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1948- . Born in Tokyo, Koyama studied literature at Waseda University and joined Tatsunoko Productions after graduation. His debut work was an episode of Rural Leader, which he followed with scripts for Casshan and Song of the Ladybugs, before going freelance in 1975. He subsequently wrote for the Time Bokan series and Dragon Ball. As a guest at American conventions, Koyama has made some controversial (and to the authors, highly welcome) comments about the state of the anime business, decrying the outsourcing of talent and production, and criticizing the "glorified advertisements" that comprise much of the video market. He has also explained why so much of Dragon Ball seems like a prolonged fight scene, since on occasion he had been asked to turn a single panel from the manga into a 25-minute episode.