキップしかできない盤面
+        $othello = Othello::make(
+            \Str::uuid(),
+            Status::PLAYING,
+            Turn::make(1, Color::white(), SkipBoardMock::白を4行5列に置くと両色ともスキップせざるを得なくなる盤面()),
+        );
         // then:
-        // 2ターン目(黒の行動後の白のターン)
-        self::assertSame(1, $turn2->getSkipCount(), 'スキップしたのでカウントアップ');
-        // 3ターン目(白の行動後の黒のターン)
-        self::assertSame(0, $turn3->getSkipCount(), '色に関わらず行動できたときはリセット');
+        self::assertSame(Status::PLAYING, $othello->getStatus(), 'このターンはプレー中');
+        // 白の行動
+        $othello->apply(ActionMock::setStone(4, 5));
+        self::assertSame(Status::PLAYING, $othello->getStatus(), '白がコマを置くと黒にスキップを強制');
+        // 黒がスキップ
+        $othello->apply(ActionMock::skip());
+        self::assertSame(Status::INTERRUPTED, $othello->getStatus(), '黒がスキップした後、白もスキップせざるを得なくなるため試合終了');
     }
 
-
 }
diff --git a/tests/Feature/Models/Othello/Turn/TurnTest.php b/tests/Feature/Models/Othello/Turn/TurnTest.php
index e54ecbc..76476fd 100644
--- a/tests/Feature/Models/Othello/Turn/TurnTest.php
+++ b/tests/Feature/Models/Othello/Turn/TurnTest.php
@@ -3,11 +3,11 @@
 namespace Tests\Feature\Models\Othello\Turn;
 
 use Packages\Exceptions\DomainException;
-use Packages\Models\Common\Matrix\Matrix;
 use Packages\Models\Othello\Board\Board;
 use Packages\Models\Othello\Board\Color\Color;
 use Packages\Models\Othello\Board\Position\Position;
 use Packages\Models\Othello\Othello\Turn;
+use Tests\Mock\Models\Othello\Board\FulfilledBoard;
 use Tests\Mock\Models\Othello\Board\SkipBoardMock;
 use Tests\TestCase;
 
@@ -88,7 +88,6 @@ public function スキップをした場合ターン数増加とプレイヤー
     /** @test */
     public function 置ける場所があるのにスキップしようとした場合は例外を出す()
     {
-        // given:
         // when:
         $turn = Turn::init(); // 1ターン目
         // then:
@@ -103,16 +102,11 @@ public function 置ける場所があるのにスキップしようとした場
     /** @test */
     public function 盤面に空いているマスがなくなった時が最後のターン()
     {
-        // given:
-        $fullBoard = Board::make(Matrix::init(8, 8, Color::white()->toCode())->toArray());
-
         // when:
         $firstTurn = Turn::init();
-        $lastTurn = Turn::make(20, Color::white(), $fullBoard, 0);
+        $lastTurn = Turn::make(20, Color::white(), FulfilledBoard::get());
         // then:
-        self::assertSame(false, !$firstTurn->isAdvanceable());
-        self::assertSame(true, !$lastTurn->isAdvanceable());
+        self::assertFalse($firstTurn->isLast());
+        self::assertTrue($lastTurn->isLast());
     }
-
-
 }
diff --git a/tests/Mock/Models/Othello/Action/FirstTurnActionMock.php b/tests/Mock/Models/Othello/Action/ActionMock.php
similarity index 67%
rename from tests/Mock/Models/Othello/Action/FirstTurnActionMock.php
rename to tests/Mock/Models/Othello/Action/ActionMock.php
index b323a99..09b89a7 100644
--- a/tests/Mock/Models/Othello/Action/FirstTurnActionMock.php
+++ b/tests/Mock/Models/Othello/Action/ActionMock.php
@@ -6,11 +6,11 @@
 use Packages\Models\Othello\Action\ActionType;
 use Packages\Models\Othello\Board\Position\Position;
 
-class FirstTurnActionMock
+class ActionMock
 {
-    public static function setStone(): Action
+    public static function setStone($row = 4, $col = 6): Action
     {
-        $position = Position::make([4, 6]);// 先行プレイヤーが1ターン目に指す場所
+        $position = Position::make([$row, $col]);// 先行プレイヤーが1ターン目に指す場所
         return Action::make(ActionType::SET_STONE, $position);
     }
 
diff --git a/tests/Mock/Models/Othello/Board/FulfilledBoard.php b/tests/Mock/Models/Othello/Board/FulfilledBoard.php
new file mode 100644
index 0000000..622a72e
--- /dev/null
+++ b/tests/Mock/Models/Othello/Board/FulfilledBoard.php
@@ -0,0 +1,21 @@
+<?php
+
+namespace Tests\Mock\Models\Othello\Board;
+
+use Packages\Models\Common\Matrix\Matrix;
+use Packages\Models\Othello\Board\Board;
+use Packages\Models\Othello\Board\Color\Color;
+
+class FulfilledBoard
+{
+    public static function get(): Board
+    {
+        return Board::make(
+            Matrix::init(
+                8,
+                8,
+                Color::white()->toCode()
+            )->toArray()
+        );
+    }
+}
diff --git a/tests/Mock/Models/Othello/Board/OneLastActionBoard.php b/tests/Mock/Models/Othello/Board/OneLastActionBoard.php
new file mode 100644
index 0000000..12a3290
--- /dev/null
+++ b/tests/Mock/Models/Othello/Board/OneLastActionBoard.php
@@ -0,0 +1,24 @@
+<?php
+
+namespace Tests\Mock\Models\Othello\Board;
+
+use Packages\Models\Common\Matrix\Matrix;
+use Packages\Models\Othello\Board\Board;
+use Packages\Models\Othello\Board\Color\Color;
+
+class OneLastActionBoard
+{
+    public static function get8行8列に白を置くとすべて埋まる盤面(): Board
+    {
+        $matrix = Matrix::init(
+            8,
+            8,
+            Color::white()->toCode()
+        );
+        $matrix->setData(Color::black()->toCode(), 8, 7);
+        $matrix->setData(Board::BOARD_EMPTY, 8, 8);
+        return Board::make(
+            $matrix->toArray()
+        );
+    }
+}
diff --git a/tests/Mock/Models/Othello/Board/SkipBoardMock.php b/tests/Mock/Models/Othello/Board/SkipBoardMock.php
index 487b01a..00c9c19 100644
--- a/tests/Mock/Models/Othello/Board/SkipBoardMock.php
+++ b/tests/Mock/Models/Othello/Board/SkipBoardMock.php
@@ -23,4 +23,21 @@ public static function get(): Board
         ];
         return Board::make($board);
     }
+
+    public static function 白を4行5列に置くと両色ともスキップせざるを得なくなる盤面(): Board
+    {
+        $w = Color::white()->toCode();
+        $b = Color::black()->toCode();
+        $board = [
+            [0,0,0,0,0,0,0,0,],
+            [0,0,0,0,0,0,0,0,],
+            [0,0,0,0,0,0,0,0,],
+            [0,0,0,$w, 0,0,0,0,],
+            [0,0,0,$w,$b,0,0,0,],
+            [0,0,0, 0,$w,0,0,0,],
+            [0,0,0,0,0,0,0,0,],
+            [0,0,0,0,0,0,0,0,],
+        ];
+        return Board::make($board);
+    }
 }