\documentclass{article}

\usepackage{fontspec}
\usepackage{xeCJK}
\usepackage{ruby}
\usepackage{longtable}
\usepackage{parskip}
\usepackage{booktabs}

\usepackage[portrait,paper=a4paper,total={6in,8in}]{geometry}

\usepackage[dvipsnames, table]{xcolor}
\definecolor{rowColor}{RGB}{64, 120, 20}

\setmainfont{Noto Sans}
\setCJKmainfont{Noto Sans CJK JP}

\rowcolors{1}{}{rowColor!30!white}

\setlength{\parindent}{0pt}
\setlength{\parskip}{\baselineskip}

\renewcommand{\rubysep}{1mm}

\begin{document}

% --- %

\end{document}