-\setbox2=\hbox{\tate \unhbox2\global\setbox1=\lastbox}%% unwrap
-{\obeylines\tentt
-\directlua{luatexja.ext_show_node_list(tex.box[1], 'B> ', tex.print)}}
+\message{HOGE}
+\setbox0=\hbox{\tate \ltjsetwd1=50pt\immediate\message{PIYO}}
+
+{\obeylines\seventt\baselineskip=10pt\message{HOGE}\hbox{a}\message{HOGE}
+\directlua{luatexja.ext_show_node_list(tex.box[1], 'alter Twd> ', tex.print)}\par}
+
+\setbox0=\hbox{\yoko \ltjsetht1=70pt}
+{\obeylines\seventt\baselineskip=10pt
+\directlua{luatexja.ext_show_node_list(tex.box[1], 'alter Yht> ', tex.print)}\par}
+
+%% unwrap
+\setbox2=\hbox{\yoko \copy1}
+\setbox2=\hbox{\yoko \unhbox2\global\setbox1=\lastbox}
+{\obeylines\seventt
+\directlua{luatexja.ext_show_node_list(tex.box[1], 'unwrapped> ', tex.print)}}