diff --git a/honoka/plugins/honoka_plugin_def.h b/honoka/plugins/honoka_plugin_def.h
index f990ffa..8b29c97 100644
--- a/honoka/plugins/honoka_plugin_def.h
+++ b/honoka/plugins/honoka_plugin_def.h
@@ -49,4 +49,7 @@
 #define HONOKA_CONFIG_KANAINPUT_FAKEKANA           "/IMEngine/Honoka/KanaInput/FakeKanaKey"
 #define HONOKA_DEFAULT_KANAINPUT_FAKEKANA          true
 
+#define HONOKA_CONFIG_SIMPLEPREDICTION_SIZE        "/IMEngine/Honoka/SimplePrediction/Size"
+#define HONOKA_DEFAULT_SIMPLEPREDICTION_SIZE       200
+
 #endif
diff --git a/honoka/plugins/simpleprediction.cpp b/honoka/plugins/simpleprediction.cpp
index a2d4740..637910f 100644
--- a/honoka/plugins/simpleprediction.cpp
+++ b/honoka/plugins/simpleprediction.cpp
@@ -19,6 +19,7 @@
  ***************************************************************************/
 
 #include "simpleprediction.h"
+#include <honoka_plugin_def.h>
 
 #ifdef HAVE_CONFIG_H
   #include <config.h>
@@ -42,6 +43,8 @@
 
 SimplePrediction::SimplePrediction(ConfigPointer cfg) : Predictor(cfg)
 {
+    size = cfg->read(HONOKA_CONFIG_SIMPLEPREDICTION_SIZE,HONOKA_DEFAULT_SIMPLEPREDICTION_SIZE);
+    if (size < 0) size = 0;
 }
 
 
@@ -64,6 +67,7 @@
     }
     if (!tmp.size()) return ResultList();
     ResultList l;
+    l.Title = utf8_mbstowcs(String(_("lookup result")));
     l.kType = PREDICTION;
     for(multimap<WideString,WideString>::iterator it = tmp.begin();it != tmp.end();it ++) {
         l.kouho.push_back(ResultEntry(it->second));
@@ -121,8 +125,10 @@
 void SimplePrediction::update(const WideString str,const WideString yomi)
 {
     if ((!yomi.length()) || (!str.length())) return;
+    for(multimap<WideString,WideString>::iterator it = data.find(yomi);it != data.end();data.find(yomi))
+        if (it->second == str) return;
     data.insert(pair<WideString,WideString>(yomi,str));
-    if (data.size() > 200) data.erase(data.begin());
+    if (data.size() > size) data.erase(data.begin());
     return;
 }
 
diff --git a/honoka/plugins/simpleprediction.h b/honoka/plugins/simpleprediction.h
index 2df9e4d..6139aac 100644
--- a/honoka/plugins/simpleprediction.h
+++ b/honoka/plugins/simpleprediction.h
@@ -53,6 +53,7 @@
 
 protected:
     multimap<WideString,WideString> data;
+    int size;
 };
 
 #endif