diff --git a/app/mailers/activity_mailer.rb b/app/mailers/activity_mailer.rb
index 353d765dfbb..335f339e86e 100644
--- a/app/mailers/activity_mailer.rb
+++ b/app/mailers/activity_mailer.rb
@@ -326,6 +326,24 @@ def update_regular_event(args = {})
     message
   end
 
+  # required params: question, receiver
+  def no_correct_answer(args = {})
+    @question ||= args[:question]
+    @receiver ||= args[:receiver]
+    @user = @receiver
+
+    @link_url = notification_redirector_url(
+      link: "/questions/#{@question.id}",
+      kind: Notification.kinds[:no_correct_answer]
+    )
+
+    subject = "[FBC] #{@user.login_name}さんの質問【 #{@question.title} 】のベストアンサーがまだ選ばれていません。"
+    message = mail to: @user.email, subject: subject
+    message.perform_deliveries = @user.mail_notification? && !@user.retired?
+
+    message
+  end
+
   # required params: sender, receiver
   def signed_up(args = {})
     @sender ||= args[:sender]
diff --git a/app/mailers/notification_mailer.rb b/app/mailers/notification_mailer.rb
index f3853b75630..6b94ae64e3f 100644
--- a/app/mailers/notification_mailer.rb
+++ b/app/mailers/notification_mailer.rb
@@ -68,12 +68,4 @@ def create_page
     subject = "[FBC] #{@page.user.login_name}さんがDocsに#{@page.title}を投稿しました。"
     mail to: @user.email, subject: subject
   end
-
-  # required params: question, receiver
-  def no_correct_answer
-    @user = @receiver
-    @notification = @user.notifications.find_by(link: "/questions/#{@question.id}", kind: Notification.kinds[:no_correct_answer])
-    subject = "[FBC] #{@user.login_name}さんの質問【 #{@question.title} 】のベストアンサーがまだ選ばれていません。"
-    mail to: @user.email, subject: subject
-  end
 end
diff --git a/app/models/notification_facade.rb b/app/models/notification_facade.rb
index d4ab724248c..cc34d28b23c 100644
--- a/app/models/notification_facade.rb
+++ b/app/models/notification_facade.rb
@@ -30,14 +30,4 @@ def self.trainee_report(report, receiver)
   def self.coming_soon_regular_events(today_events, tomorrow_events)
     DiscordNotifier.with(today_events: today_events, tomorrow_events: tomorrow_events).coming_soon_regular_events.notify_now
   end
-
-  def self.no_correct_answer(question, receiver)
-    ActivityNotifier.with(question: question, receiver: receiver).no_correct_answer.notify_now
-    return unless receiver.mail_notification? && !receiver.retired?
-
-    NotificationMailer.with(
-      question: question,
-      receiver: receiver
-    ).no_correct_answer.deliver_later(wait: 5)
-  end
 end
diff --git a/app/models/question.rb b/app/models/question.rb
index 617d694a141..d08cf1ba982 100644
--- a/app/models/question.rb
+++ b/app/models/question.rb
@@ -39,7 +39,7 @@ def notify_certain_period_passed_after_last_answer
       return if Question.not_solved_and_certain_period_has_passed.blank?
 
       Question.not_solved_and_certain_period_has_passed.each do |not_solved_question|
-        NotificationFacade.no_correct_answer(not_solved_question, not_solved_question.user)
+        ActivityDelivery.with(question: not_solved_question, receiver: not_solved_question.user).notify(:no_correct_answer)
       end
     end
 
diff --git a/app/views/activity_mailer/no_correct_answer.html.slim b/app/views/activity_mailer/no_correct_answer.html.slim
new file mode 100644
index 00000000000..d9f68aa4e55
--- /dev/null
+++ b/app/views/activity_mailer/no_correct_answer.html.slim
@@ -0,0 +1 @@
+= render '/notification_mailer/notification_mailer_template', title: "#{@user.login_name}さんの質問【 #{@question.title} 】のベストアンサーがまだ選ばれていません。", link_url: @link_url, link_text: "#{@user.login_name}さんの質問へ"
diff --git a/app/views/notification_mailer/no_correct_answer.html.slim b/app/views/notification_mailer/no_correct_answer.html.slim
deleted file mode 100644
index 38877c95751..00000000000
--- a/app/views/notification_mailer/no_correct_answer.html.slim
+++ /dev/null
@@ -1 +0,0 @@
-= render 'notification_mailer_template', title: "#{@user.login_name}さんの質問【 #{@question.title} 】のベストアンサーがまだ選ばれていません。", link_url: notification_url(@notification), link_text: "#{@user.login_name}さんの質問へ"
diff --git a/test/deliveries/activity_delivery_test.rb b/test/deliveries/activity_delivery_test.rb
index 605c4d4ce6b..257867c989a 100644
--- a/test/deliveries/activity_delivery_test.rb
+++ b/test/deliveries/activity_delivery_test.rb
@@ -368,4 +368,28 @@ class ActivityDeliveryTest < ActiveSupport::TestCase
       ActivityDelivery.with(**params).notify(:chose_correct_answer)
     end
   end
+
+  test '.notify(:no_correct_answer)' do
+    question = questions(:question1)
+    params = {
+      question: question,
+      receiver: question.user
+    }
+
+    assert_difference -> { AbstractNotifier::Testing::Driver.deliveries.count }, 1 do
+      ActivityDelivery.notify!(:no_correct_answer, **params)
+    end
+
+    assert_difference -> { AbstractNotifier::Testing::Driver.enqueued_deliveries.count }, 1 do
+      ActivityDelivery.notify(:no_correct_answer, **params)
+    end
+
+    assert_difference -> { AbstractNotifier::Testing::Driver.deliveries.count }, 1 do
+      ActivityDelivery.with(**params).notify!(:no_correct_answer)
+    end
+
+    assert_difference -> { AbstractNotifier::Testing::Driver.enqueued_deliveries.count }, 1 do
+      ActivityDelivery.with(**params).notify(:no_correct_answer)
+    end
+  end
 end
diff --git a/test/mailers/activity_mailer_test.rb b/test/mailers/activity_mailer_test.rb
index b2771479020..334c07bbf69 100644
--- a/test/mailers/activity_mailer_test.rb
+++ b/test/mailers/activity_mailer_test.rb
@@ -989,4 +989,38 @@ class ActivityMailerTest < ActionMailer::TestCase
 
