It is also known as Kito-ryu no Kata. It consists of 21 techniques originally belonging to the Kito School of jujutsu. Jigoro Kano revised the techniques and incorporated them into a kata in order to preserve the historical source of judo.
Although koshiki-no-kata is not often seen in the United States, it is still taught and practiced in Japan. Some striking demonstrations of it from the 1950s can be seen in the film "Classic Judo Kata," by Hal Sharp. If the description of the kata in that film is correct, it would be the only judo kata that involves attacking the cervical spine.