diff --git a/.github/workflows/build_docker_image.yml b/.github/workflows/build_docker_image.yml
index b183e899..077c1526 100644
--- a/.github/workflows/build_docker_image.yml
+++ b/.github/workflows/build_docker_image.yml
@@ -2,12 +2,6 @@ name: (GitHub Actions) Build Docker Image
 
 on:
   push:
-    branches:
-      - main
-      - development
-  pull_request:
-    branches:
-      - development
 
 jobs:
   build:
diff --git a/.github/workflows/build_docker_image_for_railway.yml b/.github/workflows/build_docker_image_for_railway.yml
index 1622359a..5c87b212 100644
--- a/.github/workflows/build_docker_image_for_railway.yml
+++ b/.github/workflows/build_docker_image_for_railway.yml
@@ -2,12 +2,6 @@ name: (GitHub Actions) Build Docker Image for Railway
 
 on:
   push:
-    branches:
-      - main
-      - development
-  pull_request:
-    branches:
-      - development
 
 jobs:
   build:
diff --git a/.github/workflows/build_nextjs_and_deploy_to_railway.yml b/.github/workflows/build_nextjs_and_deploy_to_railway.yml
index 97d01d4f..440e0754 100644
--- a/.github/workflows/build_nextjs_and_deploy_to_railway.yml
+++ b/.github/workflows/build_nextjs_and_deploy_to_railway.yml
@@ -5,16 +5,13 @@ on:
     branches:
       - main
       - development
-  pull_request:
-    branches:
-      - development
 
 jobs:
   build:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [16.x, 18.x]
+        node-version: [18.x]
     steps:
     - uses: actions/checkout@v3
     - name: Use Node.js ${{ matrix.node-version }}
diff --git a/.github/workflows/cypress.yml b/.github/workflows/cypress.yml
index 357e0044..5c8aacd5 100644
--- a/.github/workflows/cypress.yml
+++ b/.github/workflows/cypress.yml
@@ -2,13 +2,6 @@ name: (GitHub Actions) Cypress
 
 on:
   push:
-    branches:
-      - main
-      - development
-  pull_request:
-    branches:
-      - main
-      - development
 
 jobs:
   cypress_gss2022_frontend:
diff --git a/.github/workflows/node.js.yml b/.github/workflows/node.js.yml
index 4c6c2666..741218ba 100644
--- a/.github/workflows/node.js.yml
+++ b/.github/workflows/node.js.yml
@@ -2,12 +2,6 @@ name: (GitHub Actions) Node.js CI
 
 on:
   push:
-    branches:
-      - main
-      - development
-  pull_request:
-    branches:
-      - development
   workflow_dispatch:
 
 jobs:
@@ -15,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [16.x, 18.x]
+        node-version: [18.x]
     steps:
     - uses: actions/checkout@v3
     - name: Use Node.js ${{ matrix.node-version }}
diff --git a/components/Departments.tsx b/components/Departments.tsx
index d4929713..4e3218e8 100644
--- a/components/Departments.tsx
+++ b/components/Departments.tsx
@@ -14,7 +14,7 @@ const Departments: NextPage = () => {
             </h1>
 
             <div>
-              <div className="text-base text-left pb-0">
+              <div className="text-base text-left pb-4">
                 <ul className="list-disc pl-6 pr-2">
                   <li className="pb-2">
                     {locale === 'ja'
@@ -29,9 +29,7 @@ const Departments: NextPage = () => {
                 </ul>
               </div>
 
-              <div className="pl-10 pr-10 divider" />
-
-              <div className="pb-0">
+              <div className="pb-4">
                 <h2 className="text-xl font-bold pb-4">
                   {locale === 'ja'
                     ? '①オールキャラ部門'
@@ -43,7 +41,7 @@ const Departments: NextPage = () => {
                     : 'In this division, vote for your favorite characters.'}
                 </p>
                 <div className="pb-4">
-                  <h3 className="text-lg font-bold pb-2">
+                  <h3 className="text-lg font-bold">
                     {locale === 'ja' ? '投票数' : 'Number of votes'}
                   </h3>
                   {locale === 'ja' ? (
@@ -91,7 +89,7 @@ const Departments: NextPage = () => {
                   </div>
                 </div>
                 <div className="pb-4">
-                  <h3 className="text-lg font-bold pb-2">
+                  <h3 className="text-lg font-bold">
                     {locale === 'ja'
                       ? '投票用ハッシュタグ'
                       : 'Hashtag to use for voting'}
@@ -109,50 +107,14 @@ const Departments: NextPage = () => {
                 </div>
               </div>
 
