Yong-In Lions Martial Arts is located in a strip mall that is set back from the road off Route 59 south of Renwick Road in Plainfield. Master Chang N. Yoon has more than 30 years of martial arts experience. He offers training for children (starting at age 4) and adults in Korean and Japanese-style martial arts. He teaches Tae Kwon Do and Hap Ki Do. He is certified in those and also Judo, Kumdo, Yoga, sports massage and physical therapy.