diff --git a/plugins/Referrers/SearchEngine.php b/plugins/Referrers/SearchEngine.php
index 821eb5f909f6175471f725bef96b192ffad1279e..6b8cea6eb55986915bbe28ca315c4eace837f379 100644
--- a/plugins/Referrers/SearchEngine.php
+++ b/plugins/Referrers/SearchEngine.php
@@ -290,7 +290,7 @@ class SearchEngine extends Singleton
                     if (empty($key)
                         && (
                             // Google / Yahoo search with no keyword
-                            (($searchEngineName == 'Google' || $searchEngineName == 'Yahoo!')
+                            (($searchEngineName == 'Google' || $searchEngineName == 'Yahoo!' || $searchEngineName == 'Yahoo! Japan')
                                 && (empty($query) && (empty($referrerPath) || $referrerPath == '/' || $referrerPath == '/search') && empty($referrerParsed['fragment']))
                             )