Later, the thick karakami (Chinese paper) which concealed easily was introduced and its application to shoji spread, the difference between fusuma-shoji, and karakami-shoji (paper sliding-door made of imported Chinese paper) became blurred and they were used together so paper covered shoji, other than silk shoji, were also called fusuma.
のちに、隠蔽性の高い厚手の唐紙が伝来して障子に用いられて普及していくが、襖障子と唐紙障子は混同され併用されて、絹張りでない紙張り障子も襖と称されていく。