As an example of the former case, it is recorded in "Nihon Sandal Jitsuroku" (a history book written in the Heian period) that FUJIWARA no Tamiko, one of the wives of Emperor Seiwa copied the Lotus Sutra on paper made of melted letters that had been written by the Emperor when he was alive.
前者の例として『日本三代実録』に清和天皇の没後に后の1人である藤原多美子が生前の手紙を漉き返して法華経を写経したと記録されている。