Okinawan karate and kobudo is typically filled with many throws, foot sweeps, chokes, arm bars, joint locks - it is just that they are not as obvious in kata as kick or a block- but they are there. They are within the kata as a way to learn muscle memory of the techniques, one just has to recognize where they exist, and they visualize them every time you practice kata.
At the Hombu Dojo - Students train in traditional Okinawan martial arts including karate, kobudo, and a variety of samurai arts that includes jujutsu and hanbo-justu. This is done to provide the students with a broad range of training.