There is a direct connection between Shuri karate systems and Japanese Budo. Soken Matsumura and many other Uchinadi that contributed to the creation of Shuri kata were trained in a system of swordsmanship called Jigen Ryu. This system has empty hand lists that resemble jujutsu and aikijujutsu that is practiced all over Japan today. Therefore, we should not be surprised at the similarities in technique.