diff --git a/locales/en-US.yml b/locales/en-US.yml
index c6c442df7..b7248e033 100644
--- a/locales/en-US.yml
+++ b/locales/en-US.yml
@@ -1114,6 +1114,9 @@ isPatron: "Calckey Patron"
 reactionPickerSkinTone: "Preferred emoji skin tone"
 enableServerMachineStats: "Enable server hardware statistics"
 enableIdenticonGeneration: "Enable Identicon generation"
+showPopup: "Notify users with popup"
+showWithSparkles: "Show with sparkles"
+youHaveUnreadAnnouncements: "You have unread announcements"
 
 _sensitiveMediaDetection:
   description: "Reduces the effort of server moderation through automatically recognizing
diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index 05c4f3ab3..95fb7bcf8 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -980,6 +980,9 @@ preventAiLearningDescription: "投稿したノート、添付した画像など
 noGraze: "ブラウザの拡張機能「Graze for Mastodon」は、Calckeyの動作を妨げるため、無効にしてください。"
 enableServerMachineStats: "サーバーのマシン情報を公開する"
 enableIdenticonGeneration: "ユーザーごとのIdenticon生成を有効にする"
+showPopup: "ポップアップを表示してユーザーに知らせる"
+showWithSparkles: "タイトルをキラキラさせる"
+youHaveUnreadAnnouncements: "未読のお知らせがあります"
 
 _sensitiveMediaDetection:
   description: "機械学習を使って自動でセンシティブなメディアを検出し、モデレーションに役立てられます。サーバーの負荷が少し増えます。"
diff --git a/packages/backend/migration/1688845537045-announcement-popup.js b/packages/backend/migration/1688845537045-announcement-popup.js
new file mode 100644
index 000000000..196590d3e
--- /dev/null
+++ b/packages/backend/migration/1688845537045-announcement-popup.js
@@ -0,0 +1,21 @@
+export class AnnouncementPopup1688845537045 {
+	name = "AnnouncementPopup1688845537045";
+
+	async up(queryRunner) {
+		await queryRunner.query(
+			`ALTER TABLE "announcement" ADD "showPopup" boolean NOT NULL DEFAULT false`,
+		);
+		await queryRunner.query(
+			`ALTER TABLE "announcement" ADD "isGoodNews" boolean NOT NULL DEFAULT false`,
+		);
+	}
+
+	async down(queryRunner) {
+		await queryRunner.query(
+			`ALTER TABLE "announcement" DROP COLUMN "isGoodNews"`,
+		);
+		await queryRunner.query(
+			`ALTER TABLE "announcement" DROP COLUMN "showPopup"`,
+		);
+	}
+}
diff --git a/packages/backend/src/models/entities/announcement.ts b/packages/backend/src/models/entities/announcement.ts
index 1939604b9..7872c0fe1 100644
--- a/packages/backend/src/models/entities/announcement.ts
+++ b/packages/backend/src/models/entities/announcement.ts
@@ -36,6 +36,16 @@ export class Announcement {
 	})
 	public imageUrl: string | null;
 
+	@Column("boolean", {
+		default: false,
+	})
+	public showPopup: boolean;
+
+	@Column("boolean", {
+		default: false,
+	})
+	public isGoodNews: boolean;
+
 	constructor(data: Partial<Announcement>) {
 		if (data == null) return;
 
