async void InitField(int num, CancellationToken cancellationToken)
    {
        _dangeonFieldModel.IsFieldSetting = true;
        // 画面に設置済みのタイルを全て消す
        _dangeonFieldView.RemoveAllTiles();

        // floornum appear
        // _changeFloorCanvasView.SetActiveAll (true);
        // _changeFloorCanvasView.SetFloorNumText ($"FloorNum:{num}");

        using (var makeFieldSevice = new FieldService(
                   _dangeonFieldView.FieldWidth, _dangeonFieldView.FieldHeith,
                   (int)_playerModel.InitPosVec3.x, (int)_playerModel.InitPosVec3.z))
        {
            _dangeonFieldModel.Field = await makeFieldSevice.MakeFieldAsync(num, cancellationToken);

            _dangeonFieldModel.Map  = new MapClass[_dangeonFieldView.FieldWidth, _dangeonFieldView.FieldHeith];
            _dangeonFieldModel.Item = await makeFieldSevice.SetItemsAsync(num + 10, cancellationToken);
        }
        // 画面に設置する
        SetField();
        SetItems();
        // テスト用 ミニマップを全部表示
        //StartCheckWalkedTilesTest (49, 49);

        await UniTask.Delay(1000);  // todo

        // floornum disappear
        //_changeFloorCanvasView.SetActiveAll (false);
        _dangeonFieldModel.IsFieldSetting = false;
    }