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diff --git a/macros/luatex/generic/luatexja/doc/luatexja-ruby.tex b/macros/luatex/generic/luatexja/doc/luatexja-ruby.tex
index a01994faa7..3148d1df9e 100644
--- a/macros/luatex/generic/luatexja/doc/luatexja-ruby.tex
+++ b/macros/luatex/generic/luatexja/doc/luatexja-ruby.tex
@@ -45,6 +45,31 @@
\DeclareFontShape{JY3}{mc}{mc}{n}{<-> [0.92487]
HaranoAjiMincho-Regular:extend=0.67;jfm=ujisc33}{}
+%%%% \ltjruby 内に \texorpdfstring + | 除去を仕込む
+\RequirePackage{xparse}
+\makeatletter
+\def\removevert#1{\if\noexpand#1|%
+ \expandafter\expandafter\expandafter\@firstofone\expandafter{%
+ \else\ifnum0=1}\fi#1%
+ \ifx#1\relax\expandafter\@gobble%
+ \else\expandafter\@firstofone
+ \fi{\expandafter\@firstofone
+ \fi
+ \removevert}}
+\makeatother
+\ExplSyntaxOn
+\cs_set_eq:NN \myorigltjruby \ltjruby
+\DeclareExpandableDocumentCommand {\ltjruby} { O{} m m } {%
+ \texorpdfstring {
+ \exp_not:n { \myorigltjruby[#1]{#2}{#3} }
+ } {
+ \removevert #2 \relax
+ }
+}
+\cs_set_eq:NN \ruby \ltjruby
+\ExplSyntaxOff
+%%%%
+
\title{\textsf{luatexja-ruby}パッケージ}
\author{\LuaTeX-jaプロジェクトチーム}
\date{\texttt{\csname ver@luatexja-ruby.sty\endcsname}(\today)}