diff --git a/packages/backend/src/server/api/endpoints/admin/announcements/create.ts b/packages/backend/src/server/api/endpoints/admin/announcements/create.ts
index a532b6677..754cc6c89 100644
--- a/packages/backend/src/server/api/endpoints/admin/announcements/create.ts
+++ b/packages/backend/src/server/api/endpoints/admin/announcements/create.ts
@@ -47,6 +47,16 @@ export const meta = {
 				optional: false,
 				nullable: true,
 			},
+			showPopup: {
+				type: "boolean",
+				optional: true,
+				nullable: false,
+			},
+			isGoodNews: {
+				type: "boolean",
+				optional: true,
+				nullable: false,
+			},
 		},
 	},
 } as const;
@@ -57,6 +67,8 @@ export const paramDef = {
 		title: { type: "string", minLength: 1 },
 		text: { type: "string", minLength: 1 },
 		imageUrl: { type: "string", nullable: true, minLength: 1 },
+		showPopup: { type: "boolean" },
+		isGoodNews: { type: "boolean" },
 	},
 	required: ["title", "text", "imageUrl"],
 } as const;
@@ -69,6 +81,8 @@ export default define(meta, paramDef, async (ps) => {
 		title: ps.title,
 		text: ps.text,
 		imageUrl: ps.imageUrl,
+		showPopup: ps.showPopup ?? false,
+		isGoodNews: ps.isGoodNews ?? false,
 	}).then((x) => Announcements.findOneByOrFail(x.identifiers[0]));
 
