Many of those schools that teach the jujutsu/ taijutsu aspects of the art have codified the art into various levels including Shoden (first transmission), Chuden (middle level transmission), Okuden (hidden transmission), Kuden (oral transmission) amongst others.
Numerous martial arts schools that focus on jujutsu and taijutsu techniques have established a system of training levels, including Shoden (initial transmission), Chuden (intermediate transmission), Okuden (secret transmission), and Kuden (oral transmission).