Gojūshiho Shō and Gojūshiho Dai are two versions in Shotokan of the same, single Shōrin-ryū kata called Useishi (54) or Gojūshiho. Originally, the names were reversed so that Dai was called Shō, and Shō was called Dai. The name change seems to have happened sometime in the 1960s or 1970s when a high-ranking JKA instructor announced `Gojū.... Found on http://en.wikipedia.org/wiki/Gojūshiho