diff --git a/scim-wnn/src/kanainput.cpp b/scim-wnn/src/kanainput.cpp
index 73f5750..0e40ab7 100644
--- a/scim-wnn/src/kanainput.cpp
+++ b/scim-wnn/src/kanainput.cpp
@@ -146,9 +146,18 @@
  */
 bool KanaInput::inputEvent(const KeyEvent &key)
 {
-    if (key.is_alt_down() || key.is_control_down()) {
-        return(false);
-    }
+    // ���äƤ����٤���Ρ�
+    if ((key.code == SCIM_KEY_Shift_L) ||
+        (key.code == SCIM_KEY_Shift_R) ||
+        (key.code == SCIM_KEY_Control_L) ||
+        (key.code == SCIM_KEY_Control_R) ||
+        (key.code == SCIM_KEY_Alt_L) ||
+        (key.code == SCIM_KEY_Alt_R) ||
+        (key.code == SCIM_KEY_Super_L) ||
+        (key.code == SCIM_KEY_Super_R) ||
+        (key.code == SCIM_KEY_Hyper_L) ||
+        (key.code == SCIM_KEY_Hyper_R)) return(true);
+
     for(unsigned int i = 0;KanaInputTable[i].code != 0;++ i) {
         if (key.code == KanaInputTable[i].code) {
             WideString w;