diff --git a/scim-wnn/src/scim_wnn_imengine.cpp b/scim-wnn/src/scim_wnn_imengine.cpp
index a4b66a0..e4119e0 100644
--- a/scim-wnn/src/scim_wnn_imengine.cpp
+++ b/scim-wnn/src/scim_wnn_imengine.cpp
@@ -265,7 +265,13 @@
         return(true);
     }
     if ((key.code == SCIM_KEY_Left) || (key.code == SCIM_KEY_Right)) {
-        key.code == SCIM_KEY_Left ? wnn.setPos(wnn.getPos() - 1) : wnn.setPos(wnn.getPos() + 1);
+        if (key.mask == SCIM_KEY_ShiftMask) {
+            bool r;
+            key.code == SCIM_KEY_Left ? r = wnn.resizeRegion(-1) : r = wnn.resizeRegion(1);
+            if (!r) return(true);
+        } else {
+            key.code == SCIM_KEY_Left ? wnn.setPos(wnn.getPos() - 1) : wnn.setPos(wnn.getPos() + 1);
+        }
         m_convList = wnn.getConversionList();
         update_preedit_string(wnn.getText(),wnn.getAttributeList());
         return(true);
diff --git a/scim-wnn/src/wnnconversion.cpp b/scim-wnn/src/wnnconversion.cpp
index 93226e9..58c8040 100644
--- a/scim-wnn/src/wnnconversion.cpp
+++ b/scim-wnn/src/wnnconversion.cpp
@@ -118,6 +118,7 @@
 {
     yomiText.clear();
     bunList.clear();
+    yomiList.clear();
     text.clear();
     attr.clear();
     pos = 0;
@@ -141,6 +142,7 @@
     convList.Yomi.clear();
     convList.kouho.clear();
     bunList.clear();
+    yomiList.clear();
     pos = 0;
     w_char ws[1024];
     char c[2048];
@@ -149,17 +151,55 @@
     strtows(ws,(unsigned char*)y.data());
     bunsetu = jl_ren_conv(wnn,ws,0,-1,WNN_USE_ATO);
     bunList.resize(bunsetu);
+    yomiList.resize(bunsetu);
     for(unsigned int i = 0;i < bunsetu;i ++) {
         WideString w;
         wnn_get_area(wnn,i,i + 1,ws,1);
         wstostr((unsigned char*)c,ws);
         m_iconv.convert(w,c,strlen(c));
         bunList[i] = w;
+        wnn_get_area(wnn,i,i + 1,ws,0);
+        wstostr((unsigned char*)c,ws);
+        m_iconv.convert(w,c,strlen(c));
+        yomiList[i] = w;
     }
+    createText();
     return(bunsetu);
 }
 
 
+/*!
+    \fn WnnConversion::resizeRegion(int w)
+ */
+bool WnnConversion::resizeRegion(int w)
+{
+    if (w == 0) return(false);
+    if ((yomiList[pos].length() + w) <= 0)  return(false);
+    if (((pos + 1) >= yomiList.size()) && (w > 0)) return(false);
+
+    w_char ws[1024];
+    char c[2048];
+    int s;
+    bunsetu = jl_nobi_conv(wnn,pos,yomiList[pos].length() + w,-1,WNN_USE_ATO,WNN_SHO);
+    convList.kouho.clear();
+    bunList.clear();
+    bunList.resize(bunsetu);
+    yomiList.resize(bunsetu);
+    for(unsigned int i = 0;i < bunsetu;i ++) {
+        WideString w;
+        wnn_get_area(wnn,i,i + 1,ws,1);
+        wstostr((unsigned char*)c,ws);
+        m_iconv.convert(w,c,strlen(c));
+        bunList[i] = w;
+        wnn_get_area(wnn,i,i + 1,ws,0);
+        wstostr((unsigned char*)c,ws);
+        m_iconv.convert(w,c,strlen(c));
+        yomiList[i] = w;
+    }
+    createText();
+    return(true);
+}
+
 
 /*!
     \fn WnnConversion::createText()
@@ -234,6 +274,7 @@
     convList.pos = jl_zenkouho(wnn,pos,WNN_USE_ATO,WNN_UNIQ);
     convList.count = jl_zenkouho_suu(wnn);
     convList.kouho.resize(convList.count);
+
     for (unsigned int i = 0;i < convList.count; i ++) {
         w_char k[1024];
         char buf[2048];
@@ -265,3 +306,5 @@
 }
 
 
+
+
diff --git a/scim-wnn/src/wnnconversion.h b/scim-wnn/src/wnnconversion.h
index 5b8e9e3..82f6cc9 100644
--- a/scim-wnn/src/wnnconversion.h
+++ b/scim-wnn/src/wnnconversion.h
@@ -60,6 +60,7 @@
     WnnConversionList getConversionList(int p = -1);
     bool select(int p);
     AttributeList getAttributeList();
+    bool resizeRegion(int w);
 
 protected:
     void wstostr(unsigned char *e,w_char *u);
@@ -77,6 +78,7 @@
     int bunsetu;
     WideString text;
     vector<WideString> bunList;
+    vector<WideString> yomiList;
     AttributeList attr;
     WnnConversionList convList;
 
diff --git a/scim-wnn/src/wnnproto.h b/scim-wnn/src/wnnproto.h
index b89c5c6..a26e56b 100644
--- a/scim-wnn/src/wnnproto.h
+++ b/scim-wnn/src/wnnproto.h
@@ -36,6 +36,7 @@
     int jl_zenkouho_suu(struct wnn_buf*);
     void jl_get_zenkouho_kanji(struct wnn_buf*,int ,w_char *);
     int jl_set_jikouho(struct wnn_buf*,int);
+    int jl_nobi_conv(struct wnn_buf*,int,int,int,int,int);
 
     #define WNN_NO_USE    0
     #define WNN_USE_MAE   1
@@ -49,6 +50,9 @@
     #define WNN_NO_CREATE 0
     #define WNN_CREATE (-1)
 
+    #define WNN_SHO 0
+    #define WNN_DAI 1
+
     #define jl_get_kanji(buf,bun1,bun2,area) wnn_get_area(buf,bun1,bun2,area,1)
     #define jl_get_yomi(buf,bun1,bun2,area) wnn_get_area(buf,bun1,bun2,area,0)