diff --git a/src/services/note/create.ts b/src/services/note/create.ts
index 75d9521bd7..55d5eed146 100644
--- a/src/services/note/create.ts
+++ b/src/services/note/create.ts
@@ -163,14 +163,14 @@ export default async (user: IUser, data: Option, silent = false) => new Promise<
 
 		tags = data.apHashtags || extractHashtags(combinedTokens);
 
-		// MongoDBのインデックス対象は128文字以上にできない
-		tags = tags.filter(tag => tag.length <= 100);
-
 		emojis = data.apEmojis || extractEmojis(combinedTokens);
 
 		mentionedUsers = data.apMentions || await extractMentionedUsers(user, combinedTokens);
 	}
 
+	// MongoDBのインデックス対象は128文字以上にできない
+	tags = tags.filter(tag => tag.length <= 100);
+
 	if (data.reply && !user._id.equals(data.reply.userId) && !mentionedUsers.some(u => u._id.equals(data.reply.userId))) {
 		mentionedUsers.push(await User.findOne({ _id: data.reply.userId }));
 	}