diff --git a/packages/backend/package.json b/packages/backend/package.json
index 19547c5033..b989eb9eb7 100644
--- a/packages/backend/package.json
+++ b/packages/backend/package.json
@@ -69,6 +69,7 @@
 		"@bull-board/fastify": "6.0.0",
 		"@bull-board/ui": "6.0.0",
 		"@discordapp/twemoji": "15.1.0",
+		"@elastic/elasticsearch": "^8.14.0",
 		"@fastify/accepts": "5.0.0",
 		"@fastify/cookie": "10.0.0",
 		"@fastify/cors": "10.0.0",
diff --git a/packages/backend/src/GlobalModule.ts b/packages/backend/src/GlobalModule.ts
index 6ae8ccfbb3..0b67bd7911 100644
--- a/packages/backend/src/GlobalModule.ts
+++ b/packages/backend/src/GlobalModule.ts
@@ -7,6 +7,7 @@ import { Global, Inject, Module } from '@nestjs/common';
 import * as Redis from 'ioredis';
 import { DataSource } from 'typeorm';
 import { MeiliSearch } from 'meilisearch';
+import { Client as ElasticSearch } from '@elastic/elasticsearch';
 import { DI } from './di-symbols.js';
 import { Config, loadConfig } from './config.js';
 import { createPostgresDataSource } from './postgres.js';
@@ -45,6 +46,30 @@ const $meilisearch: Provider = {
 	inject: [DI.config],
 };
 
+const $elasticsearch: Provider = {
+	provide: DI.elasticsearch,
+	useFactory: (config: Config) => {
+		if (config.elasticsearch) {
+			return new ElasticSearch({
+				nodes: {
+					url: new URL(`${config.elasticsearch.ssl ? 'https' : 'http'}://${config.elasticsearch.host}:${config.elasticsearch.port}`),
+					ssl: {
+						rejectUnauthorized: config.elasticsearch.rejectUnauthorized,
+					},
+				},
+				auth: (config.elasticsearch.user && config.elasticsearch.pass) ? {
+					username: config.elasticsearch.user,
+					password: config.elasticsearch.pass,
+				} : undefined,
+				pingTimeout: 30000,
+			});
+		} else {
+			return null;
+		}
+	},
+	inject: [DI.config],
+};
+
 const $redis: Provider = {
 	provide: DI.redis,
 	useFactory: (config: Config) => {
@@ -148,8 +173,8 @@ const $meta: Provider = {
 @Global()
 @Module({
 	imports: [RepositoryModule],
-	providers: [$config, $db, $meta, $meilisearch, $redis, $redisForPub, $redisForSub, $redisForTimelines, $redisForReactions],
-	exports: [$config, $db, $meta, $meilisearch, $redis, $redisForPub, $redisForSub, $redisForTimelines, $redisForReactions, RepositoryModule],
+	providers: [$config, $db, $meta, $meilisearch, $elasticsearch, $redis, $redisForPub, $redisForSub, $redisForTimelines, $redisForReactions],
+	exports: [$config, $db, $meta, $meilisearch, $elasticsearch, $redis, $redisForPub, $redisForSub, $redisForTimelines, $redisForReactions, RepositoryModule],
 })
 export class GlobalModule implements OnApplicationShutdown {
 	constructor(
diff --git a/packages/backend/src/config.ts b/packages/backend/src/config.ts
index 9cac058d96..bff2241af9 100644
--- a/packages/backend/src/config.ts
+++ b/packages/backend/src/config.ts
@@ -64,6 +64,15 @@ type Source = {
 	sentryForFrontend?: { options: Partial<Sentry.NodeOptions> };
 
 	publishTarballInsteadOfProvideRepositoryUrl?: boolean;
+	elasticsearch?: {
+		host: string;
+		port: string;
+		user: string;
+		pass: string;
+		ssl?: boolean;
+		rejectUnauthorized?: boolean;
+		index: string;
+	};
 
