I love how you gave everyone with irezumi the title of their tattoos but later gave Nishiki as "kyoudai" and Kazama as "chichi". It made me realize these two were part of more than half of Kiryu's life all the way to 7.
"It was anciently believed that the creature ate our bad dreams and evil experiences, and for this reason, people, wishing it to eat up all the ills which we are likely to suffer, used to hang its picture on the entrance gate or inside the house."
