diff --git a/app/src/main/java/com/example/cosmosclient/services/CosmosBackgroundService.java b/app/src/main/java/com/example/cosmosclient/services/CosmosBackgroundService.java
index 055ec70..004a50a 100644
--- a/app/src/main/java/com/example/cosmosclient/services/CosmosBackgroundService.java
+++ b/app/src/main/java/com/example/cosmosclient/services/CosmosBackgroundService.java
@@ -2,7 +2,6 @@
 
 import android.Manifest;
 import android.app.IntentService;
-import android.app.Notification;
 import android.app.NotificationChannel;
 import android.app.NotificationManager;
 import android.app.PendingIntent;
@@ -39,6 +38,8 @@
 import java.io.IOException;
 import java.io.PrintWriter;
 import java.util.ArrayList;
+import java.util.Date;
+import java.util.HashMap;
 import java.util.List;
 import java.util.TimeZone;
 import java.util.Timer;
@@ -120,7 +121,7 @@
             channel.enableVibration(false);
             if (notificationManager != null) {
                 notificationManager.createNotificationChannel(channel);
-                Notification notification = new Notification.Builder(context, channelId)
+                android.app.Notification notification = new android.app.Notification.Builder(context, channelId)
                         .setContentTitle(title)
                         // 本来なら衛星のアイコンですがandroid標準アイコンを設定
                         .setSmallIcon(android.R.drawable.btn_star)
@@ -247,7 +248,7 @@
 //        Log.d(TAG, "onLocationChanged");
         Log.d(TAG, "lat:" + location.getLatitude());
         Log.d(TAG, "lon:" + location.getLongitude());
-        
+
         updateAreaInformation(location);
         this.notifications=searchNotifications(cosmos,location);
 
@@ -420,10 +421,85 @@
             });
         }
 
+
     }
     public List<Notification> searchNotifications(Cosmos cosmos, Location location){
 
-        return null;
+        double NowLat =location.getLatitude();
+        double NowLon =location.getLongitude();
+        //業番:notification
+        HashMap<Integer, ArrayList<Notification>> codeToNotification = new HashMap<>();
+        //業番:feature
+        HashMap<Integer, ArrayList<Feature>> codeToFeature = new HashMap<>();
+        ArrayList<Group> groups =(ArrayList<Group>) cosmos.getGroups();
+
+        //現在時刻取得
+        Date nowDate = new Date();
+        //codeToNotificationを作成。Featureはnull
+        for(int i = 0 ; i < groups.size(); i++) {
+            //requestのArrayListを回す
+            for (int j = 0; j < groups.get(i).getRequestList().getRequests().size(); j++) {
+                //codeToNotificationに格納するArrayList<Notification>を初期化
+                ArrayList<Notification> notifications = null;
+                //期限内かつ未達成のrequestのみ取得
+                if (groups.get(i).getRequestList().getRequests().get(j).getDeadline().after(nowDate) && groups.get(i).getRequestList().getRequests().get(j).isDone() == false) {
+                    //notificationを作成
+                    Notification notification = new Notification(groups.get(i).getRequestList().getRequests().get(j),groups.get(i),null);
+                    //指定したkey(業番)を持っているHashMapがなければ作成する。
+                    if(codeToNotification.get(groups.get(i).getRequestList().getRequests().get(j))==null){
+                        notifications.add(notification);
+                        codeToNotification.put(groups.get(i).getRequestList().getRequests().get(j).getLocation(),notifications);
+                    }else{
+                        //keyをすでに持っている場合はArrayList<Notification>にnotification単体を追加していく
+                        codeToNotification.get(groups.get(i).getRequestList().getRequests().get(j).getLocation()).add(notification);
+                    }
+                }
+            }
+        }
+        //cosmosから区画情報から取得
+        int areaInfoId =(int)((NowLat+90)/0.1)+(int)((NowLon/0.1)*1800);
+        codeToFeature =cosmos.getAreaInfo(areaInfoId).getFeature();
+        //codeToFeatureの中の50m圏外Featureを削除していく。
+        //HashMapを順番に実行
+        for(HashMap.Entry<Integer, ArrayList<Feature>> e : codeToFeature.entrySet()) {
+            //ArrayList<Feature>>を回していく
+            for(int i=e.getValue().size(); i >= 0;i--) {
+                float[] distance = getDistance(NowLat, NowLon, e.getValue().get(i).getLocation().getLatitude(), e.getValue().get(i).getLocation().getLongitude());
+                // distance[0] = [２点間の距離]
+                //50m圏外のFeatureを削除
+                if (distance[0] > 50) {
+                    e.getValue().remove(i);
+                }
+            }
+            //codeToNotificationのkeyとcodeToFeatureのkeyが一致すれば
+            //codeToFeatureのArray<Feature>をcodeToNotificationのArray<Feature>featuresに代入する
+            if(codeToNotification.containsKey(e.getKey())==true){
+                for(int j=0;j<codeToNotification.get(e.getKey()).size();j++) {
+                    codeToNotification.get(e.getKey()).get(j).setFeatures(e.getValue());
+                }
+            }
+        }
+
+        ArrayList<Notification> result = new ArrayList<Notification>();
+
+        for (ArrayList<Notification> list: codeToNotification.values()) {
+            result.addAll(list);
+        }
+
+        return result;
+    }
+    public float[] getDistance(double x, double y, double x2, double y2) {
+        // 結果を格納するための配列を生成
+        float[] results = new float[3];
+        // results[0] = [２点間の距離]
+        // results[1] = [始点から見た方位角]
+        // results[2] = [終点から見た方位角]
+
+        // 距離計算
+        Location.distanceBetween(x, y, x2, y2, results);
+
+        return results;
+
     }
 
 }