 	return Object.assign({}, announcement, {
diff --git a/packages/backend/src/server/api/endpoints/admin/announcements/list.ts b/packages/backend/src/server/api/endpoints/admin/announcements/list.ts
index fc5b02070..e96517c68 100644
--- a/packages/backend/src/server/api/endpoints/admin/announcements/list.ts
+++ b/packages/backend/src/server/api/endpoints/admin/announcements/list.ts
@@ -57,6 +57,16 @@ export const meta = {
 					optional: false,
 					nullable: false,
 				},
+				showPopup: {
+					type: "boolean",
+					optional: true,
+					nullable: false,
+				},
+				isGoodNews: {
+					type: "boolean",
+					optional: true,
+					nullable: false,
+				},
 			},
 		},
 	},
@@ -100,5 +110,7 @@ export default define(meta, paramDef, async (ps) => {
 		text: announcement.text,
 		imageUrl: announcement.imageUrl,
 		reads: reads.get(announcement)!,
+		showPopup: announcement.showPopup,
+		isGoodNews: announcement.isGoodNews,
 	}));
 });
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 35e64f281..616b94d69 100644
--- a/packages/backend/src/server/api/endpoints/admin/announcements/update.ts
+++ b/packages/backend/src/server/api/endpoints/admin/announcements/update.ts
@@ -24,6 +24,8 @@ export const paramDef = {
 		title: { type: "string", minLength: 1 },
 		text: { type: "string", minLength: 1 },
 		imageUrl: { type: "string", nullable: true, minLength: 1 },
+		showPopup: { type: "boolean" },
+		isGoodNews: { type: "boolean" },
 	},
 	required: ["id", "title", "text", "imageUrl"],
 } as const;
@@ -38,5 +40,7 @@ export default define(meta, paramDef, async (ps, me) => {
 		title: ps.title,
 		text: ps.text,
 		imageUrl: ps.imageUrl,
+		showPopup: ps.showPopup ?? false,
+		isGoodNews: ps.isGoodNews ?? false,
 	});
 });
diff --git a/packages/backend/src/server/api/endpoints/announcements.ts b/packages/backend/src/server/api/endpoints/announcements.ts
index 00634cc42..1bab61ba2 100644
--- a/packages/backend/src/server/api/endpoints/announcements.ts
+++ b/packages/backend/src/server/api/endpoints/announcements.ts
@@ -56,6 +56,16 @@ export const meta = {
 					optional: true,
 					nullable: false,
 				},
+				showPopup: {
+					type: "boolean",
+					optional: false,
+					nullable: false,
+				},
+				isGoodNews: {
+					type: "boolean",
+					optional: false,
+					nullable: false,
+				},
 			},
 		},
 	},
diff --git a/packages/client/src/components/MkAnnouncement.vue b/packages/client/src/components/MkAnnouncement.vue
new file mode 100644
index 000000000..24bf886dd
--- /dev/null
+++ b/packages/client/src/components/MkAnnouncement.vue
@@ -0,0 +1,74 @@
+<template>
+	<MkModal ref="modal" :z-priority="'middle'" @closed="$emit('closed')">
+		<div :class="$style.root">
+			<div :class="$style.title">
+				<MkSparkle v-if="isGoodNews">{{ title }}</MkSparkle>
+				<p v-else>{{ title }}</p>
+			</div>
+			<Mfm :text="text" />
+			<img
+				v-if="imageUrl != null"
+				:key="imageUrl"
+				:src="imageUrl"
+				alt="attached image"
+			/>
+			<MkButton :class="$style.gotIt" primary full @click="gotIt()">{{
+				i18n.ts.gotIt
+			}}</MkButton>
+		</div>
+	</MkModal>
+</template>
+
+<script lang="ts" setup>
+import { shallowRef } from "vue";
+import MkModal from "@/components/MkModal.vue";
+import MkSparkle from "@/components/MkSparkle.vue";
+import MkButton from "@/components/MkButton.vue";
+import { i18n } from "@/i18n";
+import * as os from "@/os";
+
+const props = defineProps<{
+	announcement: Announcement;
+}>();
+
+const { id, text, title, imageUrl, isGoodNews } = props.announcement;
+
+const modal = shallowRef<InstanceType<typeof MkModal>>();
+
+const gotIt = () => {
+	modal.value.close();
+	os.api("i/read-announcement", { announcementId: id });
+};
+</script>
+
+<style lang="scss" module>
+.root {
+	margin: auto;
+	position: relative;
+	padding: 32px;
+	min-width: 320px;
+	max-width: 480px;
+	box-sizing: border-box;
+	text-align: center;
+	background: var(--panel);
+	border-radius: var(--radius);
+
+	> img {
+		border-radius: 10px;
+		max-height: 100%;
+		max-width: 100%;
+	}
+}
+
+.title {
+	font-weight: bold;
+
+	> p {
+		margin: 0;
+	}
+}
+
+.gotIt {
+	margin: 8px 0 0 0;
+}
+</style>
diff --git a/packages/client/src/components/MkManyAnnouncements.vue b/packages/client/src/components/MkManyAnnouncements.vue
new file mode 100644
index 000000000..5c8b225de
--- /dev/null
+++ b/packages/client/src/components/MkManyAnnouncements.vue
@@ -0,0 +1,53 @@
+<template>
+	<MkModal ref="modal" :z-priority="'middle'" @closed="$emit('closed')">
+		<div :class="$style.root">
+			<p :class="$style.title">
+				{{ i18n.ts.youHaveUnreadAnnouncements }}
+			</p>
+			<MkButton
+				:class="$style.gotIt"
+				primary
+				full
+				@click="checkAnnouncements()"
+				>{{ i18n.ts.gotIt }}</MkButton
+			>
+		</div>
+	</MkModal>
+</template>
+
+<script lang="ts" setup>
+import { shallowRef } from "vue";
+import MkModal from "@/components/MkModal.vue";
+import MkButton from "@/components/MkButton.vue";
+import { i18n } from "@/i18n";
+import * as os from "@/os";
+
+const modal = shallowRef<InstanceType<typeof MkModal>>();
+const checkAnnouncements = () => {
+	modal.value.close();
+	location.href = "/announcements";
+};
+</script>
+
+<style lang="scss" module>
+.root {
+	margin: auto;
+	position: relative;
+	padding: 32px;
+	min-width: 320px;
+	max-width: 480px;
+	box-sizing: border-box;
+	text-align: center;
+	background: var(--panel);
+	border-radius: var(--radius);
+}
+
+.title {
+	font-weight: bold;
+	margin: 0;
+}
+
+.gotIt {
+	margin: 8px 0 0 0;
+}
+</style>
diff --git a/packages/client/src/init.ts b/packages/client/src/init.ts
index 1c68b87c9..11b9a2eda 100644
--- a/packages/client/src/init.ts
+++ b/packages/client/src/init.ts
@@ -36,7 +36,7 @@ import { version, ui, lang, host } from "@/config";
 import { applyTheme } from "@/scripts/theme";
 import { isDeviceDarkmode } from "@/scripts/is-device-darkmode";
 import { i18n } from "@/i18n";
-import { confirm, alert, post, popup, toast } from "@/os";
+import { confirm, alert, post, popup, toast, api } from "@/os";
 import { stream } from "@/stream";
 import * as sound from "@/scripts/sound";
 import { $i, refreshAccount, login, updateAccount, signout } from "@/account";
@@ -272,6 +272,42 @@ function checkForSplash() {
 		}
 	}
 