 	proxy?: string;
 	proxySmtp?: string;
@@ -149,6 +158,15 @@ export type Config = {
 		index: string;
 		scope?: 'local' | 'global' | string[];
 	} | undefined;
+	elasticsearch: {
+		host: string;
+		port: string;
+		user: string;
+		pass: string;
+		ssl?: boolean;
+		rejectUnauthorized?: boolean;
+		index: string;
+	} | undefined;
 	proxy: string | undefined;
 	proxySmtp: string | undefined;
 	proxyBypassHosts: string[] | undefined;
@@ -299,6 +317,7 @@ export function loadConfig(): Config {
 		dbReplications: config.dbReplications,
 		dbSlaves: config.dbSlaves,
 		meilisearch: config.meilisearch,
+		elasticsearch: config.elasticsearch,
 		redis,
 		redisForPubsub: config.redisForPubsub ? convertRedisOptions(config.redisForPubsub, host) : redis,
 		redisForJobQueue: config.redisForJobQueue ? convertRedisOptions(config.redisForJobQueue, host) : redis,
diff --git a/packages/backend/src/core/SearchService.ts b/packages/backend/src/core/SearchService.ts
index 6dc3e85fc8..bd5861ee6a 100644
--- a/packages/backend/src/core/SearchService.ts
+++ b/packages/backend/src/core/SearchService.ts
@@ -8,6 +8,7 @@ import { In } from 'typeorm';
 import { DI } from '@/di-symbols.js';
 import type { Config } from '@/config.js';
 import { bindThis } from '@/decorators.js';
+import { LoggerService } from '@/core/LoggerService.js';
 import { MiNote } from '@/models/Note.js';
 import { MiUser } from '@/models/_.js';
 import type { NotesRepository } from '@/models/_.js';
@@ -16,7 +17,9 @@ import { isUserRelated } from '@/misc/is-user-related.js';
 import { CacheService } from '@/core/CacheService.js';
 import { QueryService } from '@/core/QueryService.js';
 import { IdService } from '@/core/IdService.js';
+import type Logger from '@/logger.js';
 import type { Index, MeiliSearch } from 'meilisearch';
+import type { Client as ElasticSearch } from '@elastic/elasticsearch';
 
 type K = string;
 type V = string | number | boolean;
@@ -65,6 +68,8 @@ function compileQuery(q: Q): string {
 export class SearchService {
 	private readonly meilisearchIndexScope: 'local' | 'global' | string[] = 'local';
 	private meilisearchNoteIndex: Index | null = null;
+	private elasticsearchNoteIndex: string | null = null;
+	private logger: Logger;
 
 	constructor(
 		@Inject(DI.config)
@@ -73,6 +78,9 @@ export class SearchService {
 		@Inject(DI.meilisearch)
 		private meilisearch: MeiliSearch | null,
 
+		@Inject(DI.elasticsearch)
+		private elasticsearch: ElasticSearch | null,
+
 		@Inject(DI.notesRepository)
 		private notesRepository: NotesRepository,
 
@@ -80,8 +88,13 @@ export class SearchService {
 		private queryService: QueryService,
 		private idService: IdService,
 	) {
+		this.logger = this.loggerService.getLogger('note:search');
+
 		if (meilisearch) {
-			this.meilisearchNoteIndex = meilisearch.index(`${this.config.meilisearch?.index}---notes`);
+			this.meilisearchNoteIndex = meilisearch.index(`${config.meilisearch!.index}---notes`);
+			if (config.meilisearch?.scope) {
+				this.meilisearchIndexScope = config.meilisearch.scope;
+			}
 			this.meilisearchNoteIndex.updateSettings({
 				searchableAttributes: [
 					'text',
@@ -106,9 +119,53 @@ export class SearchService {
 				},
 			});
 		}
-
-		if (this.config.meilisearch?.scope) {
-			this.meilisearchIndexScope = this.config.meilisearch.scope;
+			});
+		} else if (this.elasticsearch) {
+			this.elasticsearchNoteIndex = `${config.elasticsearch!.index}---notes`;
+			this.elasticsearch.indices.exists({
+				index: this.elasticsearchNoteIndex,
+			}).then((indexExists) => {
+				if (!indexExists) {
+					this.elasticsearch?.indices.create(
+						{
+							index: this.elasticsearchNoteIndex + `-${new Date().toISOString().slice(0, 7).replace(/-/g, '')}`,
+							mappings: {
+								properties: {
+									text: { type: 'text' },
+									cw: { type: 'text' },
+									createdAt: { type: 'long' },
+									userId: { type: 'keyword' },
+									userHost: { type: 'keyword' },
+									channelId: { type: 'keyword' },
+									tags: { type: 'keyword' },
+								},
+							},
+							settings: {
+								index: {
+									analysis: {
+										tokenizer: {
+											kuromoji: {
+												type: 'kuromoji_tokenizer',
+												mode: 'search',
+											},
+										},
+										analyzer: {
+											kuromoji_analyzer: {
+												type: 'custom',
+												tokenizer: 'kuromoji',
+											},
+										},
+									},
+								},
+							},
+						},
+					).catch((error) => {
+						this.logger.error(error);
+					});
+				}
+			}).catch((error) => {
+				this.logger.error('Error while checking if index exists', error);
+			});
 		}
 	}
 
