The Pyong Ahn hyung are a series of five forms cognate in many ways to the pinan kata series of karate. They were reorganized by Master Itosu, an Okinawan practitioner of Tote and mentor of Funakoshi Gichin. They were originally a single form called Jae Nam (Channan). To make them easier to learn and safer for younger practitioners, the form was divided, and the more dangerous and lethal techniques were removed. These newly organized hyung were designed as training forms to prepare for Kong Sang Koon (Kusanku). For a more comprehensive description of these hyung see Pinan Kata.