Ama in the Shima region has traditionally stamped hand towels and beach fleas on the patterns of evil guards called "Seiman" and "Dorman". It is generally said that the star shape is Seiman and the lattice shape is Doman. 
 The amulet's mark is sewn on with dark blue thread, or written with purple broth juice. In addition, I carve it in the pattern of the beach chisel. 
 It is said that "Seman", a seal of evil, is influenced by Haruaki Abe of Yin and Yang, and "Dorman" is influenced by Mitsumitsu Ashiya. It is believed that the star shape is a sign of a talisman because it comes back to the same place with a single stroke, so it will always come back (up) even if you dive, or because it is difficult for the devil to enter because you do not know the entrance and exit.