--- a/modules/libpref/init/all.js
+++ b/modules/libpref/init/all.js
@@ -3434,19 +3434,25 @@ pref("font.name-list.sans-serif.el", "Ar
 pref("font.name-list.monospace.el", "Courier New");
 pref("font.name-list.cursive.el", "Comic Sans MS");
 
 pref("font.name-list.serif.he", "Narkisim, David");
 pref("font.name-list.sans-serif.he", "Arial");
 pref("font.name-list.monospace.he", "Fixed Miriam Transparent, Miriam Fixed, Rod, Courier New");
 pref("font.name-list.cursive.he", "Guttman Yad, Ktav, Arial");
 
+#ifdef EARLY_BETA_OR_EARLIER
+pref("font.name-list.serif.ja", "Yu Mincho, MS PMincho, MS Mincho, Meiryo, Yu Gothic, MS PGothic, MS Gothic");
+pref("font.name-list.sans-serif.ja", "Meiryo, Yu Gothic, MS PGothic, MS Gothic, Yu Mincho, MS PMincho, MS Mincho");
+pref("font.name-list.monospace.ja", "MS Gothic, MS Mincho, Meiryo, Yu Gothic, Yu Mincho, MS PGothic, MS PMincho");
+#else
 pref("font.name-list.serif.ja", "MS PMincho, MS Mincho, MS PGothic, MS Gothic,Meiryo");
 pref("font.name-list.sans-serif.ja", "MS PGothic, MS Gothic, MS PMincho, MS Mincho,Meiryo");
 pref("font.name-list.monospace.ja", "MS Gothic, MS Mincho, MS PGothic, MS PMincho,Meiryo");
+#endif
 
 pref("font.name-list.serif.ko", "Batang, Gulim");
 pref("font.name-list.sans-serif.ko", "Gulim");
 pref("font.name-list.monospace.ko", "GulimChe");
 pref("font.name-list.cursive.ko", "Gungsuh");
 
 pref("font.name-list.serif.th", "Tahoma");
 pref("font.name-list.sans-serif.th", "Tahoma");