Good question, not silly. Naihanchi without doubt is the core Kata for us where all the principals are encoded and exemplified. It is in 3 parts with the first part being most widely practised across various systems and styles. Obviously it contains its own fighting system and kihon drills to perfect agility, speed, power, movement and also develop a decent karate body with a nod towards bunkai, from which can be derived a full kumite system, including blocks, strikes, chokes, kicks, evasion, locks, take-downs and throws. It emphasises natural power and breathing and is saturated with the signature hip rotation/shaking (kohsi waza). Shorin Ryu Naihanchi is the older precursor to Tekki in Shotokan Karate and was also developed into Po Eun in ITF Taekwondo. This kata is equivalent of Sanchin in other systems where a scientific testing and conditioning procedure exists to optimize a practitioners mind and body.
