diff --git a/src/slic3r/GUI/GUI_App.cpp b/src/slic3r/GUI/GUI_App.cpp
index 1f5da3634d..dbe4fe2aa3 100644
--- a/src/slic3r/GUI/GUI_App.cpp
+++ b/src/slic3r/GUI/GUI_App.cpp
@@ -4347,7 +4347,7 @@ bool GUI_App::load_language(wxString language, bool initial)
                         {"it", wxString::FromUTF8("\x49\x74\x61\x6C\x69\x61\x6E\x6F")},
                         {"ru", wxString::FromUTF8("\xD1\x80\xD1\x83\xD1\x81\xD1\x81\xD0\xBA\xD0\xB8\xD0\xB9")},
                         {"hu", wxString::FromUTF8("Magyar")},
-                        {"ja", wxString::FromUTF8("\xE6\x97\xA5\xE8\xAF\xAD")}
+                        {"ja", wxString::FromUTF8("\xE6\x97\xA5\xE6\x9C\xAC\xE8\xAA\x9E")}
                     };
                     for (auto l : language_descptions) {
                         const wxLanguageInfo *langinfo = wxLocale::FindLanguageInfo(l.first);
diff --git a/src/slic3r/GUI/Preferences.cpp b/src/slic3r/GUI/Preferences.cpp
index e797fdb762..8c1b9c89e9 100644
--- a/src/slic3r/GUI/Preferences.cpp
+++ b/src/slic3r/GUI/Preferences.cpp
@@ -110,8 +110,6 @@ wxBoxSizer *PreferencesDialog::create_item_language_combobox(
         auto language_name = vlist[i]->Description;
 
         if (vlist[i] == wxLocale::GetLanguageInfo(wxLANGUAGE_CHINESE_SIMPLIFIED)) {
-            //language_name = _L(vlist[i]->Description);
-            //language_name = _L("Chinese (Simplified)");
             language_name = wxString::FromUTF8("\xe4\xb8\xad\xe6\x96\x87\x28\xe7\xae\x80\xe4\xbd\x93\x29");
         }
         else if (vlist[i] == wxLocale::GetLanguageInfo(wxLANGUAGE_SPANISH)) {
@@ -132,6 +130,9 @@ wxBoxSizer *PreferencesDialog::create_item_language_combobox(
         else if (vlist[i] == wxLocale::GetLanguageInfo(wxLANGUAGE_HUNGARIAN)) {
             language_name = wxString::FromUTF8("Magyar");
         }
+        else if (vlist[i] == wxLocale::GetLanguageInfo(wxLANGUAGE_JAPANESE)) {
+            language_name = wxString::FromUTF8("\xE6\x97\xA5\xE6\x9C\xAC\xE8\xAA\x9E");
+        }
 
         if (app_config->get(param) == vlist[i]->CanonicalName) {
             m_current_language_selected = i;