diff --git a/src/locales/ja/achv.json b/src/locales/ja/achv.json
index 66756446642..874e331015a 100644
--- a/src/locales/ja/achv.json
+++ b/src/locales/ja/achv.json
@@ -273,5 +273,12 @@
   "BREEDERS_IN_SPACE": {
     "name": "宇宙のブリーダー！",
     "description": "宇宙バイオームで　エキスパートブリーダーを　倒す"
+  },
+  "trickRoom": {
+    "name": "Trick Room",
+    "shortName": "Trick Room",
+    "desc": "All battles are under the effect of Trick Room, where slower Pokémon move sooner and faster Pokémon move later.\nDisables other challenges' achievements.",
+    "value.0": "Off",
+    "value.1": "On"
   }
 }