, also known as Ōta Sukenaga (太田 資長) or Ōta Dōkan Sukenaga, was a Japanese samurai warrior-poet, military tactician and Buddhist monk. Ōta Sukenaga took the tonsure (bald scalp) as a Buddhist priest in 1478, and he also adopted the Buddhist name, Dōkan, by which he is known today. Dōkan is best known as the architect and builder of Edo Castle (now the Imperial Palace) in what is today modern Tokyo; and he is considered the founder of the castle town which grew up around that Ōnin era fortress.