diff --git a/packages/backend/migration/1707951601000-optimize-emoji-index.js b/packages/backend/migration/1707951601000-optimize-emoji-index.js
new file mode 100644
index 0000000000..e1147673e6
--- /dev/null
+++ b/packages/backend/migration/1707951601000-optimize-emoji-index.js
@@ -0,0 +1,20 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+export class OptimizeEmojiIndex1707951601000 {
+	name = 'OptimizeEmojiIndex1707951601000'
+
+	async up(queryRunner) {
+		await queryRunner.query(`CREATE INDEX "IDX_EMOJI_ALIASES_IDS" ON "emoji" using gin ("aliases")`)
+		await queryRunner.query(`CREATE INDEX "IDX_EMOJI_ROLE_IDS" ON "emoji" using gin ("roleIdsThatCanBeUsedThisEmojiAsReaction")`)
+		await queryRunner.query(`CREATE INDEX "IDX_EMOJI_CATEGORY" ON "emoji" ("category")`)
+	}
+
+	async down(queryRunner) {
+		await queryRunner.query(`DROP INDEX "IDX_EMOJI_CATEGORY"`)
+		await queryRunner.query(`DROP INDEX "IDX_EMOJI_ROLE_IDS"`)
+		await queryRunner.query(`DROP INDEX "IDX_EMOJI_ALIASES_IDS"`)
+	}
+}