The Way of the warrior does not include other ways, such as Confucianism, Buddhism, certain traditions, artistic accomplishments, and dancing. But even though these are not part of the Way, if you know the Way broadly, you will see it in everything.
Miyamoto Musashi, Yamamoto Tsunetomo, Inazo Nitobe (2010). “Honor: Samurai Philosophy of Life - The Essential Samurai Collection; The Book of Five Rings, Hagakure: The Way of the Samurai, Bushido: The Soul of Japan.”, p.14, Bottom of the Hill