Instructors
All training at Nintai Kai is guided by a lead instructor and supported by dedicated assistant instructors, providing clear structure and personal attention. This approach helps create a safe, steady learning environment where students can progress at their own pace.
Steve Castle-Mackie - Lead Instructor
Steve Castle-Mackie is the founder and lead instructor of Nintai Kai. He has trained for many years in Japanese sword arts and practises Battōdō within the Nakamura Ryū and Kurikara Heiho Ryū traditions. His training has been undertaken primarily under John Evans Sensei (7th Dan) of Fudokan London, who received direct instruction from Nakamura Taizaburō Sensei, founder of Nakamura Ryū Battōdō. In addition, Steve has broadened his experience through competing in TaiKai events, seminars, and training visits to Japan. He instructs all regular classes at Nintai Kai, ensuring consistency of teaching, technical clarity, and steady progression for students. His approach emphasises correct fundamentals, safe training, and long-term development, particularly for those starting later in life or returning to physical practice after time away.
Marko Zupancic - Assistant Instructor
Marko began training in martial arts as a teenager in Slovenia, starting with karate before moving into Japanese jujutsu, which he pursued through his university years. Alongside this, he trained in Tai Ji Quan (Yang and Chen styles), developing an interest in efficient movement and coordination. After relocating to the UK, he continued his jujutsu practice and later spent almost a decade training in Krav Maga, where he also served as an assistant instructor. Marko began training in Battōdō at Nintai Kai in 2022 and supports classes as an assistant instructor, contributing a practical, methodical approach to paired work, application, and progressive skill development.
Charlie Upton - Assistant Instructor
Charlie began training in martial arts in the early 1980s, with experience in full-contact karate and boxing before moving into Seven Star Praying Mantis kung fu, which he trained in and taught for over 25 years. His wider practice has included aikidō, tai chi, and qigong, alongside formal study in acupuncture and Chinese medicine. He is also a qualified Archery GB coach. Charlie began training in Battōdō at Nintai Kai when the dojo opened in 2022 and supports classes as an assistant instructor, bringing a depth of experience in body conditioning, structure, and internal practice, with a calm and attentive approach to training.