@@ -146,6 +203,23 @@ export class SearchService {
 			}], {
 				primaryKey: 'id',
 			});
+		}	else if (this.elasticsearch) {
+			const body = {
+				createdAt: this.idService.parse(note.id).date.getTime(),
+				userId: note.userId,
+				userHost: note.userHost,
+				channelId: note.channelId,
+				cw: note.cw,
+				text: note.text,
+				tags: note.tags,
+			};
+			await this.elasticsearch.index({
+				index: this.elasticsearchNoteIndex + `-${new Date().toISOString().slice(0, 7).replace(/-/g, '')}` as string,
+				id: note.id,
+				body: body,
+			}).catch((error) => {
+				console.error(error);
+			});
 		}
 	}
 
@@ -190,7 +264,7 @@ export class SearchService {
 			if (opts.filetype) {
 				if (opts.filetype === 'image') {
 					filter.qs.push({ op: 'or', qs: [
-						{ op: '=', k: 'attachedFileTypes', v: 'image/webp' }, 
+						{ op: '=', k: 'attachedFileTypes', v: 'image/webp' },
 						{ op: '=', k: 'attachedFileTypes', v: 'image/png' },
 						{ op: '=', k: 'attachedFileTypes', v: 'image/jpeg' },
 						{ op: '=', k: 'attachedFileTypes', v: 'image/avif' },
@@ -199,14 +273,14 @@ export class SearchService {
 					] });
 				} else if (opts.filetype === 'video') {
 					filter.qs.push({ op: 'or', qs: [
-						{ op: '=', k: 'attachedFileTypes', v: 'video/mp4' }, 
+						{ op: '=', k: 'attachedFileTypes', v: 'video/mp4' },
 						{ op: '=', k: 'attachedFileTypes', v: 'video/webm' },
 						{ op: '=', k: 'attachedFileTypes', v: 'video/mpeg' },
 						{ op: '=', k: 'attachedFileTypes', v: 'video/x-m4v' },
 					] });
 				} else if (opts.filetype === 'audio') {
 					filter.qs.push({ op: 'or', qs: [
-						{ op: '=', k: 'attachedFileTypes', v: 'audio/mpeg' }, 
+						{ op: '=', k: 'attachedFileTypes', v: 'audio/mpeg' },
 						{ op: '=', k: 'attachedFileTypes', v: 'audio/flac' },
 						{ op: '=', k: 'attachedFileTypes', v: 'audio/wav' },
 						{ op: '=', k: 'attachedFileTypes', v: 'audio/aac' },
@@ -247,6 +321,67 @@ export class SearchService {
 				if (me && isUserRelated(note, userIdsWhoMeMuting)) return false;
 				return true;
 			});
+			return notes.sort((a, b) => a.id > b.id ? -1 : 1);
+		} else if (this.elasticsearch) {
+			const esFilter: any = {
+				bool: {
+					must: [],
+				},
+			};
+
+			if (pagination.untilId) esFilter.bool.must.push({ range: { createdAt: { lt: this.idService.parse(pagination.untilId).date.getTime() } } });
+			if (pagination.sinceId) esFilter.bool.must.push({ range: { createdAt: { gt: this.idService.parse(pagination.sinceId).date.getTime() } } });
+			if (opts.userId) esFilter.bool.must.push({ term: { userId: opts.userId } });
+			if (opts.channelId) esFilter.bool.must.push({ term: { channelId: opts.channelId } });
+			if (opts.host) {
+				if (opts.host === '.') {
+					esFilter.bool.must.push({ bool: { must_not: [{ exists: { field: 'userHost' } }] } });
+				} else {
+					esFilter.bool.must.push({ term: { userHost: opts.host } });
+				}
+			}
+
+			if (q !== '') {
+				esFilter.bool.must.push({
+					bool: {
+						should: [
+							{ wildcard: { 'text': { value: q } } },
+							{ simple_query_string: { fields: ['text'], 'query': q, default_operator: 'and' } },
+							{ wildcard: { 'cw': { value: q } } },
+							{ simple_query_string: { fields: ['cw'], 'query': q, default_operator: 'and' } },
+						],
+						minimum_should_match: 1,
+					},
+				});
+			}
+
+			const res = await (this.elasticsearch.search)({
+				index: this.elasticsearchNoteIndex + '*' as string,
+				body: {
+					query: esFilter,
+					sort: [{ createdAt: { order: 'desc' } }],
+				},
+				_source: ['id', 'createdAt'],
+				size: pagination.limit,
+			});
+
+			const noteIds = res.hits.hits.map((hit: any) => hit._id);
+			if (noteIds.length === 0) return [];
+			const [
+				userIdsWhoMeMuting,
+				userIdsWhoBlockingMe,
+			] = me ? await Promise.all([
+				this.cacheService.userMutingsCache.fetch(me.id),
+				this.cacheService.userBlockedCache.fetch(me.id),
+			]) : [new Set<string>(), new Set<string>()];
+			const notes = (await this.notesRepository.findBy({
+				id: In(noteIds),
+			})).filter(note => {
+				if (me && isUserRelated(note, userIdsWhoBlockingMe)) return false;
+				if (me && isUserRelated(note, userIdsWhoMeMuting)) return false;
+				return true;
+			});
+
 			return notes.sort((a, b) => a.id > b.id ? -1 : 1);
 		} else {
 			const query = this.queryService.makePaginationQuery(this.notesRepository.createQueryBuilder('note'), pagination.sinceId, pagination.untilId);
diff --git a/packages/backend/src/di-symbols.ts b/packages/backend/src/di-symbols.ts
index 5ea500ac77..a0b945f078 100644
--- a/packages/backend/src/di-symbols.ts
+++ b/packages/backend/src/di-symbols.ts
@@ -8,6 +8,7 @@ export const DI = {
 	db: Symbol('db'),
 	meta: Symbol('meta'),
 	meilisearch: Symbol('meilisearch'),
+	elasticsearch: Symbol('elasticsearch'),
 	redis: Symbol('redis'),
 	redisForPub: Symbol('redisForPub'),
 	redisForSub: Symbol('redisForSub'),
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index d2d7035550..4718b1dc8f 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -98,6 +98,9 @@ importers:
       '@discordapp/twemoji':
         specifier: 15.1.0
         version: 15.1.0
+      '@elastic/elasticsearch':
+        specifier: ^8.14.0
+        version: 8.14.0
       '@fastify/accepts':
         specifier: 5.0.0
         version: 5.0.0
@@ -2058,6 +2061,18 @@ packages:
   '@emnapi/runtime@1.3.0':
     resolution: {integrity: sha512-XMBySMuNZs3DM96xcJmLW4EfGnf+uGmFNjzpehMjuX5PLB5j87ar2Zc4e3PVeZ3I5g3tYtAqskB28manlF69Zw==}
 
