\newluatexattribute\ltj@curtfnt % index for ``current vertical Japanese font''
\newluatexattribute\ltj@origchar %
\newluatexattribute\ltj@charclass %
+\newluatexattribute\ltj@charcode %
\newluatexattribute\ltj@autospc % attribute for autospacing
\newluatexattribute\ltj@autoxspc % attribute for autoxspacing
\newluatexattribute\ltj@yablshift % attribute for yalbaselineshift