Aikido is primarily concerned with how to take a persons balance. Along the way the Aikidoka learns many interesting things about how the body works but there are many very basic aspects of Martial Arts that are not learned. Kuta does a fantastic job of covering the basic concepts of Martial Art in a way that fits perfectly with Aikido. For this reason it is very beneficial to learn the basic principles of Martial Art before getting into the more esoteric principles of Aiki.