small information about kata "annan"

annan kata:

which is a traditional method of recording a sequence of movements for offense and defense. The origin and creator of this kata is unknown, but it's preservation and appearance in Okinawa can be credited to Nakaima Norisato, an Okinawan martial artist that was able to fully document and record fighting techniques learned by during his study and travels in China. Nakaima, a Chinese scholar, studied with the top Chinese martial arts practitioners in the Beijing area during the mid 19th century

It is known that this kata has been passed down through an old family style of Karate called Ryūei-ryū. This style of karate still exists today, with the techniques passed down to only seven chief instructors worldwide. Norisato Nakaima is credited with bringing the kata to Naha after learning it during his study in China. The techniques learned by Nakaima were handed down only within the family until the late 1960s. Among the more renowned practitioners of Ryueiryu are the former multiple world champion T. Sakumoto, T. Arashiro, an Okinawan residing in the United States since 1979 teaching sport Karate and G. Campbell, an American practitioner of Oriental Medicine that teaches the family art privately.