diff --git a/locales/index.d.ts b/locales/index.d.ts
index 42f382dcb6ab..56b6045feaa5 100644
--- a/locales/index.d.ts
+++ b/locales/index.d.ts
@@ -5096,6 +5096,10 @@ export interface Locale extends ILocale {
      * 新規登録したユーザーに表示されるチュートリアルをスキップできないようにします。チュートリアルを完了しなかったりチュートリアルページを回避したりした場合でも、強制的にリダイレクトされます。
      */
     "prohibitSkippingInitialTutorialDescription": string;
+    /**
+     * エクスポートしたいカテゴリを選択
+     */
+    "selectCategoryYouWantToExport": string;
     "_delivery": {
         /**
          * 配信状態
diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index 66bf161ac188..bacd14fb57b1 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -1270,6 +1270,7 @@ createdAntennas: "作成したアンテナ"
 clipNoteLimitExceeded: "これ以上このクリップにノートを追加できません。"
 prohibitSkippingInitialTutorial: "チュートリアルをスキップできないようにする"
 prohibitSkippingInitialTutorialDescription: "新規登録したユーザーに表示されるチュートリアルをスキップできないようにします。チュートリアルを完了しなかったりチュートリアルページを回避したりした場合でも、強制的にリダイレクトされます。"
+selectCategoryYouWantToExport: "エクスポートしたいカテゴリを選択"
 
 _delivery:
   status: "配信状態"
diff --git a/packages/backend/src/core/QueueService.ts b/packages/backend/src/core/QueueService.ts
index 37f242f63cfc..a0161f830238 100644
--- a/packages/backend/src/core/QueueService.ts
+++ b/packages/backend/src/core/QueueService.ts
@@ -183,9 +183,10 @@ export class QueueService {
 	}
 
 	@bindThis
-	public createExportCustomEmojisJob(user: ThinUser) {
+	public createExportCustomEmojisJob(user: ThinUser, opts: { categories?: (string | null)[]; } = {}) {
 		return this.dbQueue.add('exportCustomEmojis', {
 			user: { id: user.id },
+			categories: opts.categories,
 		}, {
 			removeOnComplete: true,
 			removeOnFail: true,
diff --git a/packages/backend/src/queue/processors/ExportCustomEmojisProcessorService.ts b/packages/backend/src/queue/processors/ExportCustomEmojisProcessorService.ts
index e4eb4791bd7f..8a87233fd63d 100644
--- a/packages/backend/src/queue/processors/ExportCustomEmojisProcessorService.ts
+++ b/packages/backend/src/queue/processors/ExportCustomEmojisProcessorService.ts
@@ -75,7 +75,7 @@ export class ExportCustomEmojisProcessorService {
 
 		await writeMeta(`{"metaVersion":2,"host":"${this.config.host}","exportedAt":"${new Date().toString()}","emojis":[`);
 
-		const customEmojis = await this.emojisRepository.find({
+		let customEmojis = await this.emojisRepository.find({
 			where: {
 				host: IsNull(),
 			},
@@ -84,6 +84,20 @@ export class ExportCustomEmojisProcessorService {
 			},
 		});
 
+		// job.data.categoriesに指定がある場合はそのカテゴリのみをエクスポート
+		const categories = job.data.categories as (string | null)[] | null;
+		this.logger.info(`Exporting categories: ${categories}`);
+		if (categories != null) {
+			customEmojis = customEmojis.filter(emoji => {
+				if (emoji.category == null || emoji.category === 'null') {
+					// カテゴリがnull、つまりカテゴリなしのもの
+					return categories.includes(null) || categories.includes('null');
+				} else {
+					return categories.includes(emoji.category);
+				}
+			});
+		}
+
 		for (const emoji of customEmojis) {
 			if (!/^[a-zA-Z0-9_]+$/.test(emoji.name)) {
 				this.logger.error(`invalid emoji name: ${emoji.name}`);
diff --git a/packages/backend/src/queue/types.ts b/packages/backend/src/queue/types.ts
index de888bda092f..c4cd7b8f94a9 100644
--- a/packages/backend/src/queue/types.ts
+++ b/packages/backend/src/queue/types.ts
@@ -41,7 +41,7 @@ export type DbJobData<T extends keyof DbJobMap> = DbJobMap[T];
 
 export type DbJobMap = {
 	deleteDriveFiles: DbJobDataWithUser;
-	exportCustomEmojis: DbJobDataWithUser;
+	exportCustomEmojis: DbExportCustomEmojisJobData;
 	exportAntennas: DBExportAntennasData;
 	exportNotes: DbJobDataWithUser;
 	exportFavorites: DbJobDataWithUser;
@@ -71,6 +71,11 @@ export type DbJobDataWithUser = {
 	user: ThinUser;
 }
 