+	if (
+		$i &&
+		defaultStore.state.tutorial === -1 &&
+		!["/announcements", "/announcements/"].includes(window.location.pathname)
+	) {
+		api("announcements", { withUnreads: true, limit: 10 })
+			.then((announcements) => {
+				const unreadAnnouncements = announcements.filter((item) => {
+					return !item.isRead;
+				});
+				if (unreadAnnouncements.length > 3) {
+					popup(
+						defineAsyncComponent(
+							() => import("@/components/MkManyAnnouncements.vue"),
+						),
+						{},
+						{},
+						"closed",
+					);
+				} else {
+					unreadAnnouncements.forEach((item) => {
+						if (item.showPopup)
+							popup(
+								defineAsyncComponent(
+									() => import("@/components/MkAnnouncement.vue"),
+								),
+								{ announcement: item },
+								{},
+								"closed",
+							);
+					});
+				}
+			})
+			.catch((err) => console.log(err));
+	}
+
 	// NOTE: この処理は必ず↑のクライアント更新時処理より後に来ること(テーマ再構築のため)
 	watch(
 		defaultStore.reactiveState.darkMode,
diff --git a/packages/client/src/pages/admin/announcements.vue b/packages/client/src/pages/admin/announcements.vue
index 9853158de..b2172b307 100644
--- a/packages/client/src/pages/admin/announcements.vue
+++ b/packages/client/src/pages/admin/announcements.vue
@@ -7,7 +7,7 @@
 				:display-back-button="true"
 		/></template>
 		<MkSpacer :content-max="900">
-			<div class="ztgjmzrw">
+			<div :class="$style.root">
 				<section
 					v-for="announcement in announcements"
 					class="_card _gap announcements"
@@ -22,6 +22,17 @@
 						<MkInput v-model="announcement.imageUrl">
 							<template #label>{{ i18n.ts.imageUrl }}</template>
 						</MkInput>
+						<MkSwitch
+							v-model="announcement.showPopup"
+							class="_formBlock"
+							>{{ i18n.ts.showPopup }}</MkSwitch
+						>
+						<MkSwitch
+							v-if="announcement.showPopup"
+							v-model="announcement.isGoodNews"
+							class="_formBlock"
+							>{{ i18n.ts.showWithSparkles }}</MkSwitch
+						>
 						<p v-if="announcement.reads">
 							{{
 								i18n.t("nUsersRead", { n: announcement.reads })
@@ -57,6 +68,7 @@
 import {} from "vue";
 import MkButton from "@/components/MkButton.vue";
 import MkInput from "@/components/form/input.vue";
+import MkSwitch from "@/components/form/switch.vue";
 import MkTextarea from "@/components/form/textarea.vue";
 import * as os from "@/os";
 import { i18n } from "@/i18n";
@@ -74,6 +86,8 @@ function add() {
 		title: "",
 		text: "",
 		imageUrl: null,
+		showPopup: false,
+		isGoodNews: false,
 	});
 }
 
@@ -137,8 +151,8 @@ definePageMetadata({
 });
 </script>
 
-<style lang="scss" scoped>
-.ztgjmzrw {
+<style lang="scss" module>
+.root {
 	margin: var(--margin);
 }
 </style>