diff --git a/CHANGELOG.md b/CHANGELOG.md
index adc8d2d450..898c474883 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,7 @@
 ### Client
 - Feat: チャットウィジェットを追加
 - Feat: デッキにチャットカラムを追加
+- Enhance: Unicode絵文字をslugから入力する際に`:ok:`のように最後の`:`を入力したあとにUnicode絵文字に変換できるように
 - Enhance: テーマでページヘッダーの色を変更できるように
 - Enhance: デザインのブラッシュアップ
 - Fix: ログアウトした際に処理が終了しない問題を修正
diff --git a/packages/frontend/src/components/MkAutocomplete.vue b/packages/frontend/src/components/MkAutocomplete.vue
index e51a56fa7b..e5b9533cd7 100644
--- a/packages/frontend/src/components/MkAutocomplete.vue
+++ b/packages/frontend/src/components/MkAutocomplete.vue
@@ -15,12 +15,12 @@ SPDX-License-Identifier: AGPL-3.0-only
 		</li>
 		<li tabindex="-1" :class="$style.item" @click="chooseUser()" @keydown="onKeydown">{{ i18n.ts.selectUser }}</li>
 	</ol>
-	<ol v-else-if="hashtags.length > 0" ref="suggests" :class="$style.list">
+	<ol v-else-if="type === 'hashtag' && hashtags.length > 0" ref="suggests" :class="$style.list">
 		<li v-for="hashtag in hashtags" tabindex="-1" :class="$style.item" @click="complete(type, hashtag)" @keydown="onKeydown">
 			<span class="name">{{ hashtag }}</span>
 		</li>
 	</ol>
-	<ol v-else-if="emojis.length > 0" ref="suggests" :class="$style.list">
+	<ol v-else-if="type === 'emoji' || type === 'emojiComplete' && emojis.length > 0" ref="suggests" :class="$style.list">
 		<li v-for="emoji in emojis" :key="emoji.emoji" :class="$style.item" tabindex="-1" @click="complete(type, emoji.emoji)" @keydown="onKeydown">
 			<MkCustomEmoji v-if="'isCustomEmoji' in emoji && emoji.isCustomEmoji" :name="emoji.emoji" :class="$style.emoji" :fallbackToImage="true"/>
 			<MkEmoji v-else :emoji="emoji.emoji" :class="$style.emoji"/>
@@ -30,12 +30,12 @@ SPDX-License-Identifier: AGPL-3.0-only
 			<span v-if="emoji.aliasOf" :class="$style.emojiAlias">({{ emoji.aliasOf }})</span>
 		</li>
 	</ol>
-	<ol v-else-if="mfmTags.length > 0" ref="suggests" :class="$style.list">
+	<ol v-else-if="type === 'mfmTag' && mfmTags.length > 0" ref="suggests" :class="$style.list">
 		<li v-for="tag in mfmTags" tabindex="-1" :class="$style.item" @click="complete(type, tag)" @keydown="onKeydown">
 			<span>{{ tag }}</span>
 		</li>
 	</ol>
-	<ol v-else-if="mfmParams.length > 0" ref="suggests" :class="$style.list">
+	<ol v-else-if="type === 'mfmParam' && mfmParams.length > 0" ref="suggests" :class="$style.list">
 		<li v-for="param in mfmParams" tabindex="-1" :class="$style.item" @click="complete(type, q.params.toSpliced(-1, 1, param).join(','))" @keydown="onKeydown">
 			<span>{{ param }}</span>
 		</li>
@@ -58,12 +58,44 @@ import { store } from '@/store.js';
 import { i18n } from '@/i18n.js';
 import { miLocalStorage } from '@/local-storage.js';
 import { customEmojis } from '@/custom-emojis.js';
-import { searchEmoji } from '@/utility/search-emoji.js';
+import { searchEmoji, searchEmojiExact } from '@/utility/search-emoji.js';
 import { prefer } from '@/preferences.js';
 
+export type CompleteInfo = {
+	user: {
+		payload: any;
+		query: string | null;
+	},
+	hashtag: {
+		payload: string;
+		query: string;
+	},
+	// `:emo` -> `:emoji:` or some unicode emoji
+	emoji: {
+		payload: string;
+		query: string;
+	},
+	// like emoji but for `:emoji:` -> unicode emoji
+	emojiComplete: {
+		payload: string;
+		query: string;
+	},
+	mfmTag: {
+		payload: string;
+		query: string;
+	},
+	mfmParam: {
+		payload: string;
+		query: {
+			tag: string;
+			params: string[];
+		};
+	},
+};
+
 const lib = emojilist.filter(x => x.category !== 'flags');
 
