diff --git a/source/ui/optionsPage.cpp b/source/ui/optionsPage.cpp
index b9bc19f..ebe7e67 100755
--- a/source/ui/optionsPage.cpp
+++ b/source/ui/optionsPage.cpp
@@ -16,7 +16,7 @@
 namespace inst::ui {
     extern MainApplication *mainApp;
 
-    std::vector<std::string> languageStrings = {"English", "Français", "Deutsch", "Italiano", "Русский"};
+    std::vector<std::string> languageStrings = {"English", "日本語", "Français", "Deutsch", "Italiano", "Русский"};
 
     optionsPage::optionsPage() : Layout::Layout() {
         this->SetBackgroundColor(COLOR("#670000FF"));
@@ -79,15 +79,17 @@ namespace inst::ui {
             case 1:
             case 12:
                 return languageStrings[0];
+            case 0:
+                return languageStrings[1];
             case 2:
             case 13:
-                return languageStrings[1];
-            case 3:
                 return languageStrings[2];
-            case 4:
+            case 3:
                 return languageStrings[3];
-            case 10:
+            case 4:
                 return languageStrings[4];
+            case 10:
+                return languageStrings[5];
             default:
                 return "options.language.system_language"_lang;
         }
@@ -202,15 +204,18 @@ namespace inst::ui {
                             inst::config::languageSetting = 1;
                             break;
                         case 1:
-                            inst::config::languageSetting = 2;
+                            inst::config::languageSetting = 0;
                             break;
                         case 2:
-                            inst::config::languageSetting = 3;
+                            inst::config::languageSetting = 2;
                             break;
                         case 3:
-                            inst::config::languageSetting = 4;
+                            inst::config::languageSetting = 3;
                             break;
                         case 4:
+                            inst::config::languageSetting = 4;
+                            break;
+                        case 5:
                             inst::config::languageSetting = 10;
                             break;
                         default:
diff --git a/source/util/lang.cpp b/source/util/lang.cpp
index 8dce2bd..392d72d 100755
--- a/source/util/lang.cpp
+++ b/source/util/lang.cpp
@@ -22,7 +22,7 @@ namespace Language {
         } 
         switch (langInt) {
             case 0:
-                languagePath = "romfs:/lang/ja.json";
+                languagePath = "romfs:/lang/jp.json";
                 break;
             case 2:
             case 13: