- \expandafter\ltj@@IsFontJapaneseX#1//:%
- \expandafter\expandafter\expandafter
- \inlist@\expandafter\tmp@item\expandafter{\kenc@list}}
-\def\ltj@@IsFontJapaneseX#1/#2/:{\edef\tmp@item{{\directlua{%
- tex.print(luatexbase.catcodetables["latex-package"], '#1')}%
-}}}
+ \directlua{luatexja.jfont.is_kenc(string.match(
+ '\luatexluaescapestring{#1}', '[^/]+'))}}