Daidoji Yūzan (1639–1730) was a samurai and military strategist during the Edo period in Japan. He was descended from a long line of prominent warriors, and was a well-known and sought-after teacher.

William Scott Wilson is the foremost translator into English of traditional Japanese texts on samurai culture. He received BA degrees from Dartmouth College and the Monterey Institute of Foreign Studies, and an MA in Japanese literary studies from the University of Washington. His best-selling translations include Hagakure, The Book of Five Rings, and Taiko. He is also the author of The Lone Samurai, a biography of the legendary samurai Miyamoto Musashi.