Nintaijutsu is a martial arts system made up by an Youtube celebrity named Greg park, in 2007. Greg Park is a resident of Los Angeles with Korean ancestry. Utilizing his background in TaeKwonDo training he invented his own martial art which he named Nintaijutsu, which is based around his own theory that Japanese Ninja were originally from Korea. Although historians, history books, and all evidence does not support his theory, he has continued to gain over 75,000 followers to his Korean stealth martial art.

Whatever martial art Chosuninja is obssesing on at the time.