The five Heian kata were adopted from much older kata by Itosu Anko and so their origins can be traced all the way back to China and the orgins of karate. Translated as "Peaceful mind" the name is said to come from an Okinawan saying Heiwa-antei "peace and calmness". The name suggests that the student who has mastered these Kata can be confident in their skills and therefore be of a "Peaceful Mind".
These three kata make up the core and foundation of Shurite Kempo.
Naihanchi is the beginning kata in Shurite Kempo, it is the foundation of all Shurite Kempo technique.
Shuri Seisan Kata
Seisan kata is the nails and glue that binds kata and two man technique together.
Kusanku is the framework and structure of the Shurite Kempo system.