The most obvious observation, when watching these katas, is the fact they move in a straight line. The embusen for this kata has been much analysed by karateka and historians. Many believe this represents that the karateka is fighting on horseback; others believe that it represents the karateka fighting with his back against a wall. While others say the kata was developed for fighting on a boat.
Debate aside, this kata is the intermediate of the Tekki Series, and like the others, it places much emphasis on rooting, power and stability. Unlike Tekki Shodan, originally a shuri-te kata, Nidan and Sandan were created by Master Itosu, but maintaining many of the concepts that made Shodan such a vital training aid.