We practice the traditional iai techniques of the Japanese police force, Keishi Cho. This tradition was developed during the Meiji period and is called Keishi Ryu.
Keishi Ryu is comprised of five techniques from various sources:

The intension was to develop a consistent and effective technique that could be taught to the police force.
Since this ryuha was developed by a committee, there is no "founder" or "Soke". I personally learned these kata from Roger Werhahn Shihan of the Nort American San Shin Kai. He in turn learned them from Mitsuzuka Takeshi who teaches them as part of the Muso Shinden Ryu curriculum.

We teach these kata to beginners before they start to learn other Iai / Batto or Kenjutsu Kata