Musashi (武蔵) is a homeless vagabond. His real name is Nishiki Matsugorou (北斗心 松五郎), Ikumatsu's father.
Him and his wife, along with their daughter Ikumatsu, lived in poverty until they started a successful clothing business. One day, he saved a young boy from drowning on a river, who turned out to be Daigo (Ikumatsu's future husband). In the process, Matsugorou lost his memories and married another woman, leaving his wife and daughter behind. Years later, he is found by Daigo who takes him to his ramen shop in an attempt to repay the debt of saving his life.
A homeless man who wears large glasses, an orange cap and only loin-cloth on his lower body. It was shown that Musashi had a surprisingly impressive demeanour underneath the swirling eye-glasses
Musashi is usually compared to with Hasagawa, as they are both jobless. He seems to play badminton well, as seen in Episode 62.
He makes his debut in the series when the Shinsengumi were hunting down a certain "silver haired" samurai. Sougo tells Hijikata to catch a random guy with silver hair to appease the Shinsengumi. He then pulls Musashi aside, insinuating that they should just haul him back to the barracks.
In Lesson 433, It is revealed that he is Nishiki Ikumatsu's father
- In the anime episode's ending credits, he is usually listed as "Musashi-like person".
- Shares voice actor with other Gintama universe's characters, Nobunaga Oda, Prince Hata, Shishimura and Tamo-san.
- According the Owee Arc, Musashi has been living on the streets of Akihabara for three years.