diff --git a/backend/.env.example b/backend/.env.example
index 56d0dd35..b1ded5ec 100644
--- a/backend/.env.example
+++ b/backend/.env.example
@@ -2,7 +2,7 @@ APP_NAME=Laravel
 APP_ENV=local
 APP_KEY=
 APP_DEBUG=true
-APP_URL=http://localhost
+APP_URL=http://127.0.0.1
 
 LOG_CHANNEL=stack
 LOG_LEVEL=debug
diff --git a/backend/app/Http/Controllers/Api/FathersController.php b/backend/app/Http/Controllers/Api/FathersController.php
index ade87976..85177bee 100644
--- a/backend/app/Http/Controllers/Api/FathersController.php
+++ b/backend/app/Http/Controllers/Api/FathersController.php
@@ -13,6 +13,7 @@ use Illuminate\Support\Facades\Storage;
 use App\Models\Father;
 use App\Models\FatherRelation;
 use App\Models\EmailActivation;
+use App\Mail\FathersForgetPasswordMail;
 use App\Mail\FathersRegistrationTemporaryMail;
 use App\Mail\FathersRegistrationMainMail;
 
@@ -38,7 +39,7 @@ class FathersController extends Controller {
             return ['status_code' => 422, 'error_messages' => $validate->errors()];
         }
 
-        if ($result = Father::select('id')->where('email', $r->email)->first()) {
+        if (null === ($result = Father::select('id')->where('email', $r->email)->first())) {
             // メールアドレス照合に失敗
             return ['status_code' => 400, 'error_messages' => ['メールアドレスが未登録です。入力した情報を確認してください。']];
         }
@@ -57,7 +58,7 @@ class FathersController extends Controller {
             EmailActivation::create($create);
 
             // メールを送ります。
-            Mail::to($r->email)->send(new FathersRegistrationTemporaryMail($token));
+            Mail::to($r->email)->send(new FathersForgetPasswordMail($token));
         } catch (\Throwable $e) {
             // 失敗
             Log::critical($e->getMessage());
@@ -400,17 +401,17 @@ class FathersController extends Controller {
             $father_id = $r->father_id;
         }
 
+        else if (isset($r->token)) {
+            if (null === ($ea = EmailActivation::select('father_id')->where('token', $r->token)->first())) {
+                return ['status_code' => 400, 'error_messages' => ['パスワードの更新に失敗しました。']];
+            }
+            $father_id = (int)$ea->father_id;
+        }
+
         if (is_null($father_id) && !isset($r->token)) {
             return ['status_code' => 400, 'error_messages' => ['パスワードの更新に失敗しました。']];
         }
 
-        // if (isset($r->token)) {
-        //     if (null === ($father_id = EmailActivation::select('father_id')->where('token', $r->token)->first())) {
-        //         return ['status_code' => 400, 'error_messages' => ['パスワードの更新に失敗しました。']];
-        //     }
-        //     $father_id = (int)$father_id->father_id;
-        // }
-
         // バリデーションエラー
         $validate = Validator::make($r->all(), [
             'password' => 'required|min:8|max:72|confirmed',
@@ -426,6 +427,10 @@ class FathersController extends Controller {
 