+export type DbExportCustomEmojisJobData = {
+	user: ThinUser;
+	categories?: string[]
+}
+
 export type DbExportFollowingData = {
 	user: ThinUser;
 	excludeMuting: boolean;
diff --git a/packages/backend/src/server/api/endpoints/export-custom-emojis.ts b/packages/backend/src/server/api/endpoints/export-custom-emojis.ts
index 5ff099524df7..bd41862463a8 100644
--- a/packages/backend/src/server/api/endpoints/export-custom-emojis.ts
+++ b/packages/backend/src/server/api/endpoints/export-custom-emojis.ts
@@ -19,7 +19,17 @@ export const meta = {
 
 export const paramDef = {
 	type: 'object',
-	properties: {},
+	properties: {
+		categories: {
+			type: 'array',
+			items: {
+				type: 'string',
+				nullable: true,
+			},
+			description: 'If null is provided instead of array, all emojis will be exported. If null is provided as an element of the array, emojis without category will be exported.',
+			nullable: true,
+		},
+	},
 	required: [],
 } as const;
 
@@ -29,7 +39,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 		private queueService: QueueService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
-			this.queueService.createExportCustomEmojisJob(me);
+			this.queueService.createExportCustomEmojisJob(me, { categories: ps.categories ?? [] });
 		});
 	}
 }
diff --git a/packages/frontend/src/pages/custom-emojis-manager.vue b/packages/frontend/src/pages/custom-emojis-manager.vue
index eea3f681301b..4ac9e1b6c298 100644
--- a/packages/frontend/src/pages/custom-emojis-manager.vue
+++ b/packages/frontend/src/pages/custom-emojis-manager.vue
@@ -84,6 +84,8 @@ import { selectFile } from '@/scripts/select-file.js';
 import * as os from '@/os.js';
 import { misskeyApi } from '@/scripts/misskey-api.js';
 import { i18n } from '@/i18n.js';
+import type { EnumItem } from '@/scripts/form.js';
+import { customEmojiCategories } from '@/custom-emojis.js';
 import { definePageMetadata } from '@/scripts/page-metadata.js';
 
 const emojisPaginationComponent = shallowRef<InstanceType<typeof MkPagination>>();
@@ -180,7 +182,41 @@ const menu = (ev: MouseEvent) => {
 		icon: 'ti ti-download',
 		text: i18n.ts.export,
 		action: async () => {
+			const emojiCategoryItems = customEmojiCategories.value.map(category => {
+				if (category == null) {
+					return { value: '_NULL_', label: i18n.ts.other };
+				} else {
+					return { value: category, label: category };
+				}
+			}) satisfies EnumItem[];
+
+			// TODO: 複数選択可にする
+			const { canceled, result } = await os.form(i18n.ts.selectCategoryYouWantToExport, {
+				category: {
+					type: 'enum',
+					label: i18n.ts.category,
+					enum: [
+						{ value: '_ALL_', label: i18n.ts.all },
+						...emojiCategoryItems,
+					],
+					default: '_ALL_',
+				},
+			});
+
+			if (canceled) return;
+
+			let categories: (string | null)[] | null = null;
+
+			if (result.category === '_ALL_') {
+				categories = null;
+			} else if (result.category === '_NULL_') {
+				categories = [null];
+			} else {
+				categories = [result.category];
+			}
+
 			misskeyApi('export-custom-emojis', {
+				categories,
 			})
 				.then(() => {
 					os.alert({
diff --git a/packages/frontend/src/scripts/form.ts b/packages/frontend/src/scripts/form.ts
index 242a504c3b5f..79f2bf8107ba 100644
--- a/packages/frontend/src/scripts/form.ts
+++ b/packages/frontend/src/scripts/form.ts
@@ -5,7 +5,7 @@
 
 import * as Misskey from 'misskey-js';
 
