diff --git a/backend/app/controllers/ip_addresses_controller.rb b/backend/app/controllers/ip_addresses_controller.rb
deleted file mode 100644
index 5ede22a..0000000
--- a/backend/app/controllers/ip_addresses_controller.rb
+++ /dev/null
@@ -1,20 +0,0 @@
-class IpAddressesController < ApplicationController
-  def index
-    @ip_addresses = IpAddress.all
-
-    render json: @ip_addresses
-  end
-
-  def show
-    render json: @ip_address
-  end
-
-  def create
-  end
-
-  def update
-  end
-
-  def destroy
-  end
-end
diff --git a/backend/app/controllers/nico_tag_relation_controller.rb b/backend/app/controllers/nico_tag_relation_controller.rb
deleted file mode 100644
index 974f20e..0000000
--- a/backend/app/controllers/nico_tag_relation_controller.rb
+++ /dev/null
@@ -1,16 +0,0 @@
-class NicoTagRelationController < ApplicationController
-  def index
-  end
-
-  def show
-  end
-
-  def create
-  end
-
-  def update
-  end
-
-  def destroy
-  end
-end
diff --git a/backend/app/controllers/post_tags_controller.rb b/backend/app/controllers/post_tags_controller.rb
deleted file mode 100644
index 467074e..0000000
--- a/backend/app/controllers/post_tags_controller.rb
+++ /dev/null
@@ -1,16 +0,0 @@
-class PostTagsController < ApplicationController
-  def index
-  end
-
-  def show
-  end
-
-  def create
-  end
-
-  def update
-  end
-
-  def destroy
-  end
-end
diff --git a/backend/app/controllers/tag_aliases_controller.rb b/backend/app/controllers/tag_aliases_controller.rb
deleted file mode 100644
index cbfd36f..0000000
--- a/backend/app/controllers/tag_aliases_controller.rb
+++ /dev/null
@@ -1,16 +0,0 @@
-class TagAliasesController < ApplicationController
-  def index
-  end
-
-  def show
-  end
-
-  def create
-  end
-
-  def update
-  end
-
-  def destroy
-  end
-end
diff --git a/backend/app/controllers/user_ips_controller.rb b/backend/app/controllers/user_ips_controller.rb
deleted file mode 100644
index c02396b..0000000
--- a/backend/app/controllers/user_ips_controller.rb
+++ /dev/null
@@ -1,16 +0,0 @@
-class UserIpsController < ApplicationController
-  def index
-  end
-
-  def show
-  end
-
-  def create
-  end
-
-  def update
-  end
-
-  def destroy
-  end
-end
diff --git a/backend/app/controllers/user_post_views_controller.rb b/backend/app/controllers/user_post_views_controller.rb
deleted file mode 100644
index 2bcefcd..0000000
--- a/backend/app/controllers/user_post_views_controller.rb
+++ /dev/null
@@ -1,16 +0,0 @@
-class UserPostViewsController < ApplicationController
-  def index
-  end
-
-  def show
-  end
-
-  def create
-  end
-
-  def update
-  end
-
-  def destroy
-  end
-end
diff --git a/backend/config/routes.rb b/backend/config/routes.rb
index 206d1a6..31143a8 100644
--- a/backend/config/routes.rb
+++ b/backend/config/routes.rb
@@ -50,11 +50,5 @@ Rails.application.routes.draw do
     end
   end
 
-  resources :ip_addresses
-  resources :nico_tag_relations
-  resources :post_tags
   resources :settings
-  resources :tag_aliases
-  resources :user_ips
-  resources :user_post_views
 end