Ōta Dōkan (or Dokan Ota if you prefer), who lived from 1432 to 1486 was a samurai warrior-poet, military tactician and even a Buddhist monk at one point. He is best known for being the architect and builder of Edo Castle, which eventually became the seat of Tokugawa Ieyasu’s power and which in turn became the Imperial Palace, which we have today in Tokyo. I think it would be fair to say that if he hadn’t built that castle, modern-day Tokyo would probably never have been born. Historically, we have quite a debt to this man. Now you can see a statue of him at Tokyo International Forum, near Yurakucho station.