local id_whatsit = node.id('whatsit')
local attr_icflag = luatexbase.attributes['ltj@icflag']
local attr_jchar_class = luatexbase.attributes['ltj@charclass']
-local lang_ja = token.create('ltj@@japanese')[2]
+local lang_ja = luatexja.lang_ja
local ltjf_font_metric_table = ltjf.font_metric_table
local spec_zero_glue = ltjj.spec_zero_glue