Although I am no authority on the subject, I would say that If you want a Bonji tag, then ask for it. Your tattooer seems knowledgable enough to be able to advise you whether that is appropriate or not. If you really want to know, check out some of the books about Horiyoshi 3. I remember seing a section on Bonji tags and other signature marks on tattoos in one of the books I have. I am not at home now, so I couldnt tell you which.