A homeless man who wears large glasses and an orange cap without pants. He seems to have many talents, including badminton. He's very similar to Hasegawa in that they are both often seen doing various oddjobs. Musashi has the eyes of a Samurai. Despite looking completely different otherwise, he is sometimes mistaken for Gintoki due to their similar hairstyles. In the credits, he's usually listed as "Musashi-like person."
It is revealed that his real name is Nishiki Matsugoro and is the father of Ikumatsu. He lost his memories 20 years ago after rescuing a drowning boy, who turned out to be Ikumatsu's future husband.