diff --git a/backend/app/Http/Controllers/Api/AuthenticationTrait.php b/backend/app/Http/Controllers/Api/AuthenticationTrait.php
index bf3588dc..76ef7242 100644
--- a/backend/app/Http/Controllers/Api/AuthenticationTrait.php
+++ b/backend/app/Http/Controllers/Api/AuthenticationTrait.php
@@ -127,7 +127,7 @@ trait AuthenticationTrait {
         // セッションを想像する
         $login_user_datum = $this->makeSession($this->getGuard(), $get->toArray());
 
-        return ['status_code' => 200, 'params' => ['id' => $login_user_datum['id']]];
+        return ['status_code' => 200, 'params' => ['id' => $login_user_datum['id'], 'expire' => env('SESSION_LIFETIME')]];
     }
 
     public function logout () {
diff --git a/backend/app/Http/Controllers/Api/ChildrenController.php b/backend/app/Http/Controllers/Api/ChildrenController.php
index 0d5af95d..03f5d927 100644
--- a/backend/app/Http/Controllers/Api/ChildrenController.php
+++ b/backend/app/Http/Controllers/Api/ChildrenController.php
@@ -96,7 +96,13 @@ class ChildrenController extends Controller {
 
     public function checkRegisterMain (Request $r) {
         // トークンの確認
-        if (null === ($get = TelActivation::select('tel')->where('token', $r->token)->first())) {
+        if (null === ($get = TelActivation::select('tel', 'ttl')->where('token', $r->token)->first())) {
+            return ['status_code' => 400, 'error_messages' => ['不正な登録トークン。']];
+        }
+
+        // トークンの有効期限が切れた場合
+        if (time() > strtotime($get->ttl)) {
+            TelActivation::where('token', $r->token)->delete();
             return ['status_code' => 400, 'error_messages' => ['不正な登録トークン。']];
         }
 
@@ -119,7 +125,9 @@ class ChildrenController extends Controller {
 
         // 親子関係の上限の場合
         if (!is_null($get->father_id) && null !== ($rel = FatherRelation::where('father_id', $get->father_id)->first())) {
-            if (Father::select('relation_limit')->where('id', $get->father_id)->first()->relation_limit >= FatherRelation::where('father_id', $get->father_id)->count()) {
+            $fa = Father::select('relation_limit')->where('id', $get->father_id)->first();
+            $fr = FatherRelation::where('father_id', $get->father_id)->count();
+            if (null !== $fa && $fr >= $fa->relation_limit) {
                 return ['status_code' => 400, 'error_messages' => ['仮登録の有効期限が切れました。改めて親にお問い合わせいただき、再登録の手続きを行ってください。']];
             }
         }
diff --git a/backend/app/Http/Controllers/Api/FathersController.php b/backend/app/Http/Controllers/Api/FathersController.php
index a446d388..7d3d037b 100644
--- a/backend/app/Http/Controllers/Api/FathersController.php
+++ b/backend/app/Http/Controllers/Api/FathersController.php
@@ -142,7 +142,13 @@ class FathersController extends Controller {
 
     public function checkRegisterMain (Request $r) {
         // トークンの確認
-        if (null === ($get = EmailActivation::where('token', $r->token)->first())) {
+        if (null === ($get = EmailActivation::select('ttl')where('token', $r->token)->first())) {
+            return ['status_code' => 400, 'error_messages' => ['不正な登録トークン。']];
+        }
+
+        // トークンの有効期限が切れた場合
+        if (time() > strtotime($get->ttl)) {
+            EmailActivation::where('token', $r->token)->delete();
             return ['status_code' => 400, 'error_messages' => ['不正な登録トークン。']];
         }