+  '@discoveryjs/json-ext@0.5.7':
+    resolution: {integrity: sha512-dBVuXR082gk3jsFp7Rd/JI4kytwGHecnCoTtXFb7DB6CNHp4rg5k1bhg0nWdLGLnOV71lmDzGQaLMy8iPLY0pw==}
+    engines: {node: '>=10.0.0'}
+
+  '@elastic/elasticsearch@8.14.0':
+    resolution: {integrity: sha512-MGrgCI4y+Ozssf5Q2IkVJlqt5bUMnKIICG2qxeOfrJNrVugMCBCAQypyesmSSocAtNm8IX3LxfJ3jQlFHmKe2w==}
+    engines: {node: '>=18'}
+
+  '@elastic/transport@8.7.0':
+    resolution: {integrity: sha512-IqXT7a8DZPJtqP2qmX1I2QKmxYyN27kvSW4g6pInESE1SuGwZDp2FxHJ6W2kwmYOJwQdAt+2aWwzXO5jHo9l4A==}
+    engines: {node: '>=18'}
+
   '@esbuild/aix-ppc64@0.19.11':
     resolution: {integrity: sha512-FnzU0LyE3ySQk7UntJO4+qIiQgI7KoODnZg5xzXIrFJlKd2P2gwHsHY4927xj9y5PJmJSzULiUCWmv7iWnNa7g==}
     engines: {node: '>=12'}
@@ -12731,6 +12746,27 @@ snapshots:
       jsonfile: 5.0.0
       universalify: 0.1.2
 
+  '@discoveryjs/json-ext@0.5.7': {}
+
+  '@elastic/elasticsearch@8.14.0':
+    dependencies:
+      '@elastic/transport': 8.7.0
+      tslib: 2.6.2
+    transitivePeerDependencies:
+      - supports-color
+
+  '@elastic/transport@8.7.0':
+    dependencies:
+      '@opentelemetry/api': 1.9.0
+      debug: 4.3.5(supports-color@8.1.1)
+      hpagent: 1.2.0
+      ms: 2.1.3
+      secure-json-parse: 2.7.0
+      tslib: 2.6.2
+      undici: 6.20.1
+    transitivePeerDependencies:
+      - supports-color
+
   '@emnapi/runtime@1.3.0':
     dependencies:
       tslib: 2.6.3