+\section{slanted, extended}
+\DeclareFontShape{JY3}{mc}{m}{sl}{<-> s*[0.962216]
+ psft:Ryumin-Light:slant=0.25;jfm=ujiso25}{}
+\DeclareFontShape{JY3}{mc}{x}{n}{<-> s*[0.962216]
+ psft:Ryumin-Light:extend=1.5;jfm=ujisx50}{}
+\DeclareFontShape{JY3}{gt}{m}{sl}{<-> s*[0.962216]
+ file:ipag.ttf:slant=0.25;jfm=ujiso25}{}
+\DeclareFontShape{JY3}{gt}{x}{n}{<-> s*[0.962216]
+ file:ipag.ttf:extend=1.5;jfm=ujisx50}{}
+
+% for test
+\DeclareFontShape{JY3}{gt}{m}{ix}{<-> s*[0.962216]
+ file:ipag.ttf:slant=0.25;jfm=ujiso25}{}
+
+\paragraph{psft prefix でもOK?}\
+
+\textsl{日本語の機械的な斜体}直立,
+\textsl{あいう■\textup{■え■■}■おかき}
+
+{\fontfamily{mc}\fontseries{x}\selectfont あいう}
+
+\paragraph{TTF, OTFではOK}\
+
+\textgt{\textsl{日本語の機械的な斜体}直立,
+\textsl{あいう■\textup{■え■■}■おかき}}
+
+{\fontfamily{gt}\fontseries{x}\selectfont あいう}
+
+\paragraph{italic correction inserted by {\tt\char92text...}}\
+
+font series `ix': 欧文は未定義,和文は機械的斜体.
+
+{\gt■\textix{■あabcい■\textup{■うxyzえ■■}■おpqrか■}■}
+
+{\gt■f\textix{f■あい■f\textup{f■うえ■■f}f■おか■f}f■}
+
+イタリック補正なし:{\gt {\slshape ■}■}
+イタリック補正あり:{\gt {\slshape ■\/}■}
+
+\newpage{\obeylines\tt
+\setbox0=\hbox{\gt\textsl{あいう■\textup{■え■}■おかき}}
+\directlua{luatexja.ext_show_node_list(tex.box[0].head, '', tex.print)}\par}
+
+\bigskip
+
+正しい補正量:$0.962216\times 10 \times 0.88\times 0.25 \simeq
+\directlua{tex.print(0.962216*10*0.88*0.25)}\,\textrm{pt}$
+
+\paragraph{fontfamily}\
+\makeatletter
+\def\TEST#1{\par{\fontfamily{#1}\selectfont あいうabc: font\hfill(#1: \k@family, \f@family)}}
+
+\gt
+\TEST{mc}
+\TEST{fuga}
+\TEST{fuga}
+\TEST{mc}
+
+{\fontfamily{hoge}\selectfont あいうabc: font\hfill(\k@family, \f@family)}
+
+{\romanfamily{hoge}\selectfont あいうabc: roman\hfill(\k@family, \f@family)}
+
+{\kanjifamily{hoge}\selectfont あいうabc: kanji\hfill(\k@family, \f@family)}
+
+\TEST{mc}
+\TEST{ptm}
+\TEST{ptm}
+
+\makeatletter
+\let\@@fontfamily=\fontfamily
+\def\fontfamily#1{(\k@family, \f@family)\@@fontfamily{#1}(\k@family, \f@family)}
+
+あい{うえお\texttt{abc}\globaldefs1あ\/い}うえお