-              <div className="pl-10 pr-10 divider" />
-
               <h2 className="text-xl font-bold pb-4">
-                {locale === 'ja' ? '②コンビ部門' : '(2) Combination division'}
+                {locale === 'ja'
+                  ? '②？？？部門（近日発表！）'
+                  : '(2) ??? division (Reveal soon!)'}
               </h2>
               <p className="text-base text-center pb-4">
-                {locale === 'ja'
-                  ? '好きなキャラのコンビ（2人組）に投票する部門です。'
-                  : '好きなキャラのコンビ（2人組）に投票する部門です。'}
+                {locale === 'ja' ? '？？？' : '???'}
               </p>
-
-              <div className="pb-4">
-                <h3 className="text-lg font-bold pb-2">
-                  {locale === 'ja' ? '投票数' : 'Number of votes'}
-                </h3>
-                {locale === 'ja' ? (
-                  <p className="text-lg pb-4">
-                    お一人様 <span className="text-red-500">1票</span> まで
-                  </p>
-                ) : (
-                  <p className="text-lg pb-4">
-                    1 person has up to{' '}
-                    <span className="text-red-500">1 votes</span>
-                  </p>
-                )}
-              </div>
-              <div className="pb-4">
-                <h3 className="text-lg font-bold pb-2">
-                  {locale === 'ja'
-                    ? '投票用ハッシュタグ'
-                    : 'Hashtag to use for voting'}
-                </h3>
-                <p className="text-lg">
-                  {' '}
-                  <a
-                    href="https://twitter.com/search?q=%23%E5%B9%BB%E6%B0%B4%E7%B7%8F%E9%81%B8%E6%8C%992022%E3%82%B3%E3%83%B3%E3%83%93%E9%83%A8%E9%96%80&src=typed_query&f=live"
-                    target="_blank"
-                    rel="noreferrer"
-                    className="underline underline-offset-2 text-blue-500 hover:text-blue-900"
-                  >
-                    #幻水総選挙2022コンビ部門
-                  </a>
-                </p>
-              </div>
             </div>
           </div>
         </div>
diff --git a/components/VoteExamples.tsx b/components/VoteExamples.tsx
index afd4444a..198cc4e3 100644
--- a/components/VoteExamples.tsx
+++ b/components/VoteExamples.tsx
@@ -38,38 +38,13 @@ const VoteExamples: NextPage = () => {
               />
             </div>
 
-            <div className="text-base text-center pb-6">
-              <h2 className="text-xl font-bold pb-4">コンビ部門 投票例①</h2>
-              <Image
-                src="/vote_example_combination_01.png"
-                alt="コンビ部門 投票例 01"
-                width={1182}
-                height={318}
-              />
-            </div>
-
-            <div className="text-base text-center pb-6">
-              <h2 className="text-xl font-bold pb-4">コンビ部門 投票例②</h2>
-              <Image
-                src="/vote_example_combination_02.png"
-                alt="コンビ部門 投票例 02"
-                width={1180}
-                height={370}
-              />
-            </div>
-
             <div className="text-base text-left pb-0">
               <div className="text-base text-left pb-4">
                 ハッシュタグの前には半角スペースまたは改行が必要です。
                 <br />
-                キャラやコンビがしっかりと判別できれば、書式は問いません。
+                キャラがしっかりと判別できれば、書式は問いません。
               </div>
               <ul className="list-disc pl-6 pr-2">
-                <li className="pb-2">
-                  <span className="text-red-500">
-                    オールキャラ部門とコンビ部門は、それぞれ別のツイートで投票してください。
-                  </span>
-                </li>
                 <li className="pb-2">
                   愛称を使わずキャラクター名で投票してください。
                   <br />
diff --git a/public/vote_example_combination_01.png b/public/vote_example_combination_01.png
deleted file mode 100644
index 6ccfccc5..00000000
Binary files a/public/vote_example_combination_01.png and /dev/null differ
diff --git a/public/vote_example_combination_02.png b/public/vote_example_combination_02.png
deleted file mode 100644
index ec6f4f03..00000000
Binary files a/public/vote_example_combination_02.png and /dev/null differ