diff --git a/lib/models/converter/group_converter.dart b/lib/models/converter/group_converter.dart
index 96b227f..bcbeba8 100644
--- a/lib/models/converter/group_converter.dart
+++ b/lib/models/converter/group_converter.dart
@@ -5,7 +5,13 @@ class GroupConverter implements JsonConverter<Group, Map<String, dynamic>> {
   const GroupConverter();
 
   @override
-  Group fromJson(Map<String, dynamic> json) => Group.fromJson(json);
+  Group fromJson(Map<String, dynamic> json) {
+    if (json != null) {
+      return Group.fromJson(json);
+    } else {
+      return null;
+    }
+  }
 
   @override
   Map<String, dynamic> toJson(Group group) => group.toJson();
diff --git a/lib/models/converter/notification_converter.dart b/lib/models/converter/notification_converter.dart
index 110a1ef..5d04d7e 100644
--- a/lib/models/converter/notification_converter.dart
+++ b/lib/models/converter/notification_converter.dart
@@ -5,8 +5,14 @@ class NotificationConverter implements JsonConverter<Notification, Map<String, d
   const NotificationConverter();
 
   @override
-  Notification fromJson(Map<String, dynamic> json) => Notification.fromJson(json);
+  Notification fromJson(Map<String, dynamic> json) {
+    if (json != null) {
+      return Notification.fromJson(json);
+    } else {
+      return null;
+    }
+  }
 
   @override
-  Map<String, dynamic> toJson(Notification notification) => notification.toJson();
+  Map<String, dynamic> toJson(Notification notification) => notification?.toJson();
 }
diff --git a/lib/models/converter/participant_converter.dart b/lib/models/converter/participant_converter.dart
index 8e49120..48bde2f 100644
--- a/lib/models/converter/participant_converter.dart
+++ b/lib/models/converter/participant_converter.dart
@@ -5,8 +5,14 @@ class ParticipantConverter implements JsonConverter<Participant, Map<String, dyn
   const ParticipantConverter();
 
   @override
-  Participant fromJson(Map<String, dynamic> json) => Participant.fromJson(json);
+  Participant fromJson(Map<String, dynamic> json) {
+    if (json != null) {
+      return Participant.fromJson(json);
+    } else {
+      return null;
+    }
+  }
 
   @override
-  Map<String, dynamic> toJson(Participant participant) => participant.toJson();
+  Map<String, dynamic> toJson(Participant participant) => participant?.toJson();
 }
diff --git a/lib/models/converter/questionnaire_converter.dart b/lib/models/converter/questionnaire_converter.dart
index 726b14c..4bf1869 100644
--- a/lib/models/converter/questionnaire_converter.dart
+++ b/lib/models/converter/questionnaire_converter.dart
@@ -5,8 +5,14 @@ class QuestionnaireConverter implements JsonConverter<Questionnaire, Map<String,
   const QuestionnaireConverter();
 
   @override
-  Questionnaire fromJson(Map<String, dynamic> json) => Questionnaire.fromJson(json);
+  Questionnaire fromJson(Map<String, dynamic> json) {
+    if (json != null) {
+      return Questionnaire.fromJson(json);
+    } else {
+      return null;
+    }
+  }
 
   @override
-  Map<String, dynamic> toJson(Questionnaire questionnaire) => questionnaire.toJson();
+  Map<String, dynamic> toJson(Questionnaire questionnaire) => questionnaire?.toJson();
 }
diff --git a/lib/pages/home/home_controller.dart b/lib/pages/home/home_controller.dart
index 04fdb58..f51e6b4 100644
--- a/lib/pages/home/home_controller.dart
+++ b/lib/pages/home/home_controller.dart
@@ -1,19 +1,27 @@
+import 'package:flutter/cupertino.dart';
 import 'package:morning_weakers/core/dummy_data.dart';
 import 'package:morning_weakers/models/models.dart';
 import 'package:morning_weakers/pages/home/home_state.dart';
+import 'package:morning_weakers/repositories/hackathon_repository.dart';
 import 'package:state_notifier/state_notifier.dart';
 
 class HomeController extends StateNotifier<HomeState> with LocatorMixin {
   HomeController() : super(const HomeState());
 
+  HackathonRepository get hackathonRepository => read<HackathonRepository>();
+
   @override
   void initState() {
+    debugPrint('debugger: initstatee');
     getData();
   }
 
   //TODO:API生えたら非同期処理実装する！
-  Future<void> getData() {
-    final Hackathon hackathon = dummyHackathon();
+  Future<void> getData() async{
+    debugPrint('debugger: hackathonId ${hackathonRepository.currentHackathonId}');
+    final Hackathon hackathon = await hackathonRepository.getHackathon(hackathonRepository.currentHackathonId);
+    debugPrint('debugger: hackathonId ${hackathon}');
+    //final Hackathon hackathon = dummyHackathon();
     state = state.copyWith(hackathon: hackathon);
   }
 }
diff --git a/lib/pages/home/widget/notification_widget.dart b/lib/pages/home/widget/notification_widget.dart
index 908ecdc..b8a1024 100644
--- a/lib/pages/home/widget/notification_widget.dart
+++ b/lib/pages/home/widget/notification_widget.dart
@@ -7,9 +7,9 @@ import 'package:provider/provider.dart';
 class NotificationWidget extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
-    final List<model.Notification> notification = context.select<HomeState, List<model.Notification>>(
-      (state) => state.hackathon.notifications,
-    );
+    // TODO: hackathonがnullだからそこfix
+    final List<model.Notification> notification =
+        context.select<HomeState, List<model.Notification>>((state) => state.hackathon.notifications);
     // ignore: cascade_invocations
     notification.sort((a, b) => a.createdAt.compareTo(b.createdAt));
 
diff --git a/lib/repositories/hackathon_repository.dart b/lib/repositories/hackathon_repository.dart
index 8db271e..0d3c467 100644
--- a/lib/repositories/hackathon_repository.dart
+++ b/lib/repositories/hackathon_repository.dart
@@ -14,7 +14,6 @@ class HackathonRepository {
     final Map<String, dynamic> hackMap = hackathon.copyWith(id: hackRef.documentID).toJson()
       ..remove('participants')
       ..remove('groups')
-      ..remove('questionnaire')
       ..remove('notifications');
     debugPrint(hackMap.toString());
     await hackRef.setData(hackMap).whenComplete(() {
@@ -57,7 +56,7 @@ class HackathonRepository {
       ..putIfAbsent('id', () => hackRef.documentID)
       ..putIfAbsent('participants', () => participants)
       ..putIfAbsent('groups', () => groups)
-      ..putIfAbsent('notification', () => notifications)));
+      ..putIfAbsent('notifications', () => notifications)));
   }
 
   /// Drawerに表示するハッカソンアイコン一覧とidの取得, 所属なしならnullが返る