diff --git a/src/server/api/endpoints/notes/search-by-tag.ts b/src/server/api/endpoints/notes/search-by-tag.ts
index 61f62dd5a6..93bfa75d3b 100644
--- a/src/server/api/endpoints/notes/search-by-tag.ts
+++ b/src/server/api/endpoints/notes/search-by-tag.ts
@@ -105,17 +105,13 @@ export default define(meta, async (ps, me) => {
 	if (me) generateMutedUserQuery(query, me);
 
 	if (ps.tag) {
-		if (!safeForSql(ps.tag)) return;
-		query.andWhere(`'{"${normalizeForSearch(ps.tag)}"}' <@ note.tags`);
+		query.andWhere(`'{"${safeForSql(ps.tag) ? normalizeForSearch(ps.tag) : 'aichan_kawaii'}"}' <@ note.tags`);
 	} else {
-		let i = 0;
 		query.andWhere(new Brackets(qb => {
 			for (const tags of ps.query!) {
 				qb.orWhere(new Brackets(qb => {
 					for (const tag of tags) {
-						if (!safeForSql(tag)) return;
-						qb.andWhere(`'{"${normalizeForSearch(ps.tag)}"}' <@ note.tags`);
-						i++;
+						qb.andWhere(`'{"${safeForSql(tag) ? normalizeForSearch(tag) : 'aichan_kawaii'}"}' <@ note.tags`);
 					}
 				}));
 			}