diff --git a/honoka/src/honoka_imengine.cpp b/honoka/src/honoka_imengine.cpp
index 53daba3..7fc091a 100644
--- a/honoka/src/honoka_imengine.cpp
+++ b/honoka/src/honoka_imengine.cpp
@@ -1400,8 +1400,12 @@
     int p = m_convList.pos - m_lookup_table.get_current_page_size();
     if (p < 0) p = 0;
     m_convList.pos = p;
-    if (!m_no_update) m_convertor->select(m_convList.pos);
-    updateConvertedString();
+    if ((!m_no_update) && (m_conversion)) m_convertor->select(m_convList.pos);
+    if (m_conversion) updateConvertedString();
+    if (m_prediction) {
+        update_preedit_string(m_convList.kouho[m_convList.pos].kanji);
+        update_preedit_caret(0);
+    }
     m_lookup_table.set_cursor_pos(m_convList.pos);
     update_aux_string(m_convList.Title + getPosPerCount(m_convList.pos,m_convList.count()));
     show_aux_string();
@@ -1418,8 +1422,12 @@
     int p = m_convList.pos + m_lookup_table.get_current_page_size();
     if (p >= m_convList.count()) p = m_convList.count() - 1;
     m_convList.pos = p;
-    if (!m_no_update) m_convertor->select(m_convList.pos);
-    updateConvertedString();
+    if ((!m_no_update) && (m_conversion)) m_convertor->select(m_convList.pos);
+    if (m_conversion) updateConvertedString();
+    if (m_prediction) {
+        update_preedit_string(m_convList.kouho[m_convList.pos].kanji);
+        update_preedit_caret(0);
+    }
     m_lookup_table.set_cursor_pos(m_convList.pos);
     update_aux_string(m_convList.Title + getPosPerCount(m_convList.pos,m_convList.count()));
     show_aux_string();