\directlua{luatexbase.add_to_callback('luatexja.load_jfm',
function (ji, jn) ji.chars['parbdd'] = 0; return ji end,
'ltj.jclasses_load_jfm', 1)}
\directlua{luatexbase.add_to_callback('luatexja.load_jfm',
function (ji, jn) ji.chars['parbdd'] = 0; return ji end,
'ltj.jclasses_load_jfm', 1)}