\jfont\rmlk={psft:Ryumin-Light:jfm=test} at 12pt
\setbox0=\hbox{\rmlk は\rmlh あ}\dumplist0}
\def\naspc{\ltjsetparameter{autospacing=false}\relax}
\def\naxspc{\ltjsetparameter{autoxspacing=false}\relax}
\jfont\rmlk={psft:Ryumin-Light:jfm=test} at 12pt
\setbox0=\hbox{\rmlk は\rmlh あ}\dumplist0}
\def\naspc{\ltjsetparameter{autospacing=false}\relax}
\def\naxspc{\ltjsetparameter{autoxspacing=false}\relax}