Kyoshi Kevin Blok has been a professional martial artist for over for 40 years and currently instructs and coordinates Aikido and defense and control classes for 25 schools. He was promoted to 8th Degree Black Belt in Aikido and awarded the teaching title of Kyoshi by the World Kobudo Federation in 2005 and holds instructor rankings in Karate, Iaido and Kung Fu. He is also the author of several books and numerous videos on Aikido, Weaponry, Non-Physical Crisis Intervention and police/security defense and control tactics.Five volumes to choose from. Volume 1.Basic Aikido I.Approx. 86 min. Volume 2.Basic Aikido II.Approx. 50 min.Volume 3.Intermediate Aikido I.Approx. 70 min.Volume 4.Intermediate Aikido II.Approx. 60 min.Volume 5.Advanced Aikido I.Approx. 78 min.