The KSKA sign is the kanji (Japanese character) for "GI" and has been chosen by sensei Kase bacause "GI" is a part of

• GIchin Funakoshi
• GIgo Funakoshi
• GIri (dedication)

This clearly shows his admiration and gratitude towards master Gichin Funakoshi and his third son Gigo (also known as Yoshitaka) who, as we all know, had a great influence on sensei Kase's karate.

GIRI may be translated as DEDICATION and clearly shows sensei Kase promotes Karate as a way of living, as an attitude and not as a sport, practiced in a dojo and forgotten once you get out of it. It also emphasises his concern to promoto "life-time karate".