After his father’s death in 1959, Kosho Kuniba was elected by the Shihan Board of Seishin-kai to the position of Soke of Motobu-ha Karate-do. He is the third person to have held this position. at the age of twenty-four, he became the youngest Karate Soke in Japan and took the Karate name “Shogo” which means strong warrior.
From: ” A Primer of Kuniba-ha Karate-do: The Style of Shogo Kuniba,” Shihan James Herndon, 1984, 2009; page 14