It is a manuscript that included the structure of that school, oral lesson, methods, or secret techniques that granted to an heir or the one who received mokuroku (a certificate of the completion of the art) or a permit from the master.
主にその流派の形の名、口伝、奥義や秘伝を記し、師匠が流派の後継者、あるいは目録、免許を与えた者に限って授けるような書物である。