Ken Watanabe (渡辺 謙, Watanabe Ken, born October 21, 1959) is a Japanese actor. To English-speaking audiences, he is known for playing tragic hero characters, such as General Tadamichi Kuribayashi in Letters from Iwo Jima and Lord Katsumoto Moritsugu in The Last Samurai, for which he was nominated for the Academy Award for Best Supporting Actor.