1 \documentclass{ltjsarticle}
3 \usepackage[sourcehan-jp,nfssonly]{luatexja-preset}
4 \usepackage{luatexja-ruby}
8 \setbox0=\hbox{\tate あ〳〵あ〱あ――あ——明}\leavevmode\vrule\copy0\vrule
9 {\ttfamily\tiny\directlua{%
10 luatexja.ext_show_node(tex.getbox(0), '\string\\par> ', tex.print)
14 \setbox0=\hbox{\yoko あ〳〵あ〱あ――あ——明}\par
18 {\ttfamily\tiny\directlua{%
19 luatexja.ext_show_node(tex.getbox(0), '\string\\par> ', tex.print)
23 \setbox2=\hbox{明日\Uchar`#1\Uchar`#1明日}
24 \leavevmode #1~(\texttt{\the\numexpr`#1}): \vrule\copy2\vrule\par}