diff --git a/CHANGELOG.md b/CHANGELOG.md
index 53f903c64b..ecbad51e90 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -29,11 +29,17 @@
 - AiScriptを0.13.3に更新
 - Deck UIを使用している場合、`/`以外にアクセスした際にZen UIで表示するように
 	- メインカラムを設置していない場合の問題を解決
+- ハッシュタグのノート一覧ページから、そのハッシュタグで投稿するボタンを追加
+- アカウント初期設定ウィザードに戻るボタンを追加
+- アカウントの初期設定ウィザードにあとでボタンを追加
 - Fix: URLプレビューで情報が取得できなかった際の挙動を修正
 - Fix: Safari、Firefoxでの新規登録時、パスワードマネージャーにメールアドレスが登録されていた挙動を修正
 - fix:ロールタイムラインが無効でも投稿が流れてしまう問題の修正
 - fix:ロールタイムラインにて全ての投稿が流れてしまう問題の修正
 
+### Server
+- Fix: お知らせの画像URLを空にできない問題を修正
+
 ## 13.12.2
 
 ## NOTE
diff --git a/cypress/e2e/basic.cy.js b/cypress/e2e/basic.cy.js
index 2515c14ad6..652e0c2d70 100644
--- a/cypress/e2e/basic.cy.js
+++ b/cypress/e2e/basic.cy.js
@@ -169,20 +169,25 @@ describe('After user signed in', () => {
 		cy.get('[data-cy-user-setup-user-description] textarea').type('ほげ');
 		// TODO: アイコン設定テスト
 
+		cy.get('[data-cy-user-setup-back]').click();
 		cy.get('[data-cy-user-setup-continue]').click();
 
 		// プライバシー設定
 
+		cy.get('[data-cy-user-setup-back]').click();
 		cy.get('[data-cy-user-setup-continue]').click();
 
 		// フォローはスキップ
 
+		cy.get('[data-cy-user-setup-back]').click();
 		cy.get('[data-cy-user-setup-continue]').click();
 
 		// プッシュ通知設定はスキップ
 
+		cy.get('[data-cy-user-setup-back]').click();
 		cy.get('[data-cy-user-setup-continue]').click();
 
+		cy.get('[data-cy-user-setup-back]').click();
 		cy.get('[data-cy-user-setup-continue]').click();
   });
 });
diff --git a/locales/index.d.ts b/locales/index.d.ts
index e4bf6628cc..a54268676e 100644
--- a/locales/index.d.ts
+++ b/locales/index.d.ts
@@ -795,6 +795,7 @@ export interface Locale {
     "noBotProtectionWarning": string;
     "configure": string;
     "postToGallery": string;
+    "postToHashtag": string;
     "gallery": string;
     "recentPosts": string;
     "popularPosts": string;
@@ -1060,6 +1061,7 @@ export interface Locale {
     "rolesThatCanBeUsedThisEmojiAsReactionPublicRoleWarn": string;
     "cancelReactionConfirm": string;
     "changeReactionConfirm": string;
+    "later": string;
     "goToMisskey": string;
     "_initialAccountSetting": {
         "accountCreated": string;
@@ -1075,6 +1077,7 @@ export interface Locale {
         "haveFun": string;
         "ifYouNeedLearnMore": string;
         "skipAreYouSure": string;
+        "laterAreYouSure": string;
     };
     "_serverRules": {
         "description": string;
diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index 4f400ab60a..0ca37caa58 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -792,6 +792,7 @@ noMaintainerInformationWarning: "管理者情報が設定されていません
 noBotProtectionWarning: "Botプロテクションが設定されていません。"
 configure: "設定する"
 postToGallery: "ギャラリーへ投稿"
+postToHashtag: "このハッシュタグで投稿"
 gallery: "ギャラリー"
 recentPosts: "最近の投稿"
 popularPosts: "人気の投稿"
@@ -1057,6 +1058,7 @@ rolesThatCanBeUsedThisEmojiAsReactionEmptyDescription: "ロールの指定が一
 rolesThatCanBeUsedThisEmojiAsReactionPublicRoleWarn: "ロールは公開ロールである必要があります。"
 cancelReactionConfirm: "リアクションを取り消しますか？"
 changeReactionConfirm: "リアクションを変更しますか？"
+later: "あとで"
 goToMisskey: "Misskeyへ"
 
