Hello, In the Peter Engel's book "Origami from Angelfish to Zen" (Dover publications, 1989), one can find a reference to origami as diploma in the following paragraph :
« By the Heian period, from 794 to 1185, origami has become a significant part of the ceremonial life of the Japanese nobility. Since paper was still a rare and precious commodity, paperfolding was a diversion only the rich could afford. Samurai warriors exchanged gifts adorned with noshi, good-luck tokens of folded paper and strips of abalone or dried meat. Shinto noblemen celebrated weddings with glasses of sake, rice wine, wrapped in male and female paper butterflies representing the bride and groom. Tea ceremony masters received their diplomas specially folded to prevent misuse in case the documents should fall into the wrong hands. (Once the paper was opened, it could not be released without allowing extra creases to show.) Even today, the expression origami tsuki means "certified" or "guaranteed". » Does anybody know how such origami diplomas and "origami tsuki" look like ? Thanks, Étienne Cliquet