-type EnumItem = string | {
+export type EnumItem = string | {
 	label: string;
 	value: string;
 };
diff --git a/packages/misskey-js/etc/misskey-js.api.md b/packages/misskey-js/etc/misskey-js.api.md
index ca1f4a32539c..b95448a5defa 100644
--- a/packages/misskey-js/etc/misskey-js.api.md
+++ b/packages/misskey-js/etc/misskey-js.api.md
@@ -1439,6 +1439,7 @@ declare namespace entities {
         EndpointRequest,
         EndpointResponse,
         EndpointsResponse,
+        ExportCustomEmojisRequest,
         FederationFollowersRequest,
         FederationFollowersResponse,
         FederationFollowingRequest,
@@ -1828,6 +1829,9 @@ export { entities }
 // @public (undocumented)
 type Error_2 = components['schemas']['Error'];
 
+// @public (undocumented)
+type ExportCustomEmojisRequest = operations['export-custom-emojis']['requestBody']['content']['application/json'];
+
 // @public (undocumented)
 type FederationFollowersRequest = operations['federation___followers']['requestBody']['content']['application/json'];
 
diff --git a/packages/misskey-js/src/autogen/endpoint.ts b/packages/misskey-js/src/autogen/endpoint.ts
index f4778316a610..0084a07be354 100644
--- a/packages/misskey-js/src/autogen/endpoint.ts
+++ b/packages/misskey-js/src/autogen/endpoint.ts
@@ -248,6 +248,7 @@ import type {
 	EndpointRequest,
 	EndpointResponse,
 	EndpointsResponse,
+	ExportCustomEmojisRequest,
 	FederationFollowersRequest,
 	FederationFollowersResponse,
 	FederationFollowingRequest,
@@ -741,7 +742,7 @@ export type Endpoints = {
 	'email-address/available': { req: EmailAddressAvailableRequest; res: EmailAddressAvailableResponse };
 	'endpoint': { req: EndpointRequest; res: EndpointResponse };
 	'endpoints': { req: EmptyRequest; res: EndpointsResponse };
-	'export-custom-emojis': { req: EmptyRequest; res: EmptyResponse };
+	'export-custom-emojis': { req: ExportCustomEmojisRequest; res: EmptyResponse };
 	'federation/followers': { req: FederationFollowersRequest; res: FederationFollowersResponse };
 	'federation/following': { req: FederationFollowingRequest; res: FederationFollowingResponse };
 	'federation/instances': { req: FederationInstancesRequest; res: FederationInstancesResponse };
diff --git a/packages/misskey-js/src/autogen/entities.ts b/packages/misskey-js/src/autogen/entities.ts
index ee9eaed42250..0c12b3e80d50 100644
--- a/packages/misskey-js/src/autogen/entities.ts
+++ b/packages/misskey-js/src/autogen/entities.ts
@@ -251,6 +251,7 @@ export type EmailAddressAvailableResponse = operations['email-address___availabl
 export type EndpointRequest = operations['endpoint']['requestBody']['content']['application/json'];
 export type EndpointResponse = operations['endpoint']['responses']['200']['content']['application/json'];
 export type EndpointsResponse = operations['endpoints']['responses']['200']['content']['application/json'];
+export type ExportCustomEmojisRequest = operations['export-custom-emojis']['requestBody']['content']['application/json'];
 export type FederationFollowersRequest = operations['federation___followers']['requestBody']['content']['application/json'];
 export type FederationFollowersResponse = operations['federation___followers']['responses']['200']['content']['application/json'];
 export type FederationFollowingRequest = operations['federation___following']['requestBody']['content']['application/json'];
diff --git a/packages/misskey-js/src/autogen/types.ts b/packages/misskey-js/src/autogen/types.ts
index b79dc8b8c60e..dd0f52dfdeb9 100644
--- a/packages/misskey-js/src/autogen/types.ts
+++ b/packages/misskey-js/src/autogen/types.ts
@@ -14905,6 +14905,14 @@ export type operations = {
    * **Credential required**: *Yes*
    */
   'export-custom-emojis': {
+    requestBody: {
+      content: {
+        'application/json': {
+          /** @description If null is provided instead of array, all emojis will be exported. If null is provided as an element of the array, emojis without category will be exported. */
+          categories?: ((string | null)[]) | null;
+        };
+      };
+    };
     responses: {
       /** @description OK (without any results) */
       204: {