Miyamoto Musashi is an elderly man suffering from lung cancer. He wears a torn, dark kimono and has shoulder-length hair.
He is solemn and patient. He prays to Buddha for strength to stay alive.
The Musashi who appears in Shimousa is a still living Musashi who is sickly and dying years before his normal date of death. Sitting alone in a cave, he is awaiting his final opponent. He acts as the narrator for Shimousa.
It can be presumed he had reached all the abilities of his Female Counter part.