What is “nkf” Package? Network Kanji code conversion Filter (NKF) For more details: https://osdn.jp/projects/nkf/ Installation Open Terminal by pressing command+space then type terminal and hit Enter key. Install homebrew first. ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" < /dev/null 2> /dev/null Install nkf. brew install nkf Now, use nkf!