diff --git a/modules/libpref/src/init/all.js b/modules/libpref/src/init/all.js
index 7e61876d1a49..485d849c69fb 100644
--- a/modules/libpref/src/init/all.js
+++ b/modules/libpref/src/init/all.js
@@ -3027,10 +3027,10 @@ pref("font.name.monospace.he", "Droid Sans Mono");
 pref("font.name-list.sans-serif.he", "Droid Sans Hebrew, Droid Sans");
 
 pref("font.name.serif.ja", "Droid Serif");
-pref("font.name.sans-serif.ja", "Droid Sans Japanese");
+pref("font.name.sans-serif.ja", "Droid Sans");
 pref("font.name.monospace.ja", "MotoyaLMaru");
-pref("font.name-list.sans-serif.ja", "MotoyaLMaru, MotoyaLCedar, Droid Sans Japanese");
-pref("font.name-list.monospace.ja", "MotoyaLMaru, MotoyaLCedar");
+pref("font.name-list.sans-serif.ja", "Roboto, Droid Sans, MotoyaLMaru, MotoyaLCedar, Droid Sans Japanese");
+pref("font.name-list.monospace.ja", "MotoyaLMaru, MotoyaLCedar, Droid Sans Mono");
 
 pref("font.name.serif.ko", "Droid Serif");
 pref("font.name.sans-serif.ko", "Droid Sans");