If you are not familiar with Musashi, the historical figure, you should be. He is known primarily as a swordsman. Not just any old swordsman, but the greatest in Japan of his day. And saying that would be like saying Van Gogh liked color. Musashi also became the greatest artist of his day, and his works are now considered to be priceless.
At the end of the day, Musashi is about mastering the self to create meaning out of life. Not a trivial subject.
One of my favorite images
Musashi breaking out of the bath. For more on that story, check out this link.