/usr/lib/juman/dic/Noun.koyuu.dic is in juman-dic 5.1-2.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/juman/dic/../../../share/juman/dic/Noun.koyuu.dic
/usr/lib/juman/dic/../../../share/juman/dic/Noun.koyuu.dic