diff --git a/packages/frontend/src/world/utility.ts b/packages/frontend/src/world/utility.ts
index d4d710643e..bb50e28537 100644
--- a/packages/frontend/src/world/utility.ts
+++ b/packages/frontend/src/world/utility.ts
@@ -5,6 +5,7 @@
 
 import * as BABYLON from '@babylonjs/core';
 
+// 1にしてcmを/100したいけど、なぜか(速度調整後の)カメラが前進しなくなる問題がある
 export const WORLD_SCALE = 100;
 
 //export const cm = (value: number) => value / 100;