 _initialAccountSetting:
@@ -1073,6 +1075,7 @@ _initialAccountSetting:
   haveFun: "{name}をお楽しみください！"
   ifYouNeedLearnMore: "{name}(Misskey)の使い方などを詳しく知るには{link}をご覧ください。"
   skipAreYouSure: "初期設定をスキップしますか？"
+  laterAreYouSure: "初期設定をあとでやり直しますか？"
 
 _serverRules:
   description: "新規登録前に表示する、サーバーの簡潔なルールを設定します。内容は利用規約の要約とすることを推奨します。"
diff --git a/packages/backend/src/server/api/endpoints/admin/announcements/update.ts b/packages/backend/src/server/api/endpoints/admin/announcements/update.ts
index c42f9f8924..442b9c382b 100644
--- a/packages/backend/src/server/api/endpoints/admin/announcements/update.ts
+++ b/packages/backend/src/server/api/endpoints/admin/announcements/update.ts
@@ -21,7 +21,8 @@ export default class extends Endpoint<'admin/announcements/update'> {
 				updatedAt: new Date(),
 				title: ps.title,
 				text: ps.text,
-				imageUrl: ps.imageUrl,
+				/* eslint-disable-next-line @typescript-eslint/prefer-nullish-coalescing -- 空の文字列の場合、nullを渡すようにするため */
+				imageUrl: ps.imageUrl || null, 
 			});
 		});
 	}
diff --git a/packages/frontend/src/components/MkButton.vue b/packages/frontend/src/components/MkButton.vue
index 0ddee34f0a..6de6a4cc70 100644
--- a/packages/frontend/src/components/MkButton.vue
+++ b/packages/frontend/src/components/MkButton.vue
@@ -2,7 +2,7 @@
 <button
 	v-if="!link"
 	ref="el" class="_button"
-	:class="[$style.root, { [$style.inline]: inline, [$style.primary]: primary, [$style.gradate]: gradate, [$style.danger]: danger, [$style.rounded]: rounded, [$style.full]: full, [$style.small]: small, [$style.large]: large, [$style.asLike]: asLike }]"
+	:class="[$style.root, { [$style.inline]: inline, [$style.primary]: primary, [$style.gradate]: gradate, [$style.danger]: danger, [$style.rounded]: rounded, [$style.full]: full, [$style.small]: small, [$style.large]: large, [$style.transparent]: transparent, [$style.asLike]: asLike }]"
 	:type="type"
 	@click="emit('click', $event)"
 	@mousedown="onMousedown"
@@ -14,7 +14,7 @@
 </button>
 <MkA
 	v-else class="_button"
-	:class="[$style.root, { [$style.inline]: inline, [$style.primary]: primary, [$style.gradate]: gradate, [$style.danger]: danger, [$style.rounded]: rounded, [$style.full]: full, [$style.small]: small, [$style.large]: large, [$style.asLike]: asLike }]"
+	:class="[$style.root, { [$style.inline]: inline, [$style.primary]: primary, [$style.gradate]: gradate, [$style.danger]: danger, [$style.rounded]: rounded, [$style.full]: full, [$style.small]: small, [$style.large]: large, [$style.transparent]: transparent, [$style.asLike]: asLike }]"
 	:to="to"
 	@mousedown="onMousedown"
 >
@@ -44,6 +44,7 @@ const props = defineProps<{
 	full?: boolean;
 	small?: boolean;
 	large?: boolean;
+	transparent?: boolean;
 	asLike?: boolean;
 }>();
 