-const emojiDb = computed(() => {
+const unicodeEmojiDB = computed(() => {
 	//#region Unicode Emoji
 	const char2path = prefer.r.emojiStyle.value === 'twemoji' ? char2twemojiFilePath : char2fluentEmojiFilePath;
 
@@ -87,6 +119,12 @@ const emojiDb = computed(() => {
 	}
 
 	unicodeEmojiDB.sort((a, b) => a.name.length - b.name.length);
+
+	return unicodeEmojiDB;
+});
+
+const emojiDb = computed(() => {
+	//#region Unicode Emoji
 	//#endregion
 
 	//#region Custom Emoji
@@ -114,7 +152,7 @@ const emojiDb = computed(() => {
 	customEmojiDB.sort((a, b) => a.name.length - b.name.length);
 	//#endregion
 
-	return markRaw([...customEmojiDB, ...unicodeEmojiDB]);
+	return markRaw([...customEmojiDB, ...unicodeEmojiDB.value]);
 });
 
 export default {
@@ -123,18 +161,23 @@ export default {
 };
 </script>
 
-<script lang="ts" setup>
-const props = defineProps<{
-	type: string;
-	q: any;
-	textarea: HTMLTextAreaElement;
+<script lang="ts" setup generic="T extends keyof CompleteInfo">
+type PropsType<T extends keyof CompleteInfo> = {
+	type: T;
+	q: CompleteInfo[T]['query'];
+	// なぜかわからないけど HTMLTextAreaElement | HTMLInputElement だと addEventListener/removeEventListenerがエラー
+	textarea: (HTMLTextAreaElement | HTMLInputElement) & HTMLElement;
 	close: () => void;
 	x: number;
 	y: number;
-}>();
+};
+//const props = defineProps<PropsType<keyof CompleteInfo>>();
+// ↑と同じだけど↓にしないとdiscriminated unionにならない。
+// https://www.typescriptlang.org/docs/handbook/typescript-in-5-minutes-func.html#discriminated-unions
+const props = defineProps<PropsType<'user'> | PropsType<'hashtag'> | PropsType<'emoji'> | PropsType<'emojiComplete'> | PropsType<'mfmTag'> | PropsType<'mfmParam'>>();
 
 const emit = defineEmits<{
-	(event: 'done', value: { type: string; value: any }): void;
+	<T extends keyof CompleteInfo>(event: 'done', value: { type: T; value: CompleteInfo[T]['payload'] }): void;
 	(event: 'closed'): void;
 }>();
 
@@ -151,10 +194,10 @@ const mfmParams = ref<string[]>([]);
 const select = ref(-1);
 const zIndex = os.claimZIndex('high');
 
-function complete(type: string, value: any) {
+function complete<T extends keyof CompleteInfo>(type: T, value: CompleteInfo[T]['payload']) {
 	emit('done', { type, value });
 	emit('closed');
-	if (type === 'emoji') {
+	if (type === 'emoji' || type === 'emojiComplete') {
 		let recents = store.s.recentlyUsedEmojis;
 		recents = recents.filter((emoji: any) => emoji !== value);
 		recents.unshift(value);
@@ -243,6 +286,8 @@ function exec() {
 		}
 
 		emojis.value = searchEmoji(props.q, emojiDb.value);
+	} else if (props.type === 'emojiComplete') {
+		emojis.value = searchEmojiExact(props.q, unicodeEmojiDB.value);
 	} else if (props.type === 'mfmTag') {
 		if (!props.q || props.q === '') {
 			mfmTags.value = MFM_TAGS;
diff --git a/packages/frontend/src/utility/autocomplete.ts b/packages/frontend/src/utility/autocomplete.ts
index 9a603b848c..1246c32554 100644
--- a/packages/frontend/src/utility/autocomplete.ts
+++ b/packages/frontend/src/utility/autocomplete.ts
@@ -7,6 +7,7 @@ import { nextTick, ref, defineAsyncComponent } from 'vue';
 import getCaretCoordinates from 'textarea-caret';
 import { toASCII } from 'punycode.js';
 import type { Ref } from 'vue';
+import type { CompleteInfo } from '@/components/MkAutocomplete.vue';
 import { popup } from '@/os.js';
 
 export type SuggestionType = 'user' | 'hashtag' | 'emoji' | 'mfmTag' | 'mfmParam';
@@ -19,7 +20,7 @@ export class Autocomplete {
 		close: () => void;
 	} | null;
 	private textarea: HTMLInputElement | HTMLTextAreaElement;
-	private currentType: string;
+	private currentType: keyof CompleteInfo | undefined;
 	private textRef: Ref<string | number | null>;
 	private opening: boolean;
 	private onlyType: SuggestionType[];
@@ -74,7 +75,7 @@ export class Autocomplete {
 	 * テキスト入力時
 	 */
 	private onInput() {
-		const caretPos = this.textarea.selectionStart;
+		const caretPos = Number(this.textarea.selectionStart);
 		const text = this.text.substring(0, caretPos).split('\n').pop()!;
 
