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/posts_controller.rb b/backend/app/controllers/posts_controller.rb
index a3a4538..0792bf7 100644
--- a/backend/app/controllers/posts_controller.rb
+++ b/backend/app/controllers/posts_controller.rb
@@ -141,10 +141,6 @@ class PostsController < ApplicationController
     end
   end
 
-  # DELETE /posts/1
-  def destroy
-  end
-
   def changes
     id = params[:id]
     page = (params[:page].presence || 1).to_i
diff --git a/backend/app/controllers/settings_controller.rb b/backend/app/controllers/settings_controller.rb
deleted file mode 100644
index 379ca82..0000000
--- a/backend/app/controllers/settings_controller.rb
+++ /dev/null
@@ -1,16 +0,0 @@
-class SettingsController < 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/tags_controller.rb b/backend/app/controllers/tags_controller.rb
index 6597a43..7c1b250 100644
--- a/backend/app/controllers/tags_controller.rb
+++ b/backend/app/controllers/tags_controller.rb
@@ -34,13 +34,4 @@ class TagsController < ApplicationController
       head :not_found
     end
   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..c7afe8f 100644
--- a/backend/config/routes.rb
+++ b/backend/config/routes.rb
@@ -1,7 +1,7 @@
 Rails.application.routes.draw do
   resources :nico_tags, path: 'tags/nico', only: [:index, :update]
 
-  resources :tags do
+  resources :tags, only: [:index, :show] do
     collection do
       get :autocomplete
       get 'name/:name', action: :show_by_name
@@ -30,7 +30,7 @@ Rails.application.routes.draw do
     end
   end
 
-  resources :posts do
+  resources :posts, only: [:index, :show, :create, :update] do
     collection do
       get :random
       get :changes
@@ -49,12 +49,4 @@ Rails.application.routes.draw do
       post 'code/renew', action: :renew
     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