         try {
             Father::where('id', (int)$father_id)->update($update);
+
+            if (isset($r->token)) {
+                EmailActivation::where('token', $r->token)->delete();
+            }
         } catch (\Throwable $e) {
             // 失敗
             Log::critical($e->getMessage());
diff --git a/backend/app/Mail/FathersForgetPasswordMail.php b/backend/app/Mail/FathersForgetPasswordMail.php
new file mode 100644
index 00000000..dfc3541e
--- /dev/null
+++ b/backend/app/Mail/FathersForgetPasswordMail.php
@@ -0,0 +1,23 @@
+<?php
+
+namespace App\Mail;
+
+use Illuminate\Bus\Queueable;
+use Illuminate\Contracts\Queue\ShouldQueue;
+use Illuminate\Mail\Mailable;
+use Illuminate\Queue\SerializesModels;
+
+class FathersForgetPasswordMail extends Mailable {
+    use Queueable, SerializesModels;
+    private $token;
+
+    public function __construct ($token) {
+        $this->token = $token;
+    }
+
+    public function build () {
+        return $this->subject('パスワードリセットを依頼しました。')->markdown('emails.fathers.forgotpassword', [
+            'token' => $this->token
+        ]);
+    }
+}
diff --git a/backend/app/Models/EmailActivation.php b/backend/app/Models/EmailActivation.php
index c4bb7a29..90839929 100644
--- a/backend/app/Models/EmailActivation.php
+++ b/backend/app/Models/EmailActivation.php
@@ -8,6 +8,6 @@ use Illuminate\Database\Eloquent\Model;
 class EmailActivation extends Model
 {
     use HasFactory;
-    protected $fillable = ['email', 'token', 'ttl'];
+    protected $fillable = ['type', 'father_id', 'email', 'token', 'ttl'];
     protected $attributes = ['type' => 0];
 }
diff --git a/backend/config/app.php b/backend/config/app.php
index 2a25ae77..9fe825e4 100644
--- a/backend/config/app.php
+++ b/backend/config/app.php
@@ -52,7 +52,7 @@ return [
     |
     */
 
-    'url' => env('APP_URL', 'http://localhost'),
+    'url' => env('APP_URL', 'http://127.0.0.1'),
 
     'asset_url' => env('ASSET_URL', null),
 
diff --git a/backend/resources/views/emails/fathers/forgotpassword.blade.php b/backend/resources/views/emails/fathers/forgotpassword.blade.php
new file mode 100644
index 00000000..c7d7ce50
--- /dev/null
+++ b/backend/resources/views/emails/fathers/forgotpassword.blade.php
@@ -0,0 +1,11 @@
+@component('mail::message')
+# パスワードリセットを依頼しました。
+
+サイトへのパスワードリセットを依頼しました。
+
+以下のリンクからパスワードを再設定してください。
+
+@component('mail::button', ['url' => url('/').'/p-account/forgot-password/reset/'.$token])
+{{ url('/') }}/p-account/forgot-password/reset/{{ $token }}
+@endcomponent
+@endcomponent
diff --git a/backend/resources/views/emails/fathers/registration/main.blade.php b/backend/resources/views/emails/fathers/registration/main.blade.php
index 384068d0..de7cbe09 100644
--- a/backend/resources/views/emails/fathers/registration/main.blade.php
+++ b/backend/resources/views/emails/fathers/registration/main.blade.php
@@ -5,7 +5,7 @@
 
 以下のリンクからログインしてくださいませ。
 
-@component('mail::button', ['url' => env('APP_URL').'/p-account/login'])
-{{ env('APP_URL') }}/p-account/login
+@component('mail::button', ['url' => url('/').'/p-account/login'])
+{{ url('/') }}/p-account/login
 @endcomponent
 @endcomponent
diff --git a/backend/resources/views/emails/fathers/registration/temporary.blade.php b/backend/resources/views/emails/fathers/registration/temporary.blade.php
index 10a0853a..400f680a 100644
--- a/backend/resources/views/emails/fathers/registration/temporary.blade.php
+++ b/backend/resources/views/emails/fathers/registration/temporary.blade.php
@@ -5,7 +5,7 @@
 
 以下のリンクからログインして、本登録を完了させてください。
 
-@component('mail::button', ['url' => env('APP_URL').'/p-account/register/'.$token])
-{{ env('APP_URL') }}/p-account/register/{{ $token }}
+@component('mail::button', ['url' => url('/').'/p-account/register/'.$token])
+{{ url('/') }}/p-account/register/{{ $token }}
 @endcomponent
 @endcomponent