Sensei Mark Roberts is school head of Honshin Kan Martial Arts in Santa Rosa. He has been studying Danzan Ryu Jujitsu since 1994, earning his black belt in 1998 under his current sensei, Jeff Penner. He is a graduate of the Danzan Ryu Seifukujutsu Institute Modules I, II and III and holds the rank of Yodan (4th degree blackbelt) in Danzan Ryu. He also holds a Shodan in Aikido and has trained in Judo, Shorinji Kempo, and Tenshin Shoden Katori Shinto Ryu.