The art was brought to Japan from Korea by Chan Buso in the 16th century, but it wasn't until two generations later that it formally became became Koto Ryu Koppojutsu; Sakagami Taro Kunishige, the man responsible for organising it.
Formal Techniques of Koto Ryu
As with most other koryu, the densho (scrolls) are arranged in a particular order, and each Waza (Technique), Kata (Forms), etc are supposed to be learnt in the same order, mastering one before going on to the next one.