Do is Nihon Go = Japanese language meaning Way or path. It is pronounced Dao or Tao in Chinese.
Steven L. Malanoski, Hanshi, 10th Dan, posts his hypothesis, reviews, news, commentary, high lights, opinions, tutorials, on Martial Arts. USA / Urban GoJu KaraTe, ShobuDo Ryu JuJitsu, and KoBuDo specifically, but not exclusively.