diff --git a/honoka/src/honoka_def.h b/honoka/src/honoka_def.h
index c8d1207..d9d3c84 100644
--- a/honoka/src/honoka_def.h
+++ b/honoka/src/honoka_def.h
@@ -90,6 +90,9 @@
 #define HONOKA_CONFIG_KEY_RESULTTOPREEDIT          "/IMEngine/Honoka/Key/SetResultToPreEditor"
 #define HONOKA_DEFAULT_KEY_RESULTTOPREEDIT         "Control+Return"
 
+#define HONOKA_CONFIG_KEY_ALLRESET                 "/IMEngine/Honoka/Key/AllReset"
+#define HONOKA_DEFAULT_KEY_ALLRESET                "Control+Shift+Home"
+
 
 #define HONOKA_CONFIG_ALP                          "/IMEngine/Honoka/AutoLookupPopup"
 #define HONOKA_DEFAULT_ALP                         3
diff --git a/honoka/src/honoka_imengine.cpp b/honoka/src/honoka_imengine.cpp
index 80ef725..75f3f8b 100644
--- a/honoka/src/honoka_imengine.cpp
+++ b/honoka/src/honoka_imengine.cpp
@@ -165,18 +165,12 @@
 
 HonokaInstance::~HonokaInstance()
 {
-    HonokaTimer::destruct();
     if (save_setting) {
         _scim_config->write(String(HONOKA_PREVIOUS_PREEDITOR),m_preeditor->getName());
         _scim_config->write(String(HONOKA_PREVIOUS_PREDICTOR),m_predictor->getName());
         _scim_config->write(String(HONOKA_PREVIOUS_CONVERTOR),m_convertor->getName());
     }
-    for(unsigned int i = 0;i < plugins.size();i ++) {
-        plugins[i].deleteInstance(plugins[i].instance);
-        dlclose(plugins[i].dll);
-    }
-    delete acpredictor;
-    delete m_multi;
+    unload();
 }
 
 /*!
@@ -309,6 +303,25 @@
 
 
 /*!
+    \fn HonokaInstance::unload()
+ */
+void HonokaInstance::unload()
+{
+    HonokaTimer::destruct();
+    m_preeditor->reset();
+    for(unsigned int i = 0;i < plugins.size();i ++) {
+        plugins[i].deleteInstance(plugins[i].instance);
+        dlclose(plugins[i].dll);
+    }
+    convertors.clear();
+    preeditors.clear();
+    predictors.clear();
+    delete acpredictor;
+    delete m_multi;
+    plugins.clear();
+}
+
+/*!
     \fn HonokaInstance::init()
  */
 void HonokaInstance::init()
@@ -442,6 +455,9 @@
     scim_string_to_key_list(k_multi_conversion,
         _scim_config->read(String(HONOKA_CONFIG_KEY_MULTI_CONVERSION),
             String(HONOKA_DEFAULT_KEY_MULTI_CONVERSION)));
+    scim_string_to_key_list(k_allreset,
+        _scim_config->read(String(HONOKA_CONFIG_KEY_ALLRESET),
+            String(HONOKA_DEFAULT_KEY_ALLRESET)));
     for(unsigned i = 0;i < 10;i ++) {
         char a[3];
         sprintf(a,"%d",i);
@@ -847,6 +863,15 @@
  */
 bool HonokaInstance::process_preedit_key_event(const KeyEvent &key)
 {
+    if (k_allreset.comp(key)) {
+        unload();
+        loadPlugins();
+        init();
+        m_proplist.clear();
+        updateProperty();
+        updatePreEditor();
+        return true;
+    }
     if (!m_preeditor->getTextLength()) pStringType = NORMAL;
     // PreEdit時のキーイベント。
     // PreEditorのキーイベントフック。
diff --git a/honoka/src/honoka_imengine.h b/honoka/src/honoka_imengine.h
index 7ec3c53..65a0f70 100644
--- a/honoka/src/honoka_imengine.h
+++ b/honoka/src/honoka_imengine.h
@@ -166,6 +166,7 @@
     void createLookupTable(ResultList cList);
     void loadPlugins();
     void init();
+    void unload();
     void updatePreEditor();
     void updateProperty();
     void updateConversion();
@@ -213,6 +214,7 @@
         k_reconversion,         // 再変換
         k_result_to_preedit,    // 変換結果をPreEditorにpush
         k_furigana_commit,      // ふりがな付き確定
+        k_allreset,             // 機能全リセット
 
         // for Wnn7
         k_conversion_ikeiji,    // 異形字変換