 		const mentionIndex = text.lastIndexOf('@');
@@ -101,6 +102,8 @@ export class Autocomplete {
 		const isMfmParam = mfmParamIndex !== -1 && afterLastMfmParam?.includes('.') && !afterLastMfmParam.includes(' ');
 		const isMfmTag = mfmTagIndex !== -1 && !isMfmParam;
 		const isEmoji = emojiIndex !== -1 && text.split(/:[a-z0-9_+\-]+:/).pop()!.includes(':');
+		// :ok:などを🆗にするたいおぷ
+		const isEmojiCompleteToUnicode = !isEmoji && emojiIndex === text.length - 1;
 
 		let opened = false;
 
@@ -137,6 +140,14 @@ export class Autocomplete {
 			}
 		}
 
+		if (isEmojiCompleteToUnicode && !opened && this.onlyType.includes('emoji')) {
+			const emoji = text.substring(text.lastIndexOf(':', text.length - 2) + 1, text.length - 1);
+			if (!emoji.includes(' ')) {
+				this.open('emojiComplete', emoji);
+				opened = true;
+			}
+		}
+
 		if (isMfmTag && !opened && this.onlyType.includes('mfmTag')) {
 			const mfmTag = text.substring(mfmTagIndex + 1);
 			if (!mfmTag.includes(' ')) {
@@ -164,7 +175,7 @@ export class Autocomplete {
 	/**
 	 * サジェストを提示します。
 	 */
-	private async open(type: string, q: any) {
+	private async open<T extends keyof CompleteInfo>(type: T, q: CompleteInfo[T]['query']) {
 		if (type !== this.currentType) {
 			this.close();
 		}
@@ -231,10 +242,10 @@ export class Autocomplete {
 	/**
 	 * オートコンプリートする
 	 */
-	private complete({ type, value }) {
+	private complete<T extends keyof CompleteInfo>({ type, value }: { type: T; value: CompleteInfo[T]['payload'] }) {
 		this.close();
 
-		const caret = this.textarea.selectionStart;
+		const caret = Number(this.textarea.selectionStart);
 
 		if (type === 'user') {
 			const source = this.text;
@@ -280,6 +291,22 @@ export class Autocomplete {
 			// 挿入
 			this.text = trimmedBefore + value + after;
 
+			// キャレットを戻す
+			nextTick(() => {
+				this.textarea.focus();
+				const pos = trimmedBefore.length + value.length;
+				this.textarea.setSelectionRange(pos, pos);
+			});
+		} else if (type === 'emojiComplete') {
+			const source = this.text;
+
+			const before = source.substring(0, caret);
+			const trimmedBefore = before.substring(0, before.lastIndexOf(':', before.length - 2));
+			const after = source.substring(caret);
+
+			// 挿入
+			this.text = trimmedBefore + value + after;
+
 			// キャレットを戻す
 			nextTick(() => {
 				this.textarea.focus();
diff --git a/packages/frontend/src/utility/search-emoji.ts b/packages/frontend/src/utility/search-emoji.ts
index 371f69b9a7..4cda880bff 100644
--- a/packages/frontend/src/utility/search-emoji.ts
+++ b/packages/frontend/src/utility/search-emoji.ts
@@ -104,3 +104,33 @@ export function searchEmoji(query: string | null, emojiDb: EmojiDef[], max = 30)
 		.slice(0, max)
 		.map(it => it.emoji);
 }
+
+export function searchEmojiExact(query: string | null, emojiDb: EmojiDef[], max = 30): EmojiDef[] {
+	if (!query) {
+		return [];
+	}
+
+	const matched = new Map<string, EmojiScore>();
+	// 完全一致（エイリアスなし）
+	emojiDb.some(x => {
+		if (x.name === query && !x.aliasOf) {
+			matched.set(x.name, { emoji: x, score: query.length + 3 });
+		}
+		return matched.size === max;
+	});
+
+	// 完全一致（エイリアス込み）
+	if (matched.size < max) {
+		emojiDb.some(x => {
+			if (x.name === query && !matched.has(x.aliasOf ?? x.name)) {
+				matched.set(x.aliasOf ?? x.name, { emoji: x, score: query.length + 2 });
+			}
+			return matched.size === max;
+		});
+	}
+
+	return [...matched.values()]
+		.sort((x, y) => y.score - x.score)
+		.slice(0, max)
+		.map(it => it.emoji);
+}