diff --git a/src/index.ts b/src/index.ts
index 7932a74..76dd949 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -123,8 +123,19 @@ export class GeoJsonlookfor {
   /* *****************
    * geojsonを返す 
    * *****************/
-  getGeoJSON() {
+  getGeoJSON(number?: number) {
+    if (number !== undefined) {
+      this.geojson.features = this.geojson.features.slice(0, number);
+    }
     return this.geojson
   }
+  
+
+  /* *******************
+   * featureの件数を取得する
+   * *******************/ 
+  getFeatureCount() {
+    return this.geojson.features.length;
+  }
     
 }
diff --git a/test/testByGetDataType.ts b/test/testByGetDataType.ts
new file mode 100644
index 0000000..a96f076
--- /dev/null
+++ b/test/testByGetDataType.ts
@@ -0,0 +1,60 @@
+import { assert } from 'chai';
+import * as fs from 'fs';
+import { GeoJsonlookfor } from '../src/index';
+
+
+// testデータのディレクトリ名を取得する
+const geojson = JSON.parse(fs.readFileSync(`${__dirname}/test.geojson`, 'utf8'));
+
+/* *******************
+ * 取得するデータ別のテスト
+ * *******************/
+describe('Test by return value', () => {
+
+    // 件数を取得する
+    it('Get the number of cases', () => {
+        const gl = new GeoJsonlookfor(geojson); 
+        const res = gl.match('スイーツ').getFeatureCount();
+        assert.deepEqual(4, res);
+    });
+
+    // 指定した件数分featureを取得する
+    it('Get the number of cases', () => {
+        const gl = new GeoJsonlookfor(geojson); 
+        const res = gl.match('スイーツ').getGeoJSON(2);
+        assert.deepEqual({
+            "type": "FeatureCollection",
+            "features": [
+                {
+                    "type": "Feature",
+                    "properties": {
+                    "name": "スイーツショップ",
+                    "address": "埼玉県桶川市川田谷",
+                    "category": "スイーツ"
+                    },
+                    "geometry": {
+                    "coordinates": [
+                        139.517720985072,
+                        35.99865685174926
+                    ],
+                    "type": "Point"
+                    }
+                },{
+                    "type": "Feature",
+                    "properties": {
+                    "name": "菓子店",
+                    "address": "埼玉県川越市中老袋",
+                    "category": "スイーツ"
+                    },
+                    "geometry": {
+                    "coordinates": [
+                        139.5371783066526,
+                        35.941979468748585
+                    ],
+                    "type": "Point"
+                    }
+                }
+            ]
+        }, res);
+    });
+});