actually get japanese working

flakes/de_plasma/de_plasma.nix

@@ -107,7 +107,6 @@ in
       };
       services.desktopManager.plasma6.enable = true;
 
-
       # Audio / IPC
       services.pipewire = {
         enable = true;
@@ -153,12 +152,17 @@ in
         wl-clip-persist
       ];
 
-
-      # Keyboard like sway/i3
       console.useXkbConfig = true;
       services.xserver.xkb = {
         layout = "us";
-        options = "caps:escape";
+      };
+      services.keyd = {
+        enable = true;
+        keyboards.default.settings = {
+          main = {
+            capslock = "escape";
+          };
+        };
       };
 
       # Home Manager modules (plasma-manager + our HM layer)
@@ -247,6 +251,30 @@ in
       };
     })
 
+    # Japanese
+    ({
+      i18n.inputMethod = {
+        enable = true;
+        type = "fcitx5";
+        fcitx5 = {
+          waylandFrontend = true;
+          ignoreUserConfig = true;
+          addons = with pkgs; [ fcitx5-mozc ];
+          settings = {
+            inputMethod = {
+              "Groups/0" = {
+                Name = "Default";
+                "Default Layout" = "us";
+                DefaultIM = "keyboard-us";
+              };
+              "Groups/0/Items/0".Name = "keyboard-us";
+              "Groups/0/Items/1".Name = "mozc";
+            };
+          };
+        };
+      };
+    })
+
     {
       assertions = [
         {

flakes/de_plasma/home_manager/default.nix

@@ -58,9 +58,7 @@ in
         keyboard = {
           layouts = [
             { layout = "us"; }
-            { layout = "jp"; }
           ];
-          options = [ "caps:escape" ];
         };
         mice = [
           # {
@@ -304,7 +302,9 @@ in
       configFile = {
         kwalletrc.Wallet.Enabled = false;
         plasmanotifyrc.Notifications.PopupPosition = "TopRight";
-
+        ksmserverrc.General.loginMode = "restorePreviousLogout";
+        kwinrc.Wayland.InputMethod =
+          "/run/current-system/sw/share/applications/org.fcitx.Fcitx5.desktop";
       };
     };
   };

flakes/de_plasma/home_manager/shortcuts.nix

@@ -53,7 +53,7 @@ in
         "Lock Session" = "Meta+Shift+L";
       };
 
-      "KDE Keyboard Layout Switcher"."Switch to Next Keyboard Layout" = "Meta+K";
+      # "KDE Keyboard Layout Switcher"."Switch to Next Keyboard Layout" = "Meta+K";
     };
 
     # Custom hotkey commands