Gum-do

After walking around Osaka Castle, we were walking past an outbuilding when we heard the most frightening hollering and "Hiiiiii-yaaaa!"-ing coming from inside. Turns out it was a martial arts training centre. Visitors were welcome to stand at the entrance and watch the men and women practice a form of Gum-do. It was fascinating! I could've watched all day. They looked scary too, because their faces were covered with a black grill. I think they looked like characters in Super Mario Brothers. Take a look!