The Concrete Dojo

"I was looking for some form of martial arts to begin implementing in my life when I found JR he is an incredible master and teacher, and through my journey with him I have not only developed incredible self disciplinary skills, but also management of my own mind in different life situations. The pri..." Read more

"I have been a part of JR’s training for almost a year now (June 2024). His training has been invaluable and I love the style he teaches of Shobukan karate. Its traditional approach requires a mental toughness from oneself and I personally have become more disciplined in other areas of my life since ..." Read more

"I have been a fitness weight training junkie my whole life but had no idea how demanding and satisfying old school karate could be. It takes mental strength too. JR breaks it down and keeps it free from making a belt or achieving some certificate every month. This is about mastery of a discipline."