LaTeX에서 일본어를 균등하게 할당하는 방법

\documentclass[b5paper,10pt]{ltjsarticle}

\usepackage{calc}
\usepackage{ifthen}
\usepackage{graphicx}

\makeatletter
\newlength{\wtarget}
\newlength{\wactual}
\newcommand*{\kintou}[2]{\kintouwidth{#1\zw}{#2}}
\newcommand*{\kintouwidth}[2]{%
    \setlength{\wtarget}{#1}%
    \settowidth{\wactual}{#2}%
    \ifthenelse{\lengthtest{\wtarget < \wactual}}{%
        \setlength{\wtarget}{1pt * \real{\strip@pt\wtarget} / \real{\strip@pt\wactual}}%
        \scalebox{\strip@pt\wtarget}[1]{#2}%
    }{%
        \makebox[\wtarget][s]{#2}%
    }%
}
\makeatother

\begin{document}

\begin{tabular}{ll}
\makebox[5\zw][s]{\textleftarrow\ 5字 \textrightarrow}
& \makebox[2cm][s]{\textleftarrow\ 2cm \textrightarrow}\\
\kintou{5}{寿限無寿限無五劫の擦り切れ} & \kintouwidth{2cm}{寿限無寿限無五劫の擦り切れ}\\
\kintou{5}{寿限無寿限無五劫} & \kintouwidth{2cm}{寿限無寿限無五劫}\\
\kintou{5}{寿限無寿限} & \kintouwidth{2cm}{寿限無寿限}\\
\kintou{5}{寿限無} & \kintouwidth{2cm}{寿限無}\\
\kintou{5}{寿限} & \kintouwidth{2cm}{寿限}\\
\end{tabular}

\end{document}

\NeedsTeXFormat{LaTeX2e}[1994/06/01]
\ProvidesPackage{kintou}[2020/07/27 Kintou waritsuke Package]

\RequirePackage{calc}
\RequirePackage{ifthen}
\RequirePackage{graphicx}

\makeatletter
\newlength{\wtarget}
\newlength{\wactual}
\newcommand*{\kintou}[2]{%
    \ifthenelse{\isundefined{\zw}}{\kintouwidth{#1zw}{#2}}{\kintouwidth{#1\zw}{#2}}%
}
\newcommand*{\kintouwidth}[2]{%
    \setlength{\wtarget}{#1}%
    \settowidth{\wactual}{#2}%
    \ifthenelse{\lengthtest{\wtarget < \wactual}}{%
        \setlength{\wtarget}{1pt * \real{\strip@pt\wtarget} / \real{\strip@pt\wactual}}%
        \scalebox{\strip@pt\wtarget}[1]{#2}%
    }{%
        \makebox[\wtarget][s]{#2}%
    }%
}
\makeatother

\endinput