diff --git a/honoka/plugins/asciiinput.cpp b/honoka/plugins/asciiinput.cpp
index ec5a0a8..7928ab0 100644
--- a/honoka/plugins/asciiinput.cpp
+++ b/honoka/plugins/asciiinput.cpp
@@ -20,6 +20,8 @@
 
 #include "asciiinput.h"
 
+#include <asciiplugin.h>
+
 #ifdef HAVE_CONFIG_H
   #include <config.h>
 #endif
@@ -38,6 +40,7 @@
 
 AsciiInput::AsciiInput(ConfigPointer cfg) : PreEditor(cfg)
 {
+    scim_string_to_key_list(lowProprotyKey,cfg->read(HONOKA_CONFIG_ASCIIINPUT_LOW_PRIORITY_KEY,String(HONOKA_DEFAULT_ASCIIINPUT_LOW_PRIORITY_KEY)));
 }
 
 
@@ -75,6 +78,29 @@
  */
 bool AsciiInput::inputEvent(const KeyEvent &key)
 {
+    return keyEvent(key);
+}
+
+
+
+/*!
+    \fn AsciiInput::keyEventHook(const KeyEvent &key)
+ */
+bool AsciiInput::keyEventHook(const KeyEvent &key)
+{
+    if (key.is_key_release()) return false;
+    if (lowProprotyKey.comp(key)) return false;
+    else return keyEvent(key);
+}
+
+
+
+
+/*!
+    \fn Honoka::AsciiInput::keyEvent(const KeyEvent &key)
+ */
+bool Honoka::AsciiInput::keyEvent(const KeyEvent &key)
+{
     // ���äƤ����٤���Ρ�
     if ((key.code == SCIM_KEY_Shift_L) ||
         (key.code == SCIM_KEY_Shift_R) ||
@@ -87,17 +113,6 @@
         (key.code == SCIM_KEY_Hyper_L) ||
         (key.code == SCIM_KEY_Hyper_R)) return true;
 
-    return false;
-}
-
-
-
-/*!
-    \fn AsciiInput::keyEventHook(const KeyEvent &key)
- */
-bool AsciiInput::keyEventHook(const KeyEvent &key)
-{
-    if (key.is_key_release()) return false;
     if (isprint(key.get_ascii_code()) && (!key.is_alt_down()) && (!key.is_control_down())) {
         String c;
         c += key.get_ascii_code();
@@ -107,5 +122,3 @@
     }
     return false;
 }
-
-
diff --git a/honoka/plugins/asciiinput.h b/honoka/plugins/asciiinput.h
index 58ec23d..d649324 100644
--- a/honoka/plugins/asciiinput.h
+++ b/honoka/plugins/asciiinput.h
@@ -47,6 +47,10 @@
     virtual String getPropertyName();
     virtual bool keyEventHook(const KeyEvent &key);
 
+protected:
+    HonokaKeyEventList lowProprotyKey;
+protected:
+    bool keyEvent(const KeyEvent &key);
 };
 }
 #endif
diff --git a/honoka/plugins/asciiplugin.cpp b/honoka/plugins/asciiplugin.cpp
index ca5f4b9..b607587 100644
--- a/honoka/plugins/asciiplugin.cpp
+++ b/honoka/plugins/asciiplugin.cpp
@@ -49,6 +49,12 @@
         _("input the path of Words file."),
         HONOKA_DEFAULT_WORDSPREDICTION_FILE
     ));
+    page->append(new HonokaSetupKeyItem(
+        _("Low priority key: "),
+        String(HONOKA_CONFIG_ASCIIINPUT_LOW_PRIORITY_KEY),
+        _("set the key that lowers priority."),
+        String(HONOKA_DEFAULT_ASCIIINPUT_LOW_PRIORITY_KEY)
+    ));
 
     HonokaSetupPage *sc = new HonokaSetupPage(_("shortcut keys: "),"","");
     sc->append(new HonokaSetupKeyItem(
diff --git a/honoka/plugins/asciiplugin.h b/honoka/plugins/asciiplugin.h
index b9fd82b..e5e3418 100644
--- a/honoka/plugins/asciiplugin.h
+++ b/honoka/plugins/asciiplugin.h
@@ -35,6 +35,8 @@
 
