\documentclass[b5j,12pt]{ltjtarticle}
\oddsidemargin=-1in \topmargin=-1in
\headheight0pt \topskip0.5\zw \headsep0pt \maxdepth0.5\zw
\footskip0pt \textwidth257mm \textheight182mm
\usepackage{bxjalipsum,xcolor}
\begin{document}
\baselineskip\dimexpr\textheight-1\zw
\divide\baselineskip 26
\jalipsum[2-7]{wagahai}

\ttfamily\baselineskip=2em
\makeatletter
\leavevmode
\end{document}



