The name Seishan means “13 hands”. This kata was named after a well-known Chinese martial artist who lived in or near Shuri c. 1700. The movements are repeated in sets of three, and has pivots and turning of the head. Funakoshi renamed this kata as Hangetsu.
Seisan is thought to be one of the oldest kata quite spread among other Nahate schools. Isshin-ryū also adopted this kata. This kata is also practiced in Korean styles such as Tang Soo Do and Soo Bahk Do and is called Sei-Shan or Seishan in Korean. Due to its difficulty, this kata is often reserved for advanced students.
[Source: Wikipedia]







