diff --git a/honoka/libhonoka/preeditor.cpp b/honoka/libhonoka/preeditor.cpp
index 19215d4..076556f 100644
--- a/honoka/libhonoka/preeditor.cpp
+++ b/honoka/libhonoka/preeditor.cpp
@@ -67,6 +67,7 @@
 map<ucs4_t,WideString> PreEditor::hKanaChars;
 int PreEditor::pos = 0;
 IConvert PreEditor::iconvert;
+WideString PreEditor::commitString = WideString();
 
 /*!
     \fn PreEditor::getPos()
@@ -387,3 +388,30 @@
 {
     return;
 }
+
+
+/*!
+    \fn Honoka::PreEditor::getCommitString()
+ */
+const WideString Honoka::PreEditor::getCommitString()
+{
+    return commitString;
+}
+
+
+/*!
+    \fn Honoka::PreEditor::setCommitString(const WideString &t)
+ */
+void Honoka::PreEditor::setCommitString(const WideString &t)
+{
+    commitString = t;
+}
+
+
+/*!
+    \fn Honoka::PreEditor::resetCommitString()
+ */
+void Honoka::PreEditor::resetCommitString()
+{
+    commitString.clear();
+}
diff --git a/honoka/libhonoka/preeditor.h b/honoka/libhonoka/preeditor.h
index bc62090..60dffef 100644
--- a/honoka/libhonoka/preeditor.h
+++ b/honoka/libhonoka/preeditor.h
@@ -89,6 +89,8 @@
     virtual AttributeList getAttributeList();
     virtual void selected();
     virtual void unSelected();
+    static const WideString getCommitString();
+    static void resetCommitString();
 
 protected:
     static WideString text;
@@ -97,7 +99,10 @@
     ConfigPointer config;
     static WideString convChars;
     static map<ucs4_t,WideString> hKanaChars;
+    static WideString commitString;
 
+protected:
+    static void setCommitString(const WideString &t);
 };
 
 }