Dokkōdō, which translates to "The Path of Walking Alone" in English, is a short work written by Miyamoto Musashi, a Japanese swordsman, philosopher, and artist. It's a collection of 21 precepts, or rules, that Musashi considered essential for a person who is seeking to cultivate a strong and noble character. The work is often studied for its insights into strategy, tactics, and philosophy, not just for martial arts or sword fighting.