Shotokan  Funakoshi had many students at the university clubs and outside dojos, who continued to teach karate after his death in 1957. However, internal disagreements (in particular the notion that competition is contrary to the essence of karate) led to the creation of different organisations—including an initial split between the Japan Karate Association (headed by Masatoshi Nakayama) and the Shotokai (headed by Motonobu Hironishi and Shigeru Egami), followed by many others—so that today there is no single "Shotokan school", although they all bear Funakoshi's influence. As the most widely practiced style, Shotokan is considered a traditional and influential form of karate do. "Shotokan" was the name of the first official dojo built by Gichin Funakoshi, in 1936 at Mejiro, and destroyed in 1945 as a result of an allied bombing. , meaning "pine-waves" (the movement of pine needles when the wind blows through them), was Funakoshi's pen-name, which he used in his poetic and philosophical writings and messages to his students. The Japanese means "house" or "hall". In honour of their sensei, Funakoshi's students created a sign reading "shōtō-kan", which they placed above the entrance of the hall where Funakoshi taught. Gichin Funakoshi never gave his system a name, just calling it "karate". Shotokan training is usually divided into three parts: "kihon" (basics), "kata" (forms or patterns of moves), and "kumite" (sparring). Techniques in "kihon" and "kata" are characterised by deep, long stances that provide stability, enable powerful movements, and strengthen the legs. Shotokan is regarded as a dynamic martial art as it develops anaerobic, powerful techniques as well as developing speed. Initially strength and power are demonstrated instead of slower, more flowing motions. Those who progress to brown and black belt level develop a much more fluid style that incorporates grappling, throwing and some standing joint locking techniques, which can be found even in basic kata. "Kumite" (fighting) techniques are practised in the kihon and kata and developed from basic to advanced levels with an opponent. Gichin Funakoshi laid out the Twenty Precepts of Karate (or Niju kun), which form the foundations of the art, before some of his students established the Japan Karate Association (JKA).