Michael Calandra demonstrates the Naihanchi Kata and Bunkai of Isshin-Ryu Karate. This video is endorsed by Master Kichiro Shimabuku Headmaster of Isshin-Ryu.
Naihanchi (ナイハンチ) or Tekki (鉄騎) is a karate Kata, performed in straddle stance. The form makes use of in-fighting techniques (i.e. tai sabaki (whole body movement)) and grappling. There are three modern kata derived from this Shodan, Nidan and Sandan. (Source: http://en.wikipedia.org/wiki/Naihanchi)
See the kata demonstration in the following ryus:
Dr. Ilija Jorga explains the bunkai of tekki shodan. He is the founder of International Fudokan Karate do Renmei since 1980. Fudokan karate encompasses personal, moral and ethical guidelines identical to those described by Gichin Funakoshi – the moral code of traditional karate.