Bassai (To Penetrate a Fortress)
Bassai-Dai is a kata of forty two movements performed in a " T " pattern. It is a very powerful kata with sections performed fast and others performed slowly to emphasis their power.
Many of the techniques are performed in horse riding stance (Kiba Dachi) and this again supports the feeling of solidity and power. The name refers to the initial movements where the practitioner seems to be "crashing through the gates of a fortress".