@@ -194,6 +195,10 @@ function onMousedown(evt: MouseEvent): void {
 		}
 	}
 
+	&.transparent {
+		background: transparent;
+	}
+
 	&.gradate {
 		font-weight: bold;
 		color: var(--fgOnAccent) !important;
diff --git a/packages/frontend/src/components/MkUserSetupDialog.vue b/packages/frontend/src/components/MkUserSetupDialog.vue
index 252c2eecce..566441213e 100644
--- a/packages/frontend/src/components/MkUserSetupDialog.vue
+++ b/packages/frontend/src/components/MkUserSetupDialog.vue
@@ -34,6 +34,7 @@
 							<div style="font-size: 120%;">{{ i18n.ts._initialAccountSetting.accountCreated }}</div>
 							<div>{{ i18n.ts._initialAccountSetting.letsStartAccountSetup }}</div>
 							<MkButton primary rounded gradate style="margin: 16px auto 0 auto;" data-cy-user-setup-continue @click="page++">{{ i18n.ts._initialAccountSetting.profileSetting }} <i class="ti ti-arrow-right"></i></MkButton>
+							<MkButton style="margin: 0 auto;" transparent rounded @click="later(true)">{{ i18n.ts.later }}</MkButton>
 						</div>
 					</MkSpacer>
 				</div>
@@ -43,6 +44,7 @@
 					<MkSpacer :marginMin="20" :marginMax="28">
 						<XProfile/>
 						<div class="_buttonsCenter" style="margin-top: 16px;">
+							<MkButton rounded data-cy-user-setup-back @click="page--"><i class="ti ti-arrow-left"></i> {{ i18n.ts.goBack }}</MkButton>
 							<MkButton primary rounded gradate data-cy-user-setup-continue @click="page++">{{ i18n.ts.continue }} <i class="ti ti-arrow-right"></i></MkButton>
 						</div>
 					</MkSpacer>
@@ -53,6 +55,7 @@
 					<MkSpacer :marginMin="20" :marginMax="28">
 						<XPrivacy/>
 						<div class="_buttonsCenter" style="margin-top: 16px;">
+							<MkButton rounded data-cy-user-setup-back @click="page--"><i class="ti ti-arrow-left"></i> {{ i18n.ts.goBack }}</MkButton>
 							<MkButton primary rounded gradate data-cy-user-setup-continue @click="page++">{{ i18n.ts.continue }} <i class="ti ti-arrow-right"></i></MkButton>
 						</div>
 					</MkSpacer>
@@ -64,7 +67,10 @@
 						<XFollow/>
 					</MkSpacer>
 					<div :class="$style.pageFooter">
-						<MkButton primary rounded gradate style="margin: 0 auto;" data-cy-user-setup-continue @click="page++">{{ i18n.ts.continue }} <i class="ti ti-arrow-right"></i></MkButton>
+						<div class="_buttonsCenter">
+							<MkButton rounded data-cy-user-setup-back @click="page--"><i class="ti ti-arrow-left"></i> {{ i18n.ts.goBack }}</MkButton>
+							<MkButton primary rounded gradate style="" data-cy-user-setup-continue @click="page++">{{ i18n.ts.continue }} <i class="ti ti-arrow-right"></i></MkButton>
+						</div>
 					</div>
 				</div>
 			</template>
@@ -76,7 +82,10 @@
 							<div style="font-size: 120%;">{{ i18n.ts.pushNotification }}</div>
 							<div style="padding: 0 16px;">{{ i18n.t('_initialAccountSetting.pushNotificationDescription', { name: instance.name ?? host }) }}</div>
 							<MkPushNotificationAllowButton primary showOnlyToRegister style="margin: 0 auto;"/>
-							<MkButton primary rounded gradate style="margin: 16px auto 0 auto;" data-cy-user-setup-continue @click="page++">{{ i18n.ts.continue }} <i class="ti ti-arrow-right"></i></MkButton>
+							<div class="_buttonsCenter" style="margin-top: 16px;">
+								<MkButton rounded data-cy-user-setup-back @click="page--"><i class="ti ti-arrow-left"></i> {{ i18n.ts.goBack }}</MkButton>
+								<MkButton primary rounded gradate data-cy-user-setup-continue @click="page++">{{ i18n.ts.continue }} <i class="ti ti-arrow-right"></i></MkButton>
+							</div>
 						</div>
 					</MkSpacer>
 				</div>
@@ -95,7 +104,10 @@
 								</template>
 							</I18n>
 							<div>{{ i18n.t('_initialAccountSetting.haveFun', { name: instance.name ?? host }) }}</div>
-							<MkButton primary rounded gradate style="margin: 16px auto 0 auto;" data-cy-user-setup-continue @click="close(false)">{{ i18n.ts.close }}</MkButton>
+							<div class="_buttonsCenter" style="margin-top: 16px;">
+								<MkButton rounded data-cy-user-setup-back @click="page--"><i class="ti ti-arrow-left"></i> {{ i18n.ts.goBack }}</MkButton>
+								<MkButton primary rounded gradate data-cy-user-setup-continue @click="close(false)">{{ i18n.ts.close }}</MkButton>
+							</div>
 						</div>
 					</MkSpacer>
 				</div>
@@ -144,6 +156,19 @@ async function close(skip: boolean) {
 	dialog.value.close();
 	defaultStore.set('accountSetupWizard', -1);
 }
+
+async function later(later: boolean) {
+	if (later) {
+		const { canceled } = await os.confirm({
+			type: 'warning',
+			text: i18n.ts._initialAccountSetting.laterAreYouSure,
+		});
+		if (canceled) return;
+	}
+
+	dialog.value.close();
+	defaultStore.set('accountSetupWizard', 0);
+}
 </script>
 
