Shimabuku Shinsho (Ciso) is the 2nd son of Isshin-Ryu's founder, Shimabuku Tatsuo. He began Isshin-Ryu study with his father at the age of 14. He quickly became proficient in his father's karate and was assigned to teach the many American service people that were flooding the dojo. Because of this he was given the name "Small Sensei" by many.
His older brother Kichiro took over Isshin-Ryu upon Tatsuo's death with Ciso taking a back seat. In interviews with Ciso Sensei over the years since 1994, it was obvious that he was well schooled not only in the physical techniques of Isshin-Ryu, but the Gokui or essential principles as well. The Gokui of any system is only handed down to a hand-picked few by the founder. Ciso was one of the few in Isshin-Ryu.
He was always kind, courteous and giving, never talking about himself, but always telling us "episodes" of his father and Isshin-Ryu's development. He would often say after the interviews to go back to your dojos and please honor his father. Ciso taught and remembered many of the early American Isshin-Ryu pioneers, A.J. Advincula, Steve Armstrong, Harold Mitchum and Don Nagle.
Ciso Sensei passed away in 2006.