diff --git a/src/locales/ja/mystery-encounters/mysterious-chest-dialogue.json b/src/locales/ja/mystery-encounters/mysterious-chest-dialogue.json
index 6a649877d3b..79898bb7e44 100644
--- a/src/locales/ja/mystery-encounters/mysterious-chest-dialogue.json
+++ b/src/locales/ja/mystery-encounters/mysterious-chest-dialogue.json
@@ -1,23 +1,23 @@
 {
-  "intro": "You found...@d{32} a chest?",
-  "title": "The Mysterious Chest",
-  "description": "A beautifully ornamented chest stands on the ground. There must be something good inside... right?",
-  "query": "Will you open it?",
+  "intro": "あれは……@d{32} 宝箱？",
+  "title": "謎の宝箱",
+  "description": "美しく　飾られた　宝箱が　地面に　あります。　中には　何か　良いものが　あるはず…… でしょう？",
+  "query": "開けますか？",
   "option": {
     "1": {
-      "label": "Open It",
-      "tooltip": "@[SUMMARY_BLUE]{({{trapPercent}}%) Something terrible}\n@[SUMMARY_GREEN]{({{commonPercent}}%) Okay Rewards}\n@[SUMMARY_GREEN]{({{ultraPercent}}%) Good Rewards}\n@[SUMMARY_GREEN]{({{roguePercent}}%) Great Rewards}\n@[SUMMARY_GREEN]{({{masterPercent}}%) Amazing Rewards}",
-      "selected": "You open the chest to find...",
-      "normal": "Just some normal tools and items.",
-      "good": "Some pretty nice tools and items.",
-      "great": "A couple great tools and items!",
-      "amazing": "Whoa! An amazing item!",
-      "bad": "Oh no!@d{32}\nThe chest was actually a {{gimmighoulName}} in disguise!$Your {{pokeName}} jumps in front of you\nbut is KOed in the process!"
+      "label": "開ける",
+      "tooltip": "@[SUMMARY_BLUE]{({{trapPercent}}%) 何かヒドいこと}\n@[SUMMARY_GREEN]{({{commonPercent}}%) まあいいご褒美}\n@[SUMMARY_GREEN]{({{ultraPercent}}%) 良いご褒美}\n@[SUMMARY_GREEN]{({{roguePercent}}%) すごいご褒美}\n@[SUMMARY_GREEN]{({{masterPercent}}%) 素晴らしいご褒美}",
+      "selected": "宝箱を　開けると　見つけるのは……",
+      "normal": "普通の　道具や　アイテム　だけです…… ",
+      "good": "結構　良い道具や　アイテム　です。",
+      "great": "すごい　道具や　アイテム　ですね！",
+      "amazing": "わあ！　何と　素晴らしい　アイテム！",
+      "bad": "ああ、　だめだ！@d{32}\n宝箱は　実に　{{gimmighoulName}}の　変装でした！${{pokeName}}は守ろうとして　飛び込んで　来ますが、\nその結果　倒れてしまいます！"
     },
     "2": {
-      "label": "Too Risky, Leave",
-      "tooltip": "(-) No Rewards",
-      "selected": "You hurry along your way,\nwith a slight feeling of regret."
+      "label": "危なそうで立ち去る",
+      "tooltip": "(-) ご褒美なし",
+      "selected": "僅かな　後悔の　気持ちで\nさっさと　先を　進みます。"
     }
   }
 }