hm, it happens only with Japanese locale.
$ env LC_ALL=en_US.UTF-8 fc-match Ryumin fonts-japanese-mincho.ttf: "TakaoPMincho" "Regular"
$ env LC_ALL=ja_JP.UTF-8 fc-match Ryumin fonts-japanese-gothic.ttf: "Takao Pゴシック" "Regular"
hm, it happens only with Japanese locale.
$ env LC_ALL=en_US.UTF-8 fc-match Ryumin mincho. ttf: "TakaoPMincho" "Regular"
fonts-japanese-
$ env LC_ALL=ja_JP.UTF-8 fc-match Ryumin gothic. ttf: "Takao Pゴシック" "Regular"
fonts-japanese-