diff --git a/locales/ja.json b/locales/ja.json
index ac412c5..7940e83 100644
--- a/locales/ja.json
+++ b/locales/ja.json
@@ -1,6 +1,6 @@
 {
     "locale.local_name": "日本語",
-    "locale.minecraft_locale": "ja_JP",
+    "locale.minecraft_locale": "ja_jp",
     "locale.change_locale.title": "言語選択",
     "settings.mc_version.label": "バージョン:",
     "settings.mc_version.mc1_19": "Minecraft 1.19.x",
diff --git a/scripts/createVanillaZips.py b/scripts/createVanillaZips.py
index 3d1cc02..77f6a93 100644
--- a/scripts/createVanillaZips.py
+++ b/scripts/createVanillaZips.py
@@ -56,7 +56,8 @@
     "lang/pt_br",
     "lang/ru_ru",
     "lang/zh_cn",
-    "lang/tr_tr"
+    "lang/tr_tr",
+    "lang/ja_jp"
 ]
 
 REQUIRED_PATHS = [