diff --git a/.config/docker_example.yml b/.config/docker_example.yml
index afef8f650b..292f79e696 100644
--- a/.config/docker_example.yml
+++ b/.config/docker_example.yml
@@ -194,5 +194,6 @@ signToActivityPubGet: true
 # Upload or download file size limits (bytes)
 #maxFileSize: 262144000
 
-tagging:
-  defaultTag: null
+defaultTag:
+  tag: null
+  append: true
diff --git a/.config/example.yml b/.config/example.yml
index d2f1660c77..42f460ed07 100644
--- a/.config/example.yml
+++ b/.config/example.yml
@@ -226,5 +226,6 @@ signToActivityPubGet: true
 # PID File of master process
 #pidFile: /tmp/misskey.pid
 
-tagging:
-  defaultTag: null
+defaultTag:
+  tag: null
+  append: true
diff --git a/packages/backend/src/config.ts b/packages/backend/src/config.ts
index 281b0892e4..797fe5ae4d 100644
--- a/packages/backend/src/config.ts
+++ b/packages/backend/src/config.ts
@@ -56,8 +56,9 @@ type Source = {
 		index: string;
 		scope?: 'local' | 'global' | string[];
 	};
-	tagging: {
-		defaultTag: string;
+	defaultTag: {
+		tag: string;
+		append: boolean;
 	};
 
 	proxy?: string;
@@ -127,8 +128,9 @@ export type Config = {
 		index: string;
 		scope?: 'local' | 'global' | string[];
 	} | undefined;
-	tagging: {
-		defaultTag: string;
+	defaultTag: {
+		tag: string;
+		append: boolean;
 	};
 	proxy: string | undefined;
 	proxySmtp: string | undefined;
@@ -267,7 +269,7 @@ export function loadConfig(): Config {
 		perUserNotificationsMaxCount: config.perUserNotificationsMaxCount ?? 500,
 		deactivateAntennaThreshold: config.deactivateAntennaThreshold ?? (1000 * 60 * 60 * 24 * 7),
 		pidFile: config.pidFile,
-		tagging: config.tagging,
+		defaultTag: config.defaultTag,
 	};
 }
 
diff --git a/packages/backend/src/core/NoteCreateService.ts b/packages/backend/src/core/NoteCreateService.ts
index 5460735799..35694f727d 100644
--- a/packages/backend/src/core/NoteCreateService.ts
+++ b/packages/backend/src/core/NoteCreateService.ts
@@ -320,10 +320,10 @@ export class NoteCreateService implements OnApplicationShutdown {
 			data.localOnly = true;
 		}
 
-		// デフォルトハッシュタグ処理
-		if (['public', 'home'].includes(data.visibility)) {
-			if (this.config.tagging?.defaultTag != null) {
-				const tag = `#${this.config.tagging?.defaultTag}`;
+		// デフォルトハッシュタグを本文末尾に書き足す
+		if (this.config.defaultTag?.append && ['public', 'home'].includes(data.visibility)) {
+			if (this.config.defaultTag?.tag != null) {
+				const tag = `#${this.config.defaultTag?.tag}`;
 				if (String(data.text).match(tag)) {
 					data.text = `${data.text}\n\n${tag}`;
 				}
@@ -923,10 +923,10 @@ export class NoteCreateService implements OnApplicationShutdown {
 				}
 			}
 
-			// デフォルトハッシュタグ
-			if (this.config.tagging?.defaultTag != null) {
+			// デフォルトハッシュタグを含む投稿は、リモートであってもローカルタイムラインに含める
+			if (this.config.defaultTag?.tag != null) {
 				const noteTags = note.tags ? note.tags.map((t: string) => t.toLowerCase()) : [];
-				if (note.visibility === 'public' && noteTags.includes(normalizeForSearch(this.config.tagging?.defaultTag))) {
+				if (note.visibility === 'public' && noteTags.includes(normalizeForSearch(this.config.defaultTag?.tag))) {
 					this.fanoutTimelineService.push('localTimelineWithReplies', note.id, 300, r);
 					this.fanoutTimelineService.push('localTimeline', note.id, 1000, r);
 					if (note.fileIds.length > 0) {
diff --git a/packages/backend/src/server/api/endpoints/notes/hybrid-timeline.ts b/packages/backend/src/server/api/endpoints/notes/hybrid-timeline.ts
index 2b25bec1c5..855cbd1852 100644
--- a/packages/backend/src/server/api/endpoints/notes/hybrid-timeline.ts
+++ b/packages/backend/src/server/api/endpoints/notes/hybrid-timeline.ts
@@ -201,7 +201,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				}
 
 				const config = loadConfig();
-				const defaultTag: string | null = config.tagging?.defaultTag;
+				const defaultTag: string | null = config.defaultTag?.tag;
 				if (defaultTag == null) {
 					qb.orWhere('(note.visibility = \'public\') AND (note.userHost IS NULL)');
 				} else {
diff --git a/packages/backend/src/server/api/endpoints/notes/local-timeline.ts b/packages/backend/src/server/api/endpoints/notes/local-timeline.ts
index 1c49023073..8c6b605e67 100644
--- a/packages/backend/src/server/api/endpoints/notes/local-timeline.ts
+++ b/packages/backend/src/server/api/endpoints/notes/local-timeline.ts
@@ -152,7 +152,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 		withReplies: boolean,
 	}, me: MiLocalUser | null) {
 		const config = loadConfig();
-		const defaultTag: string | null = config.tagging?.defaultTag;
+		const defaultTag: string | null = config.defaultTag?.tag;
 		const query = this.queryService.makePaginationQuery(this.notesRepository.createQueryBuilder('note'),
 			ps.sinceId, ps.untilId)
 			.andWhere(new Brackets(qb => {
diff --git a/packages/backend/src/server/api/stream/channels/hybrid-timeline.ts b/packages/backend/src/server/api/stream/channels/hybrid-timeline.ts
index 38196a9c68..d6759845ab 100644
--- a/packages/backend/src/server/api/stream/channels/hybrid-timeline.ts
+++ b/packages/backend/src/server/api/stream/channels/hybrid-timeline.ts
@@ -47,7 +47,7 @@ class HybridTimelineChannel extends Channel {
 		this.withReplies = params.withReplies ?? false;
 		this.withFiles = params.withFiles ?? false;
 		const config = loadConfig();
-		this.defaultTag = config.tagging?.defaultTag;
+		this.defaultTag = config.defaultTag?.tag;
 
 		// Subscribe events
 		this.subscriber.on('notesStream', this.onNote);
diff --git a/packages/backend/src/server/api/stream/channels/local-timeline.ts b/packages/backend/src/server/api/stream/channels/local-timeline.ts
index f8d97a6aab..15b4d60786 100644
--- a/packages/backend/src/server/api/stream/channels/local-timeline.ts
+++ b/packages/backend/src/server/api/stream/channels/local-timeline.ts
@@ -45,7 +45,7 @@ class LocalTimelineChannel extends Channel {
 		this.withReplies = params.withReplies ?? false;
 		this.withFiles = params.withFiles ?? false;
 		const config = loadConfig();
-		this.defaultTag = config.tagging?.defaultTag;
+		this.defaultTag = config.defaultTag?.tag;
 
 		// Subscribe events
 		this.subscriber.on('notesStream', this.onNote);