“Yaedatami” or an eightfold straw mat is a tatami specially prepared for use in religious services. A craftsman folds “tatamiomote” or woven soft rush straws with edging of specially designed Nishijin brocade several times over so as to perfectly align patterns of creases of the folded edgings. We use the design to schematically illustrate the somitogenesis in vertebrates. As the U‐shaped presomitic mesoderm moves tailward, periodic waves of gene expression form pairs of somites one after another from the anterior end. “Otoshine” or the top cushion has a mark of an embryo woven into it. If you carefully look at the edging of “otoshine”, you can find it bears the process of segmentation in Drosophila, a species which forms all of its segments simultaneously. Cooperated by Isogaki Tatami (Kyoto, Japan); Designed by TRAIS Co., Ltd. (Kobe, Japan)