diff --git a/MobileFilter/sections/specific_web.txt b/MobileFilter/sections/specific_web.txt
index 42d3b32db0a..9230fe441ee 100644
--- a/MobileFilter/sections/specific_web.txt
+++ b/MobileFilter/sections/specific_web.txt
@@ -80,6 +80,7 @@ sp.manga.nicovideo.jp##div[style^="--ads-width:"]
 !
 ! SECTION: Regular rules
 !
+katsushika-tsushin.com##.category2 > a[rel^="sponsored"][target="_blank"]
 funabashi-tsushin.com##a[href="https://funabashi-tsushin.com/banner_ads"]
 eromon.net##aside[style="min-height:312px;"]
 tvblog.it#$#body { margin-top: 0 !important; }