     assert ActionMailer::Base.deliveries.empty?
   end
+
+  test 'no_correct_answer using synchronous mailer' do
+    question = questions(:question1)
+    receiver = question.user
+
+    ActivityMailer.no_correct_answer(question: question, receiver: receiver).deliver_now
+
+    assert_not ActionMailer::Base.deliveries.empty?
+    email = ActionMailer::Base.deliveries.last
+    query = CGI.escapeHTML({ kind: Notification.kinds[:no_correct_answer], link: "/questions/#{question.id}" }.to_param)
+    assert_equal ['noreply@bootcamp.fjord.jp'], email.from
+    assert_equal [receiver.email], email.to
+    assert_equal "[FBC] #{receiver.login_name}さんの質問【 #{question.title} 】のベストアンサーがまだ選ばれていません。", email.subject
+    assert_match(%r{<a .+ href="http://localhost:3000/notification/redirector\?#{query}">#{receiver.login_name}さんの質問へ</a>}, email.body.to_s)
+  end
+
+  test 'no_correct_answer with params using asynchronous mailer' do
+    question = questions(:question1)
+    receiver = question.user
+
+    mailer = ActivityMailer.with(question: question, receiver: receiver).no_correct_answer
+
+    perform_enqueued_jobs do
+      mailer.deliver_later
+    end
+
+    assert_not ActionMailer::Base.deliveries.empty?
+    email = ActionMailer::Base.deliveries.last
+    query = CGI.escapeHTML({ kind: Notification.kinds[:no_correct_answer], link: "/questions/#{question.id}" }.to_param)
+    assert_equal ['noreply@bootcamp.fjord.jp'], email.from
+    assert_equal [receiver.email], email.to
+    assert_equal "[FBC] #{receiver.login_name}さんの質問【 #{question.title} 】のベストアンサーがまだ選ばれていません。", email.subject
+    assert_match(%r{<a .+ href="http://localhost:3000/notification/redirector\?#{query}">#{receiver.login_name}さんの質問へ</a>}, email.body.to_s)
+  end
 end
diff --git a/test/mailers/notification_mailer_test.rb b/test/mailers/notification_mailer_test.rb
index d3c5eb20be2..cf1798c2da0 100644
--- a/test/mailers/notification_mailer_test.rb
+++ b/test/mailers/notification_mailer_test.rb
@@ -43,32 +43,4 @@ class NotificationMailerTest < ActionMailer::TestCase
     assert_equal '[FBC] kensyuさんが日報【 研修の日報 】を書きました！', email.subject
     assert_match(/日報/, email.body.to_s)
   end
-
-  test 'no_correct_answer' do
-    user = users(:kimura)
-    question = questions(:question8)
-    Notification.create!(
-      kind: 22,
-      sender: user,
-      user: user,
-      message: 'Q&A「テストの質問」のベストアンサーがまだ選ばれていません。',
-      link: "/questions/#{question.id}",
-      read: false
-    )
-    mailer = NotificationMailer.with(
-      question: question,
-      receiver: user
-    ).no_correct_answer
-
-    perform_enqueued_jobs do
-      mailer.deliver_later
-    end
-
-    assert_not ActionMailer::Base.deliveries.empty?
-    email = ActionMailer::Base.deliveries.last
-    assert_equal ['noreply@bootcamp.fjord.jp'], email.from
-    assert_equal ['kimura@fjord.jp'], email.to
-    assert_equal '[FBC] kimuraさんの質問【 テストの質問 】のベストアンサーがまだ選ばれていません。', email.subject
-    assert_match(/まだ選ばれていません/, email.body.to_s)
-  end
 end
diff --git a/test/mailers/previews/activity_mailer_preview.rb b/test/mailers/previews/activity_mailer_preview.rb
index aaed95efe96..83fdd3dc11a 100644
--- a/test/mailers/previews/activity_mailer_preview.rb
+++ b/test/mailers/previews/activity_mailer_preview.rb
@@ -153,4 +153,11 @@ def chose_correct_answer
 
     ActivityMailer.with(answer: answer, receiver: receiver).chose_correct_answer
   end
+
+  def no_correct_answer
+    question = Question.find(ActiveRecord::FixtureSet.identify(:question1))
+    receiver = User.find(question.user_id)
+
+    ActivityMailer.with(question: question, receiver: receiver).no_correct_answer
+  end
 end