Rounded corner with three chiseled patterns shower curtain

The character pattern, square character pattern, or square pattern / Sumikiri kakuni chijimi is also called "Oshiki." For example, in "Seishi Monsho Okuni Meguri Saikokuhen" by Danwa Motoji, it is written as "Oshiki ni chijimi sanmonji." The shape of the contraction represents a wave. This design is based on the same book and "Monjo." The Oshiki ni sanmonji pattern is the crest of Mishima Daimyojin. Sumikiri kaku refers to an octagon with cut corners, with the character "three" inside, making it a crest. In the past, when serving food to the gods, tree branches such as oak leaves were folded and used as serving utensils. Later, a square tray was made from a piece of cypress, also called "Oshiki," and used. A stand with holes on three sides was attached to this tray,