test.geojson

{
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "properties": {
        "_color": "#000000",
        "_opacity": 0.5,
        "_weight": 3,
        "_fillColor": "#ff0000",
        "_fillOpacity": 0.5
      },
      "geometry": {
        "type": "Polygon",
        "coordinates": [
          [
            [
              139.707513,
              35.68503
            ],
            [
              139.707448,
              35.680115
            ],
            [
              139.715023,
              35.680185
            ],
            [
              139.71513,
              35.685082
            ],
            [
              139.707513,
              35.68503
            ]
          ]
        ]
      }
    }
  ]
}