字母ルビー（複数行のふりがな＋自動括弧）

jiboruby.tex

\documentclass[article, lualatex, [...], tate, landscape]{jlreq}
\usepackage{pythontex}
[...]

\begin{pycode}
def addparen(string):
  result = "\\vspace{-0.8\\zh}"
  for char in string:
    result += ("\\tatechuyoko{（" + char + "）}" if char != "　" else "　")
  return result
\end{pycode}
\newcommand{\addparen}[1]{\py{addparen("#1")}}
\newcommand{\jibo}[2]{\shortstack{\addparen{#2}\\#1}}
\newcommand{\jruby}[3]{\ruby{#1}{\jibo{#2}{#3}}}

[...]

\begin{document}
\jruby{山茶}{つばき}{　者　}
\end{document}