 #define HONOKA_CONFIG_WORDSPREDICTION_FILE          "/IMEngine/Honoka/WordsPrediction/WordsFile"
 #define HONOKA_DEFAULT_WORDSPREDICTION_FILE         "/usr/share/dict/words"
+#define HONOKA_CONFIG_ASCIIINPUT_LOW_PRIORITY_KEY   "/IMEngine/Honoka/AsciiInput/LowPriorityKey"
+#define HONOKA_DEFAULT_ASCIIINPUT_LOW_PRIORITY_KEY  ""
 
 using namespace std;
 using namespace scim;
diff --git a/honoka/po/honoka.pot b/honoka/po/honoka.pot
index 418bb13..bcc2676 100644
--- a/honoka/po/honoka.pot
+++ b/honoka/po/honoka.pot
@@ -8,7 +8,7 @@
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2006-01-21 15:20+0900\n"
+"POT-Creation-Date: 2006-01-24 23:28+0900\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -447,7 +447,7 @@
 #: plugins/wnnplugin.cpp:78 plugins/anthyplugin.cpp:46
 #: plugins/simpleprediction.cpp:53 plugins/primeprediction.cpp:71
 #: plugins/skkdicconversion.cpp:53 plugins/cannaconversion.cpp:57
-#: plugins/asciiplugin.cpp:53
+#: plugins/asciiplugin.cpp:59
 msgid "shortcut keys: "
 msgstr ""
 
@@ -718,19 +718,27 @@
 msgid "input the path of Words file."
 msgstr ""
 
+#: plugins/asciiplugin.cpp:53
+msgid "Low priority key: "
+msgstr ""
+
 #: plugins/asciiplugin.cpp:55
-msgid "Ascii Input: "
+msgid "set the key that lowers priority."
 msgstr ""
 
 #: plugins/asciiplugin.cpp:61
+msgid "Ascii Input: "
+msgstr ""
+
+#: plugins/asciiplugin.cpp:67
 msgid "Words Prediction: "
 msgstr ""
 
-#: plugins/asciiinput.cpp:53
+#: plugins/asciiinput.cpp:56
 msgid "Aa"
 msgstr ""
 
-#: plugins/asciiinput.cpp:69
+#: plugins/asciiinput.cpp:72
 msgid "AsciiInput"
 msgstr ""
 
diff --git a/honoka/po/ja.po b/honoka/po/ja.po
index df31c24..7ec40bb 100644
--- a/honoka/po/ja.po
+++ b/honoka/po/ja.po
@@ -9,7 +9,7 @@
 msgstr ""
 "Project-Id-Version: ja\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2006-01-21 15:20+0900\n"
+"POT-Creation-Date: 2006-01-24 23:28+0900\n"
 "PO-Revision-Date: 2004-12-01 14:29+0900\n"
 "Last-Translator: ＴＡＭ (Teppei Tamra) <tam-t@par.odn.ne.jp>\n"
 "Language-Team: Japanese\n"
@@ -453,7 +453,7 @@
 #: plugins/wnnplugin.cpp:78 plugins/anthyplugin.cpp:46
 #: plugins/simpleprediction.cpp:53 plugins/primeprediction.cpp:71
 #: plugins/skkdicconversion.cpp:53 plugins/cannaconversion.cpp:57
-#: plugins/asciiplugin.cpp:53
+#: plugins/asciiplugin.cpp:59
 msgid "shortcut keys: "
 msgstr "ショートカットキー:"
 
@@ -726,19 +726,28 @@
 msgid "input the path of Words file."
 msgstr "単語ファイルを指定します"
 
+#: plugins/asciiplugin.cpp:53
+msgid "Low priority key: "
+msgstr "優先度を下げるキー:"
+
 #: plugins/asciiplugin.cpp:55
+msgid "set the key that lowers priority."
+msgstr ""
+"優先度を下げるキーを指定します。"
+
+#: plugins/asciiplugin.cpp:61
 msgid "Ascii Input: "
 msgstr "英数字入力:"
 
-#: plugins/asciiplugin.cpp:61
+#: plugins/asciiplugin.cpp:67
 msgid "Words Prediction: "
 msgstr "英単語予測:"
 
-#: plugins/asciiinput.cpp:53
+#: plugins/asciiinput.cpp:56
 msgid "Aa"
 msgstr "[Aa]"
 
-#: plugins/asciiinput.cpp:69
+#: plugins/asciiinput.cpp:72
 msgid "AsciiInput"
 msgstr "英数字入力"