diff --git a/Casks/firefox-nightly-ja.rb b/Casks/firefox-nightly-ja.rb
index cf0abf393..4478547f6 100644
--- a/Casks/firefox-nightly-ja.rb
+++ b/Casks/firefox-nightly-ja.rb
@@ -3,7 +3,6 @@ cask 'firefox-nightly-ja' do
   sha256 :no_check # required as upstream package is updated in-place
 
   url "https://ftp.mozilla.org/pub/firefox/nightly/latest-mozilla-central-l10n/firefox-#{version}.ja.mac.dmg"
-  name 'Firefox'
   name 'Mozilla Firefox'
   homepage 'https://nightly.mozilla.org/'
   license :mpl