 <style lang="scss" module>
@@ -190,7 +215,7 @@ async function close(skip: boolean) {
 	left: 0;
 	padding: 12px;
 	border-top: solid 0.5px var(--divider);
-	-webkit-backdrop-filter: var(--blur, blur(15px));
-	backdrop-filter: var(--blur, blur(15px));
+	-webkit-backdrop-filter: blur(15px);
+	backdrop-filter: blur(15px);
 }
 </style>
diff --git a/packages/frontend/src/pages/tag.vue b/packages/frontend/src/pages/tag.vue
index b53db3f67b..104e738866 100644
--- a/packages/frontend/src/pages/tag.vue
+++ b/packages/frontend/src/pages/tag.vue
@@ -2,15 +2,27 @@
 <MkStickyContainer>
 	<template #header><MkPageHeader :actions="headerActions" :tabs="headerTabs"/></template>
 	<MkSpacer :contentMax="800">
-		<MkNotes class="" :pagination="pagination"/>
+		<MkNotes ref="notes" class="" :pagination="pagination"/>
 	</MkSpacer>
+	<template v-if="$i" #footer>
+		<div :class="$style.footer">
+			<MkSpacer :contentMax="800" :marginMin="16" :marginMax="16">
+				<MkButton rounded primary :class="$style.button" @click="post()"><i class="ti ti-pencil"></i>{{ i18n.ts.postToHashtag }}</MkButton>
+			</MkSpacer>
+		</div>
+	</template>
 </MkStickyContainer>
 </template>
 
 <script lang="ts" setup>
-import { computed } from 'vue';
+import { computed, ref } from 'vue';
 import MkNotes from '@/components/MkNotes.vue';
+import MkButton from '@/components/MkButton.vue';
 import { definePageMetadata } from '@/scripts/page-metadata';
+import { i18n } from '@/i18n';
+import { $i } from '@/account';
+import { defaultStore } from '@/store';
+import * as os from '@/os';
 
 const props = defineProps<{
 	tag: string;
@@ -23,6 +35,16 @@ const pagination = {
 		tag: props.tag,
 	})),
 };
+const notes = ref<InstanceType<typeof MkNotes>>();
+
+async function post() {
+	defaultStore.set('postFormHashtags', props.tag);
+	defaultStore.set('postFormWithHashtags', true);
+	await os.post();
+	defaultStore.set('postFormHashtags', '');
+	defaultStore.set('postFormWithHashtags', false);
+	notes.value?.pagingComponent?.reload();
+}
 
 const headerActions = $computed(() => []);
 
@@ -33,3 +55,16 @@ definePageMetadata(computed(() => ({
 	icon: 'ti ti-hash',
 })));
 </script>
+
+<style lang="scss" module>
+.footer {
+	-webkit-backdrop-filter: var(--blur, blur(15px));
+	backdrop-filter: var(--blur, blur(15px));
+	border-top: solid 0.5px var(--divider);
+	display: flex;
+}
+
+.button {
+		margin: 0 auto var(--margin) auto;
+}
+</style>