\documentclass{ltjarticle}
\usepackage[margin=15mm,centering]{geometry}
\usepackage{lltjext,xcolor}
%\usepackage{lua-visual-debug}
\begin{document}
\def\V#1{%
  \setbox0=\hbox to0pt{\yoko\hss\smash{#1}　\kern-\zw\hss}%
  \box0\relax
}
\def\YL{\rlap{\textcolor{magenta}{\vrule height 0.0625mm depth 0.0625mm width 500pt}}}
\def\TEST#1{\smash{\hbox to 0pt{\tate%
  \kern120pt\YL%
  \tfont\A=#1:jfm=ujisv at 10pt\A
  \jfont\B=#1:jfm=ujis at 10pt\B
  国\V Ｔ\V ｙ\V ｐ\V ｏ\V ｇ\V ｒ\V ａ\V ｐ\V ｈ\V ｙ国\V Ｑ国
  \V Ｊ国\V{\ltjjachar`Å}国
  \hss}}%
  \smash{\hbox to 0pt{\tate%
  \hbox to 120pt{\ttfamily #1\hss}\YL%
  \tfont\A=#1:jfm=ujisv at 10pt\A
  国Ｔｙｐｏｇｒａｐｈｙ国Ｑ国Ｊ国\ltjjachar`Å国\ltjjachar"3031国
  \hss}}\quad}

\def\TL{\smash{\rlap{\hbox to 0pt{\tate%
  \kern120pt\color{cyan}\kern-0.0625mm%
  \vrule height 400pt depth 0pt width 0.125mm\kern\dimexpr10pt-0.125mm%
  \vrule height 400pt depth 0pt width 0.125mm\kern\dimexpr10pt-0.125mm%
  \vrule height 400pt depth 0pt width 0.125mm\kern\dimexpr10pt-0.125mm%
  \vrule height 400pt depth 0pt width 0.125mm\kern\dimexpr10pt-0.125mm%
  \vrule height 400pt depth 0pt width 0.125mm\kern\dimexpr10pt-0.125mm%
  \vrule height 400pt depth 0pt width 0.125mm\kern\dimexpr10pt-0.125mm%
  \vrule height 400pt depth 0pt width 0.125mm\kern\dimexpr10pt-0.125mm%
  \vrule height 400pt depth 0pt width 0.125mm\kern\dimexpr10pt-0.125mm%
  \vrule height 400pt depth 0pt width 0.125mm\kern\dimexpr10pt-0.125mm%
  \vrule height 400pt depth 0pt width 0.125mm\kern\dimexpr10pt-0.125mm%
  \vrule height 400pt depth 0pt width 0.125mm\kern\dimexpr10pt-0.125mm%
  \vrule height 400pt depth 0pt width 0.125mm\kern\dimexpr10pt-0.125mm%
  \vrule height 400pt depth 0pt width 0.125mm\kern\dimexpr10pt-0.125mm%
  \vrule height 400pt depth 0pt width 0.125mm\kern\dimexpr10pt-0.125mm%
  \vrule height 400pt depth 0pt width 0.125mm\kern\dimexpr10pt-0.125mm%
  \vrule height 400pt depth 0pt width 0.125mm\kern\dimexpr10pt-0.125mm%
  \vrule height 400pt depth 0pt width 0.125mm\kern\dimexpr10pt-0.125mm%
  \vrule height 400pt depth 0pt width 0.125mm\kern\dimexpr10pt-0.125mm%
  \vrule height 400pt depth 0pt width 0.125mm\kern\dimexpr10pt-0.125mm%
}}}}

\leavevmode
\TL
\TEST{IPAExMincho}
\TEST{HiraMinProN-W3}
\TEST{KozMinPr6N-Regular}
\TEST{YuMincho}
\TEST{SourceHanSerif-Regular}

\end{document}

