diff --git a/packages/backend/src/core/ReactionService.ts b/packages/backend/src/core/ReactionService.ts
index b3aea878d..97a0b5ee6 100644
--- a/packages/backend/src/core/ReactionService.ts
+++ b/packages/backend/src/core/ReactionService.ts
@@ -158,6 +158,7 @@ export class ReactionService {
 		// カスタム絵文字リアクションだったら絵文字情報も送る
 		const decodedReaction = this.decodeReaction(reaction);
 
+		// TODO: Cache
 		const emoji = await this.emojisRepository.findOne({
 			where: {
 				name: decodedReaction.name,