Isamu Tanonaka (田の中 勇, Tanonaka Isamu; July 19, 1932 – January 13, 2010) was a Japanese actor, voice actor and narrator from Taitō, Tokyo. He was best known for voicing Medama Oyaji in nearly every adaptation of Shigeru Mizuki's GeGeGe no Kitarō made during his lifetime. (Via Wikipedia)
