diff --git a/lib/domains/abused.txt b/lib/domains/abused.txt
index 7cea0cf433..710d092f29 100644
--- a/lib/domains/abused.txt
+++ b/lib/domains/abused.txt
@@ -1380,7 +1380,7 @@ daegu.ac.kr
 alumnos.cecyteg.edu.mx
 koreatech.ac.kr
 usal.es
-u.tsukuba.ac.jp
+tsukuba.ac.jp
 unsaac.edu.pe
 yrdsb.ca
 estudante.ifb.edu.br
diff --git a/lib/domains/jp/ac/tsukuba.txt b/lib/domains/jp/ac/tsukuba.txt
deleted file mode 100644
index 5e0b1fc3dc..0000000000
--- a/lib/domains/jp/ac/tsukuba.txt
+++ /dev/null
@@ -1 +0,0 @@
-University of Tsukuba