Ken Watanabe is a Japanese actor. He is best 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. Among other awards, Watanabe has won the Japan Academy Film Prize for Best Actor twice, in 2007 for Memories of Tomorrow and in 2010 for The Unbroken. He is also known for his roles in Christopher Nolan's films Batman Begins and Inception, as well as Memoirs of a Geisha, and Pokémon Detective Pikachu.